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nonSurvey ** Announcement - Workshop: Science from UKIDSS II, 15-17 Dec 2008, London UK ** |
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Glossary of WSA attributes |
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This Glossary alphabetically lists all attributes used in the UKIDSSDR1 database(s) held in the WSA. If you would like to have more information about the schema tables please use the UKIDSSDR1 Schema Browser (other Browser versions). |
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
H | ||||||||
|---|---|---|---|---|---|---|---|---|
| Name | Schema Table | Database | Description | Type | Length | Unit | Default Value | Unified Content Descriptor |
| h2_1AperMag3 | gpsSource | WSA | Default point/extended source 1st epoch H2 aperture corrected mag (2.0 arcsec aperture diameter) If in doubt use this flux estimator |
real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_1AperMag3Err | gpsSource | WSA | Error in default point/extended source 1st epoch H2 mag (2.0 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_1AperMag4 | gpsSource | WSA | Extended source 1st epoch H2 aperture corrected mag (2.8 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_1AperMag4Err | gpsSource | WSA | Error in extended source 1st epoch H2 mag (2.8 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_1AperMag6 | gpsSource | WSA | Extended source 1st epoch H2 aperture corrected mag (5.7 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_1AperMag6Err | gpsSource | WSA | Error in extended source 1st epoch H2 mag (5.7 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_1Class | gpsSource, gpsSourceRemeasurement | WSA | discrete image classification flag in 1st epoch H2 | smallint | 2 | -9999 | CLASS_MISC | |
| h2_1ClassStat | gpsSource, gpsSourceRemeasurement | WSA | N(0,1) stellarness-of-profile statistic in 1st epoch H2 | real | 4 | -0.9999995e9 | STAT_PROP | |
| h2_1Deblend | gpsSource, gpsSourceRemeasurement | WSA | flag indicating parent/child relation in 1st epoch H2 | int | 4 | -99999999 | CODE_MISC | |
| h2_1Ell | gpsSource, gpsSourceRemeasurement | WSA | 1-b/a, where a/b=semi-major/minor axes in 1st epoch H2 | real | 4 | -0.9999995e9 | PHYS_ELLIPTICITY | |
| h2_1eNum | gpsMergeLog | WSA | the extension number of this 1st epoch H2 frame | tinyint | 1 | NUMBER | ||
| h2_1ErrBits | gpsSource, gpsSourceRemeasurement | WSA | processing warning/error bitwise flags in 1st epoch H2 | int | 4 | -99999999 | CODE_MISC | |
| h2_1Eta | gpsSource | WSA | Offset of 1st epoch H2 detection from master position (+north/-south) | real | 4 | arcsec | -0.9999995e9 | POS_EQ_DEC_OFF |
| When associating individual passband detections into merged sources, a generous (in terms of the positional uncertainties) pairing radius of 2.0 (UKIDSS LAS and GPS; also non-survey programmes) or 1.0 (UKIDSS GPS, DXS and UDS) arcseconds is used, the higher value enabling pairing of moving sources when epoch separations may be several years. Such a large association criterion can of course lead to spurious pairings in the merged sources lists (although note that between passband pairs, handshake pairing is done: both passbands must agree that the candidate pair is their nearest neighbour for the pair to propagate through into the merged source table). In order to help filter spurious pairings out, and assuming that large positional offsets between the different passband detections are not expected (e.g. because of source motion, or larger than usual positional uncertainties) then the attributes Xi and Eta can be used to filter any pairings with suspiciously large offsets in one or more bands. For example, for a clean sample of QSOs from the LAS, you might wish to insist that the offsets in the selected sample are all below 1 arcsecond: simply add WHERE clauses into the SQL sample selection script to exclude all Xi and Eta values larger than the threshold you want. | ||||||||
| h2_1Gausig | gpsSource, gpsSourceRemeasurement | WSA | RMS of axes of ellipse fit in 1st epoch H2 | real | 4 | pixels | -0.9999995e9 | MORPH_PARAM |
| h2_1HallMag | gpsSource | WSA | Total point source 1st epoch H2 mag | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_1HallMagErr | gpsSource | WSA | Error in total point source 1st epoch H2 mag | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_1Mag | gpsSourceRemeasurement | WSA | 1st epoch H2 mag (as appropriate for this merged source) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_1MagErr | gpsSourceRemeasurement | WSA | Error in 1st epoch H2 mag | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_1mfID | gpsMergeLog | WSA | the UID of the relevant 1st epoch H2 multiframe | bigint | 8 | ID_FRAME | ||
| h2_1mk_1 | gpsSourceRemeasurement | WSA | Default colour H2-K (using appropriate mags) | real | 4 | mag | PHOT_COLOR | |
| h2_1mk_1Err | gpsSourceRemeasurement | WSA | Error on colour H2-K | real | 4 | mag | ERROR | |
| h2_1mk_1Ext | gpsSource | WSA | Extended source colour H2-K (using aperMag3) | real | 4 | mag | -0.9999995e9 | PHOT_COLOR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| h2_1mk_1ExtErr | gpsSource | WSA | Error on extended source colour H2-K | real | 4 | mag | -0.9999995e9 | ERROR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| h2_1mk_1Pnt | gpsSource | WSA | Point source colour H2-K (using aperMag3) | real | 4 | mag | -0.9999995e9 | PHOT_COLOR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| h2_1mk_1PntErr | gpsSource | WSA | Error on point source colour H2-K | real | 4 | mag | -0.9999995e9 | ERROR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| h2_1ObjID | gpsSource | WSA | the UID of the 1st epoch H2 detection | bigint | 8 | -99999999 | ID_NUMBER | |
| h2_1ObjID | gpsSourceRemeasurement | WSA | the UID of the 1st epoch H2 remeasurement | bigint | 8 | -99999999 | ID_NUMBER | |
| h2_1PA | gpsSource, gpsSourceRemeasurement | WSA | ellipse fit celestial orientation in 1st epoch H2 | real | 4 | Degrees | -0.9999995e9 | POS_POS-ANG |
| h2_1PetroMag | gpsSource | WSA | Extended source 1st epoch H2 mag (Petrosian) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_1PetroMagErr | gpsSource | WSA | Error in extended source 1st epoch H2 mag (Petrosian) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_1ppErrBits | gpsSource, gpsSourceRemeasurement | WSA | additional WFAU post-processing error bits in 1st epoch H2 | int | 4 | 0 | CODE_MISC | |
| h2_1PsfMag | gpsSource | WSA | Point source profile-fitted 1st epoch H2 mag | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_1PsfMagErr | gpsSource | WSA | Error in point source profile-fitted 1st epoch H2 mag | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_1SeqNum | gpsSource | WSA | the running number of the 1st epoch H2 detection | int | 4 | -99999999 | ID_NUMBER | |
| h2_1SeqNum | gpsSourceRemeasurement | WSA | the running number of the 1st epoch H2 remeasurement | int | 4 | -99999999 | ID_NUMBER | |
| h2_1SerMag2D | gpsSource | WSA | Extended source 1st epoch H2 mag (profile-fitted) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_1SerMag2DErr | gpsSource | WSA | Error in extended source 1st epoch H2 mag (profile-fitted) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_1Xi | gpsSource | WSA | Offset of 1st epoch H2 detection from master position (+east/-west) | real | 4 | arcsec | -0.9999995e9 | POS_EQ_RA_OFF |
| When associating individual passband detections into merged sources, a generous (in terms of the positional uncertainties) pairing radius of 2.0 (UKIDSS LAS and GPS; also non-survey programmes) or 1.0 (UKIDSS GPS, DXS and UDS) arcseconds is used, the higher value enabling pairing of moving sources when epoch separations may be several years. Such a large association criterion can of course lead to spurious pairings in the merged sources lists (although note that between passband pairs, handshake pairing is done: both passbands must agree that the candidate pair is their nearest neighbour for the pair to propagate through into the merged source table). In order to help filter spurious pairings out, and assuming that large positional offsets between the different passband detections are not expected (e.g. because of source motion, or larger than usual positional uncertainties) then the attributes Xi and Eta can be used to filter any pairings with suspiciously large offsets in one or more bands. For example, for a clean sample of QSOs from the LAS, you might wish to insist that the offsets in the selected sample are all below 1 arcsecond: simply add WHERE clauses into the SQL sample selection script to exclude all Xi and Eta values larger than the threshold you want. | ||||||||
| h2_2AperMag3 | gpsSource | WSA | Default point/extended source 2nd epoch H2 aperture corrected mag (2.0 arcsec aperture diameter) If in doubt use this flux estimator |
real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_2AperMag3Err | gpsSource | WSA | Error in default point/extended source 2nd epoch H2 mag (2.0 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_2AperMag4 | gpsSource | WSA | Extended source 2nd epoch H2 aperture corrected mag (2.8 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_2AperMag4Err | gpsSource | WSA | Error in extended source 2nd epoch H2 mag (2.8 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_2AperMag6 | gpsSource | WSA | Extended source 2nd epoch H2 aperture corrected mag (5.7 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_2AperMag6Err | gpsSource | WSA | Error in extended source 2nd epoch H2 mag (5.7 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_2Class | gpsSource, gpsSourceRemeasurement | WSA | discrete image classification flag in 2nd epoch H2 | smallint | 2 | -9999 | CLASS_MISC | |
| h2_2ClassStat | gpsSource, gpsSourceRemeasurement | WSA | N(0,1) stellarness-of-profile statistic in 2nd epoch H2 | real | 4 | -0.9999995e9 | STAT_PROP | |
| h2_2Deblend | gpsSource, gpsSourceRemeasurement | WSA | flag indicating parent/child relation in 2nd epoch H2 | int | 4 | -99999999 | CODE_MISC | |
| h2_2Ell | gpsSource, gpsSourceRemeasurement | WSA | 1-b/a, where a/b=semi-major/minor axes in 2nd epoch H2 | real | 4 | -0.9999995e9 | PHYS_ELLIPTICITY | |
| h2_2eNum | gpsMergeLog | WSA | the extension number of this 2nd epoch H2 frame | tinyint | 1 | NUMBER | ||
| h2_2ErrBits | gpsSource, gpsSourceRemeasurement | WSA | processing warning/error bitwise flags in 2nd epoch H2 | int | 4 | -99999999 | CODE_MISC | |
| h2_2Eta | gpsSource | WSA | Offset of 2nd epoch H2 detection from master position (+north/-south) | real | 4 | arcsec | -0.9999995e9 | POS_EQ_DEC_OFF |
| When associating individual passband detections into merged sources, a generous (in terms of the positional uncertainties) pairing radius of 2.0 (UKIDSS LAS and GPS; also non-survey programmes) or 1.0 (UKIDSS GPS, DXS and UDS) arcseconds is used, the higher value enabling pairing of moving sources when epoch separations may be several years. Such a large association criterion can of course lead to spurious pairings in the merged sources lists (although note that between passband pairs, handshake pairing is done: both passbands must agree that the candidate pair is their nearest neighbour for the pair to propagate through into the merged source table). In order to help filter spurious pairings out, and assuming that large positional offsets between the different passband detections are not expected (e.g. because of source motion, or larger than usual positional uncertainties) then the attributes Xi and Eta can be used to filter any pairings with suspiciously large offsets in one or more bands. For example, for a clean sample of QSOs from the LAS, you might wish to insist that the offsets in the selected sample are all below 1 arcsecond: simply add WHERE clauses into the SQL sample selection script to exclude all Xi and Eta values larger than the threshold you want. | ||||||||
| h2_2Gausig | gpsSource, gpsSourceRemeasurement | WSA | RMS of axes of ellipse fit in 2nd epoch H2 | real | 4 | pixels | -0.9999995e9 | MORPH_PARAM |
| h2_2HallMag | gpsSource | WSA | Total point source 2nd epoch H2 mag | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_2HallMagErr | gpsSource | WSA | Error in total point source 2nd epoch H2 mag | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_2Mag | gpsSourceRemeasurement | WSA | 2nd epoch H2 mag (as appropriate for this merged source) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_2MagErr | gpsSourceRemeasurement | WSA | Error in 2nd epoch H2 mag | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_2mfID | gpsMergeLog | WSA | the UID of the relevant 2nd epoch H2 multiframe | bigint | 8 | ID_FRAME | ||
| h2_2ObjID | gpsSource | WSA | the UID of the 2nd epoch H2 detection | bigint | 8 | -99999999 | ID_NUMBER | |
| h2_2ObjID | gpsSourceRemeasurement | WSA | the UID of the 2nd epoch H2 remeasurement | bigint | 8 | -99999999 | ID_NUMBER | |
| h2_2PA | gpsSource, gpsSourceRemeasurement | WSA | ellipse fit celestial orientation in 2nd epoch H2 | real | 4 | Degrees | -0.9999995e9 | POS_POS-ANG |
| h2_2PetroMag | gpsSource | WSA | Extended source 2nd epoch H2 mag (Petrosian) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_2PetroMagErr | gpsSource | WSA | Error in extended source 2nd epoch H2 mag (Petrosian) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_2ppErrBits | gpsSource, gpsSourceRemeasurement | WSA | additional WFAU post-processing error bits in 2nd epoch H2 | int | 4 | 0 | CODE_MISC | |
| h2_2PsfMag | gpsSource | WSA | Point source profile-fitted 2nd epoch H2 mag | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_2PsfMagErr | gpsSource | WSA | Error in point source profile-fitted 2nd epoch H2 mag | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_2SeqNum | gpsSource | WSA | the running number of the 2nd epoch H2 detection | int | 4 | -99999999 | ID_NUMBER | |
| h2_2SeqNum | gpsSourceRemeasurement | WSA | the running number of the 2nd epoch H2 remeasurement | int | 4 | -99999999 | ID_NUMBER | |
| h2_2SerMag2D | gpsSource | WSA | Extended source 2nd epoch H2 mag (profile-fitted) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_2SerMag2DErr | gpsSource | WSA | Error in extended source 2nd epoch H2 mag (profile-fitted) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_2Xi | gpsSource | WSA | Offset of 2nd epoch H2 detection from master position (+east/-west) | real | 4 | arcsec | -0.9999995e9 | POS_EQ_RA_OFF |
| When associating individual passband detections into merged sources, a generous (in terms of the positional uncertainties) pairing radius of 2.0 (UKIDSS LAS and GPS; also non-survey programmes) or 1.0 (UKIDSS GPS, DXS and UDS) arcseconds is used, the higher value enabling pairing of moving sources when epoch separations may be several years. Such a large association criterion can of course lead to spurious pairings in the merged sources lists (although note that between passband pairs, handshake pairing is done: both passbands must agree that the candidate pair is their nearest neighbour for the pair to propagate through into the merged source table). In order to help filter spurious pairings out, and assuming that large positional offsets between the different passband detections are not expected (e.g. because of source motion, or larger than usual positional uncertainties) then the attributes Xi and Eta can be used to filter any pairings with suspiciously large offsets in one or more bands. For example, for a clean sample of QSOs from the LAS, you might wish to insist that the offsets in the selected sample are all below 1 arcsecond: simply add WHERE clauses into the SQL sample selection script to exclude all Xi and Eta values larger than the threshold you want. | ||||||||
| h2_3AperMag3 | gpsSource | WSA | Default point/extended source 3rd epoch H2 aperture corrected mag (2.0 arcsec aperture diameter) If in doubt use this flux estimator |
real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_3AperMag3Err | gpsSource | WSA | Error in default point/extended source 3rd epoch H2 mag (2.0 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_3AperMag4 | gpsSource | WSA | Extended source 3rd epoch H2 aperture corrected mag (2.8 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_3AperMag4Err | gpsSource | WSA | Error in extended source 3rd epoch H2 mag (2.8 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_3AperMag6 | gpsSource | WSA | Extended source 3rd epoch H2 aperture corrected mag (5.7 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_3AperMag6Err | gpsSource | WSA | Error in extended source 3rd epoch H2 mag (5.7 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_3Class | gpsSource, gpsSourceRemeasurement | WSA | discrete image classification flag in 3rd epoch H2 | smallint | 2 | -9999 | CLASS_MISC | |
| h2_3ClassStat | gpsSource, gpsSourceRemeasurement | WSA | N(0,1) stellarness-of-profile statistic in 3rd epoch H2 | real | 4 | -0.9999995e9 | STAT_PROP | |
| h2_3Deblend | gpsSource, gpsSourceRemeasurement | WSA | flag indicating parent/child relation in 3rd epoch H2 | int | 4 | -99999999 | CODE_MISC | |
| h2_3Ell | gpsSource, gpsSourceRemeasurement | WSA | 1-b/a, where a/b=semi-major/minor axes in 3rd epoch H2 | real | 4 | -0.9999995e9 | PHYS_ELLIPTICITY | |
| h2_3eNum | gpsMergeLog | WSA | the extension number of this 3rd epoch H2 frame | tinyint | 1 | NUMBER | ||
| h2_3ErrBits | gpsSource, gpsSourceRemeasurement | WSA | processing warning/error bitwise flags in 3rd epoch H2 | int | 4 | -99999999 | CODE_MISC | |
| h2_3Eta | gpsSource | WSA | Offset of 3rd epoch H2 detection from master position (+north/-south) | real | 4 | arcsec | -0.9999995e9 | POS_EQ_DEC_OFF |
| When associating individual passband detections into merged sources, a generous (in terms of the positional uncertainties) pairing radius of 2.0 (UKIDSS LAS and GPS; also non-survey programmes) or 1.0 (UKIDSS GPS, DXS and UDS) arcseconds is used, the higher value enabling pairing of moving sources when epoch separations may be several years. Such a large association criterion can of course lead to spurious pairings in the merged sources lists (although note that between passband pairs, handshake pairing is done: both passbands must agree that the candidate pair is their nearest neighbour for the pair to propagate through into the merged source table). In order to help filter spurious pairings out, and assuming that large positional offsets between the different passband detections are not expected (e.g. because of source motion, or larger than usual positional uncertainties) then the attributes Xi and Eta can be used to filter any pairings with suspiciously large offsets in one or more bands. For example, for a clean sample of QSOs from the LAS, you might wish to insist that the offsets in the selected sample are all below 1 arcsecond: simply add WHERE clauses into the SQL sample selection script to exclude all Xi and Eta values larger than the threshold you want. | ||||||||
| h2_3Gausig | gpsSource, gpsSourceRemeasurement | WSA | RMS of axes of ellipse fit in 3rd epoch H2 | real | 4 | pixels | -0.9999995e9 | MORPH_PARAM |
| h2_3HallMag | gpsSource | WSA | Total point source 3rd epoch H2 mag | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_3HallMagErr | gpsSource | WSA | Error in total point source 3rd epoch H2 mag | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_3Mag | gpsSourceRemeasurement | WSA | 3rd epoch H2 mag (as appropriate for this merged source) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_3MagErr | gpsSourceRemeasurement | WSA | Error in 3rd epoch H2 mag | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_3mfID | gpsMergeLog | WSA | the UID of the relevant 3rd epoch H2 multiframe | bigint | 8 | ID_FRAME | ||
| h2_3ObjID | gpsSource | WSA | the UID of the 3rd epoch H2 detection | bigint | 8 | -99999999 | ID_NUMBER | |
| h2_3ObjID | gpsSourceRemeasurement | WSA | the UID of the 3rd epoch H2 remeasurement | bigint | 8 | -99999999 | ID_NUMBER | |
| h2_3PA | gpsSource, gpsSourceRemeasurement | WSA | ellipse fit celestial orientation in 3rd epoch H2 | real | 4 | Degrees | -0.9999995e9 | POS_POS-ANG |
| h2_3PetroMag | gpsSource | WSA | Extended source 3rd epoch H2 mag (Petrosian) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_3PetroMagErr | gpsSource | WSA | Error in extended source 3rd epoch H2 mag (Petrosian) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_3ppErrBits | gpsSource, gpsSourceRemeasurement | WSA | additional WFAU post-processing error bits in 3rd epoch H2 | int | 4 | 0 | CODE_MISC | |
| h2_3PsfMag | gpsSource | WSA | Point source profile-fitted 3rd epoch H2 mag | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_3PsfMagErr | gpsSource | WSA | Error in point source profile-fitted 3rd epoch H2 mag | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_3SeqNum | gpsSource | WSA | the running number of the 3rd epoch H2 detection | int | 4 | -99999999 | ID_NUMBER | |
| h2_3SeqNum | gpsSourceRemeasurement | WSA | the running number of the 3rd epoch H2 remeasurement | int | 4 | -99999999 | ID_NUMBER | |
| h2_3SerMag2D | gpsSource | WSA | Extended source 3rd epoch H2 mag (profile-fitted) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| h2_3SerMag2DErr | gpsSource | WSA | Error in extended source 3rd epoch H2 mag (profile-fitted) | real | 4 | mag | -0.9999995e9 | ERROR |
| h2_3Xi | gpsSource | WSA | Offset of 3rd epoch H2 detection from master position (+east/-west) | real | 4 | arcsec | -0.9999995e9 | POS_EQ_RA_OFF |
| When associating individual passband detections into merged sources, a generous (in terms of the positional uncertainties) pairing radius of 2.0 (UKIDSS LAS and GPS; also non-survey programmes) or 1.0 (UKIDSS GPS, DXS and UDS) arcseconds is used, the higher value enabling pairing of moving sources when epoch separations may be several years. Such a large association criterion can of course lead to spurious pairings in the merged sources lists (although note that between passband pairs, handshake pairing is done: both passbands must agree that the candidate pair is their nearest neighbour for the pair to propagate through into the merged source table). In order to help filter spurious pairings out, and assuming that large positional offsets between the different passband detections are not expected (e.g. because of source motion, or larger than usual positional uncertainties) then the attributes Xi and Eta can be used to filter any pairings with suspiciously large offsets in one or more bands. For example, for a clean sample of QSOs from the LAS, you might wish to insist that the offsets in the selected sample are all below 1 arcsecond: simply add WHERE clauses into the SQL sample selection script to exclude all Xi and Eta values larger than the threshold you want. | ||||||||
| h2Mag | CurrentStdStarInfo, PreviousStdStarInfo | WSA | H2 band total magnitude of star (from external sources if primary) | real | 4 | mag | PHOT_INT-MAG | |
| h2MagErr | CurrentStdStarInfo, PreviousStdStarInfo | WSA | H2 band magnitude error of star | real | 4 | mag | ERROR | |
| h_2mrat | twomass_scn | 2MASS | H-band average 2nd image moment ratio. | real | 4 | FIT_PARAM_VALUE | ||
| h_5sig_ba | twomass_xsc | 2MASS | H minor/major axis ratio fit to the 5-sigma isophote. | real | 4 | PHYS_AXIS-RATIO | ||
| h_5sig_phi | twomass_xsc | 2MASS | H angle to 5-sigma major axis (E of N). | smallint | 2 | degrees | ERROR | |
| h_5surf | twomass_xsc | 2MASS | H central surface brightness (r<=5). | real | 4 | mag | PHOT_SB_GENERAL | |
| h_ba | twomass_xsc | 2MASS | H minor/major axis ratio fit to the 3-sigma isophote. | real | 4 | PHYS_AXIS-RATIO | ||
| h_back | twomass_xsc | 2MASS | H coadd median background. | real | 4 | CODE_MISC | ||
| h_bisym_chi | twomass_xsc | 2MASS | H bi-symmetric cross-correlation chi. | real | 4 | FIT_PARAM_VALUE | ||
| h_bisym_rat | twomass_xsc | 2MASS | H bi-symmetric flux ratio. | real | 4 | PHOT_FLUX_RATIO | ||
| h_bndg_amp | twomass_xsc | 2MASS | H banding maximum FT amplitude on this side of coadd. | real | 4 | DN | FIT_PARAM_VALUE | |
| h_bndg_per | twomass_xsc | 2MASS | H banding Fourier Transf. period on this side of coadd. | int | 4 | arcsec | FIT_PARAM_VALUE | |
| h_cmsig | twomass_psc | 2MASS | Corrected photometric uncertainty for the default H-band magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_con_indx | twomass_xsc | 2MASS | H concentration index r_75%/r_25%. | real | 4 | PHYS_CONCENT_INDEX | ||
| h_d_area | twomass_xsc | 2MASS | H 5-sigma to 3-sigma differential area. | smallint | 2 | FIT_RESIDUAL | ||
| h_flg_10 | twomass_xsc | 2MASS | H confusion flag for 10 arcsec circular ap. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_15 | twomass_xsc | 2MASS | H confusion flag for 15 arcsec circular ap. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_20 | twomass_xsc | 2MASS | H confusion flag for 20 arcsec circular ap. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_25 | twomass_xsc | 2MASS | H confusion flag for 25 arcsec circular ap. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_30 | twomass_xsc | 2MASS | H confusion flag for 30 arcsec circular ap. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_40 | twomass_xsc | 2MASS | H confusion flag for 40 arcsec circular ap. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_5 | twomass_xsc | 2MASS | H confusion flag for 5 arcsec circular ap. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_50 | twomass_xsc | 2MASS | H confusion flag for 50 arcsec circular ap. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_60 | twomass_xsc | 2MASS | H confusion flag for 60 arcsec circular ap. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_7 | twomass_xsc | 2MASS | H confusion flag for 7 arcsec circular ap. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_70 | twomass_xsc | 2MASS | H confusion flag for 70 arcsec circular ap. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_c | twomass_xsc | 2MASS | H confusion flag for Kron circular mag. | smallint | 2 | CODE_MISC | ||
| h_flg_e | twomass_xsc | 2MASS | H confusion flag for Kron elliptical mag. | smallint | 2 | CODE_MISC | ||
| h_flg_fc | twomass_xsc | 2MASS | H confusion flag for fiducial Kron circ. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_fe | twomass_xsc | 2MASS | H confusion flag for fiducial Kron ell. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_i20c | twomass_xsc | 2MASS | H confusion flag for 20mag/sq." iso. circ. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_i20e | twomass_xsc | 2MASS | H confusion flag for 20mag/sq." iso. ell. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_i21c | twomass_xsc | 2MASS | H confusion flag for 21mag/sq." iso. circ. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_i21e | twomass_xsc | 2MASS | H confusion flag for 21mag/sq." iso. ell. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_j21fc | twomass_xsc | 2MASS | H confusion flag for 21mag/sq." iso. fid. circ. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_j21fe | twomass_xsc | 2MASS | H confusion flag for 21mag/sq." iso. fid. ell. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_k20fc | twomass_xsc | 2MASS | H confusion flag for 20mag/sq." iso. fid. circ. mag. | smallint | 2 | CODE_MISC | ||
| h_flg_k20fe | twomass_xsc | 2MASS | H confusion flag for 20mag/sq." iso. fid. ell. mag. | smallint | 2 | CODE_MISC | ||
| h_m | twomass_psc | 2MASS | Default H-band magnitude | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_10 | twomass_xsc | 2MASS | H 10 arcsec radius circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_15 | twomass_xsc | 2MASS | H 15 arcsec radius circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_20 | twomass_xsc | 2MASS | H 20 arcsec radius circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_25 | twomass_xsc | 2MASS | H 25 arcsec radius circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_30 | twomass_xsc | 2MASS | H 30 arcsec radius circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_40 | twomass_xsc | 2MASS | H 40 arcsec radius circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_5 | twomass_xsc | 2MASS | H 5 arcsec radius circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_50 | twomass_xsc | 2MASS | H 50 arcsec radius circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_60 | twomass_xsc | 2MASS | H 60 arcsec radius circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_7 | twomass_xsc | 2MASS | H 7 arcsec radius circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_70 | twomass_xsc | 2MASS | H 70 arcsec radius circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_c | twomass_xsc | 2MASS | H Kron circular aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_e | twomass_xsc | 2MASS | H Kron elliptical aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_ext | twomass_xsc | 2MASS | H mag from fit extrapolation. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_fc | twomass_xsc | 2MASS | H fiducial Kron circular magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_fe | twomass_xsc | 2MASS | H fiducial Kron ell. mag aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_i20c | twomass_xsc | 2MASS | H 20mag/sq." isophotal circular ap. magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_i20e | twomass_xsc | 2MASS | H 20mag/sq." isophotal elliptical ap. magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_i21c | twomass_xsc | 2MASS | H 21mag/sq." isophotal circular ap. magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_i21e | twomass_xsc | 2MASS | H 21mag/sq." isophotal elliptical ap. magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_j21fc | twomass_xsc | 2MASS | H 21mag/sq." isophotal fiducial circ. ap. mag. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_j21fe | twomass_xsc | 2MASS | H 21mag/sq." isophotal fiducial ell. ap. magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_k20fc | twomass_xsc | 2MASS | H 20mag/sq." isophotal fiducial circ. ap. mag. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_k20fe | twomass_xsc | 2MASS | H 20mag/sq." isophotal fiducial ell. ap. magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_stdap | twomass_psc | 2MASS | H-band "standard" aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_m_sys | twomass_xsc | 2MASS | H system photometry magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_mnsurfb_eff | twomass_xsc | 2MASS | H mean surface brightness at the half-light radius. | real | 4 | mag | PHOT_SB_GENERAL | |
| h_msig_10 | twomass_xsc | 2MASS | H 1-sigma uncertainty in 10 arcsec circular ap. mag. | real | 4 | mag | ERROR | |
| h_msig_15 | twomass_xsc | 2MASS | H 1-sigma uncertainty in 15 arcsec circular ap. mag. | real | 4 | mag | ERROR | |
| h_msig_20 | twomass_xsc | 2MASS | H 1-sigma uncertainty in 20 arcsec circular ap. mag. | real | 4 | mag | ERROR | |
| h_msig_25 | twomass_xsc | 2MASS | H 1-sigma uncertainty in 25 arcsec circular ap. mag. | real | 4 | mag | ERROR | |
| h_msig_30 | twomass_xsc | 2MASS | H 1-sigma uncertainty in 30 arcsec circular ap. mag. | real | 4 | mag | ERROR | |
| h_msig_40 | twomass_xsc | 2MASS | H 1-sigma uncertainty in 40 arcsec circular ap. mag. | real | 4 | mag | ERROR | |
| h_msig_5 | twomass_xsc | 2MASS | H 1-sigma uncertainty in 5 arcsec circular ap. mag. | real | 4 | mag | ERROR | |
| h_msig_50 | twomass_xsc | 2MASS | H 1-sigma uncertainty in 50 arcsec circular ap. mag. | real | 4 | mag | ERROR | |
| h_msig_60 | twomass_xsc | 2MASS | H 1-sigma uncertainty in 60 arcsec circular ap. mag. | real | 4 | mag | ERROR | |
| h_msig_7 | twomass_xsc | 2MASS | H 1-sigma uncertainty in 7 arcsec circular ap. mag. | real | 4 | mag | ERROR | |
| h_msig_70 | twomass_xsc | 2MASS | H 1-sigma uncertainty in 70 arcsec circular ap. mag. | real | 4 | mag | ERROR | |
| h_msig_c | twomass_xsc | 2MASS | H 1-sigma uncertainty in Kron circular mag. | real | 4 | mag | ERROR | |
| h_msig_e | twomass_xsc | 2MASS | H 1-sigma uncertainty in Kron elliptical mag. | real | 4 | mag | ERROR | |
| h_msig_ext | twomass_xsc | 2MASS | H 1-sigma uncertainty in mag from fit extrapolation. | real | 4 | mag | ERROR | |
| h_msig_fc | twomass_xsc | 2MASS | H 1-sigma uncertainty in fiducial Kron circ. mag. | real | 4 | mag | ERROR | |
| h_msig_fe | twomass_xsc | 2MASS | H 1-sigma uncertainty in fiducial Kron ell. mag. | real | 4 | mag | ERROR | |
| h_msig_i20c | twomass_xsc | 2MASS | H 1-sigma uncertainty in 20mag/sq." iso. circ. mag. | real | 4 | mag | ERROR | |
| h_msig_i20e | twomass_xsc | 2MASS | H 1-sigma uncertainty in 20mag/sq." iso. ell. mag. | real | 4 | mag | ERROR | |
| h_msig_i21c | twomass_xsc | 2MASS | H 1-sigma uncertainty in 21mag/sq." iso. circ. mag. | real | 4 | mag | ERROR | |
| h_msig_i21e | twomass_xsc | 2MASS | H 1-sigma uncertainty in 21mag/sq." iso. ell. mag. | real | 4 | mag | ERROR | |
| h_msig_j21fc | twomass_xsc | 2MASS | H 1-sigma uncertainty in 21mag/sq." iso.fid.circ.mag. | real | 4 | mag | ERROR | |
| h_msig_j21fe | twomass_xsc | 2MASS | H 1-sigma uncertainty in 21mag/sq." iso.fid.ell.mag. | real | 4 | mag | ERROR | |
| h_msig_k20fc | twomass_xsc | 2MASS | H 1-sigma uncertainty in 20mag/sq." iso.fid.circ. mag. | real | 4 | mag | ERROR | |
| h_msig_k20fe | twomass_xsc | 2MASS | H 1-sigma uncertainty in 20mag/sq." iso.fid.ell.mag. | real | 4 | mag | ERROR | |
| h_msig_stdap | twomass_psc | 2MASS | Uncertainty in the H-band standard aperture magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_msig_sys | twomass_xsc | 2MASS | H 1-sigma uncertainty in system photometry mag. | real | 4 | mag | ERROR | |
| h_msigcom | twomass_psc | 2MASS | Combined, or total photometric uncertainty for the default H-band magnitude. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_msnr10 | twomass_scn | 2MASS | The estimated H-band magnitude at which SNR=10 is achieved for this scan. | real | 4 | mag | SPECT_FLUX_VALUE | |
| h_n_snr10 | twomass_scn | 2MASS | Number of point sources at H-band with SNR>10 (instrumental mag <=15.1) | int | 4 | NUMBER | ||
| h_pchi | twomass_xsc | 2MASS | H chi^2 of fit to rad. profile (LCSB: alpha scale len). | real | 4 | FIT_PARAM_VALUE | ||
| h_peak | twomass_xsc | 2MASS | H peak pixel brightness. | real | 4 | mag | PHOT_SB_GENERAL | |
| h_perc_darea | twomass_xsc | 2MASS | H 5-sigma to 3-sigma percent area change. | smallint | 2 | FIT_PARAM | ||
| h_phi | twomass_xsc | 2MASS | H angle to 3-sigma major axis (E of N). | smallint | 2 | degrees | POS_POS-ANG | |
| h_psfchi | twomass_psc | 2MASS | Reduced chi-squared goodness-of-fit value for the H-band profile-fit photometry made on the 1.3 s "Read_2" exposures. | real | 4 | FIT_PARAM_VALUE | ||
| h_psp | twomass_scn | 2MASS | H-band photometric sensitivity paramater (PSP). | real | 4 | INST_SENSITIVITY | ||
| h_pts_noise | twomass_scn | 2MASS | Base-10 logarithm of the mode of the noise distribution for all point source detections in the scan, where the noise is estimated from the measured H-band photometric errors and is expressed in units of mJy. | real | 4 | INST_NOISE | ||
| h_r_c | twomass_xsc | 2MASS | H Kron circular aperture radius. | real | 4 | arcsec | EXTENSION_RAD | |
| h_r_e | twomass_xsc | 2MASS | H Kron elliptical aperture semi-major axis. | real | 4 | arcsec | EXTENSION_RAD | |
| h_r_eff | twomass_xsc | 2MASS | H half-light (integrated half-flux point) radius. | real | 4 | arcsec | EXTENSION_RAD | |
| h_r_i20c | twomass_xsc | 2MASS | H 20mag/sq." isophotal circular aperture radius. | real | 4 | arcsec | EXTENSION_RAD | |
| h_r_i20e | twomass_xsc | 2MASS | H 20mag/sq." isophotal elliptical ap. semi-major axis. | real | 4 | arcsec | EXTENSION_RAD | |
| h_r_i21c | twomass_xsc | 2MASS | H 21mag/sq." isophotal circular aperture radius. | real | 4 | arcsec | EXTENSION_RAD | |
| h_r_i21e | twomass_xsc | 2MASS | H 21mag/sq." isophotal elliptical ap. semi-major axis. | real | 4 | arcsec | EXTENSION_RAD | |
| h_resid_ann | twomass_xsc | 2MASS | H residual annulus background median. | real | 4 | DN | CODE_MISC | |
| h_sc_1mm | twomass_xsc | 2MASS | H 1st moment (score) (LCSB: super blk 2,4,8 SNR). | real | 4 | CODE_MISC | ||
| h_sc_2mm | twomass_xsc | 2MASS | H 2nd moment (score) (LCSB: SNRMAX - super SNR max). | real | 4 | CODE_MISC | ||
| h_sc_msh | twomass_xsc | 2MASS | H median shape score. | real | 4 | CODE_MISC | ||
| h_sc_mxdn | twomass_xsc | 2MASS | H mxdn (score) (LCSB: BSNR - block/smoothed SNR). | real | 4 | CODE_MISC | ||
| h_sc_r1 | twomass_xsc | 2MASS | H r1 (score). | real | 4 | CODE_MISC | ||
| h_sc_r23 | twomass_xsc | 2MASS | H r23 (score) (LCSB: TSNR - integrated SNR for r=15). | real | 4 | CODE_MISC | ||
| h_sc_sh | twomass_xsc | 2MASS | H shape (score). | real | 4 | CODE_MISC | ||
| h_sc_vint | twomass_xsc | 2MASS | H vint (score). | real | 4 | CODE_MISC | ||
| h_sc_wsh | twomass_xsc | 2MASS | H wsh (score) (LCSB: PSNR - peak raw SNR). | real | 4 | CODE_MISC | ||
| h_seetrack | twomass_xsc | 2MASS | H band seetracking score. | real | 4 | CODE_MISC | ||
| h_sh0 | twomass_xsc | 2MASS | H ridge shape (LCSB: BSNR limit). | real | 4 | FIT_PARAM | ||
| h_shape_avg | twomass_scn | 2MASS | H-band average seeing shape for scan. | real | 4 | INST_SEEING | ||
| h_shape_rms | twomass_scn | 2MASS | RMS-error of H-band average seeing shape. | real | 4 | INST_SEEING | ||
| h_sig_sh0 | twomass_xsc | 2MASS | H ridge shape sigma (LCSB: B2SNR limit). | real | 4 | FIT_PARAM | ||
| h_snr | twomass_psc | 2MASS | H-band "scan" signal-to-noise ratio. | real | 4 | mag | INST_NOISE | |
| h_subst2 | twomass_xsc | 2MASS | H residual background #2 (score). | real | 4 | CODE_MISC | ||
| h_zp_ap | twomass_scn | 2MASS | Photometric zero-point for H-band aperture photometry. | real | 4 | mag | PHOT_ZP | |
| h_zperr_ap | twomass_scn | 2MASS | RMS-error of zero-point for H-band aperture photometry | real | 4 | mag | FIT_ERROR | |
| ha | twomass_scn | 2MASS | Hour angle at beginning of scan. | float | 8 | hr | POS_POS-ANG | |
| hallFlux | dxsDetection, dxsListRemeasurement, gcsDetection, gcsListRemeasurement, gpsDetection, gpsListRemeasurement, lasDetection, lasListRemeasurement, udsListRemeasurement | WSA | flux within circular aperture to k × r_h; k = 5; alternative total flux {catalogue TType keyword: Hall_flux} | real | 4 | ADU | PHOT_INTENSITY_ADU | |
| hallFlux | ptsDetection | WSATransit | flux within circular aperture to k × r_h; k = 5; alternative total flux {catalogue TType keyword: Hall_flux} | real | 4 | ADU | PHOT_INTENSITY_ADU | |
| hallFlux | udsDetection | WSA | Not available in SE output {catalogue TType keyword: Hall_flux} | real | 4 | -0.9999995e9 | ||
| hallFluxErr | dxsDetection, dxsListRemeasurement, gcsDetection, gcsListRemeasurement, gpsDetection, gpsListRemeasurement, lasDetection, lasListRemeasurement, udsListRemeasurement | WSA | error on Hall flux {catalogue TType keyword: Hall_flux_err} | real | 4 | ADU | ERROR | |
| hallFluxErr | ptsDetection | WSATransit | error on Hall flux {catalogue TType keyword: Hall_flux_err} | real | 4 | ADU | ERROR | |
| hallFluxErr | udsDetection | WSA | Not available in SE output {catalogue TType keyword: Hall_flux_err} | real | 4 | -0.9999995e9 | ||
| hallMag | dxsDetection, dxsListRemeasurement, gcsDetection, gcsListRemeasurement, gpsDetection, gpsListRemeasurement, lasDetection, lasListRemeasurement, udsListRemeasurement | WSA | Calibrated magnitude within circular aperture r_hall | real | 4 | mag | PHOT_INT-MAG | |
| hallMag | ptsDetection | WSATransit | Calibrated magnitude within circular aperture r_hall | real | 4 | mag | PHOT_INT-MAG | |
| hallMag | udsDetection | WSA | Not available in SE output | real | 4 | -0.9999995e9 | ||
| hallMagErr | dxsDetection, dxsListRemeasurement, gcsDetection, gcsListRemeasurement, gpsDetection, gpsListRemeasurement, lasDetection, lasListRemeasurement, udsListRemeasurement | WSA | Calibrated error on Hall magnitude | real | 4 | mag | ERROR | |
| hallMagErr | ptsDetection | WSATransit | Calibrated error on Hall magnitude | real | 4 | mag | ERROR | |
| hallMagErr | udsDetection | WSA | Not available in SE output | real | 4 | -0.9999995e9 | ||
| hallRad | dxsDetection, dxsListRemeasurement, gcsDetection, gcsListRemeasurement, gpsDetection, gpsListRemeasurement, lasDetection, lasListRemeasurement, udsListRemeasurement | WSA | r_h image scale radius eg. Hall & Mackay 1984 MNRAS 210 979 {catalogue TType keyword: Hall_radius} | real | 4 | pixels | EXTENSION_RAD | |
| hallRad | ptsDetection | WSATransit | r_h image scale radius eg. Hall & Mackay 1984 MNRAS 210 979 {catalogue TType keyword: Hall_radius} | real | 4 | pixels | EXTENSION_RAD | |
| hallRad | udsDetection | WSA | Not available in SE output {catalogue TType keyword: Hall_radius} | real | 4 | -0.9999995e9 | ||
| haloRadius | JunkDetection | SSA | Vertical half-major axis of halo ellipse | real | 4 | arcsec | 0.0 | EXTENSION_RAD |
| hAperMag3 | dxsSource, gcsSource, gpsSource, lasSource | WSA | Default point/extended source H aperture corrected mag (2.0 arcsec aperture diameter) If in doubt use this flux estimator |
real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hAperMag3 | udsSource | WSA | Default point/extended source H mag, no aperture correction applied If in doubt use this flux estimator |
real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hAperMag3Err | dxsSource, gcsSource, gpsSource, lasSource, udsSource | WSA | Error in default point/extended source H mag (2.0 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| hAperMag4 | dxsSource, gcsSource, gpsSource, lasSource | WSA | Extended source H aperture corrected mag (2.8 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hAperMag4 | udsSource | WSA | Extended source H mag, no aperture correction applied | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hAperMag4Err | dxsSource, gcsSource, gpsSource, lasSource, udsSource | WSA | Error in extended source H mag (2.8 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| hAperMag6 | dxsSource, gcsSource, gpsSource, lasSource | WSA | Extended source H aperture corrected mag (5.7 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hAperMag6 | udsSource | WSA | Extended source H mag, no aperture correction applied | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hAperMag6Err | dxsSource, gcsSource, gpsSource, lasSource, udsSource | WSA | Error in extended source H mag (5.7 arcsec aperture diameter) | real | 4 | mag | -0.9999995e9 | ERROR |
| hClass | dxsSource, dxsSourceRemeasurement, gcsSource, gcsSourceRemeasurement, gpsSource, gpsSourceRemeasurement, lasSource, lasSourceRemeasurement, udsSource, udsSourceRemeasurement | WSA | discrete image classification flag in H | smallint | 2 | -9999 | CLASS_MISC | |
| hClassStat | dxsSource, dxsSourceRemeasurement, gcsSource, gcsSourceRemeasurement, gpsSource, gpsSourceRemeasurement, lasSource, lasSourceRemeasurement, udsSourceRemeasurement | WSA | N(0,1) stellarness-of-profile statistic in H | real | 4 | -0.9999995e9 | STAT_PROP | |
| hClassStat | udsSource | WSA | S-Extractor classification statistic in H | real | 4 | -0.9999995e9 | STAT_PROP | |
| hDeblend | dxsSource, dxsSourceRemeasurement, gcsSource, gcsSourceRemeasurement, gpsSource, gpsSourceRemeasurement, lasSource, lasSourceRemeasurement, udsSource, udsSourceRemeasurement | WSA | flag indicating parent/child relation in H | int | 4 | -99999999 | CODE_MISC | |
| hdtFile | Multiframe | WSA | Name of global hdt file {image primary HDU keyword: HDTFILE} | varchar | 32 | NONE | ||
| hdtFile | Multiframe | WSATransit | Name of global hdt file {image primary HDU keyword: HDTFILE} | varchar | 32 | NONE | ||
| hdtFileExt | MultiframeDetector | WSA | Name of camera-specific hdt file {image extension keyword: HDTFILE2} | varchar | 32 | NONE | ?? | |
| hdtFileExt | MultiframeDetector | WSATransit | Name of camera-specific hdt file {image extension keyword: HDTFILE2} | varchar | 32 | NONE | ?? | |
| hEll | dxsSource, dxsSourceRemeasurement, gcsSource, gcsSourceRemeasurement, gpsSource, gpsSourceRemeasurement, lasSource, lasSourceRemeasurement, udsSource, udsSourceRemeasurement | WSA | 1-b/a, where a/b=semi-major/minor axes in H | real | 4 | -0.9999995e9 | PHYS_ELLIPTICITY | |
| hemis | twomass_psc | 2MASS | Hemisphere code for the TWOMASS Observatory from which this source was observed. | varchar | 1 | OBS_CODE | ||
| hemis | twomass_scn | 2MASS | Observatory from which data were obtained: "n" = north = Mt. Hopkins, "s" = south = Cerro Tololo. | varchar | 1 | OBS_CODE | ||
| hemis | twomass_xsc | 2MASS | hemisphere (N/S) of observation. "n" = North/Mt. Hopkins; "s" = South/CTIO. | varchar | 1 | OBS_CODE | ||
| heNum | dxsMergeLog, gcsMergeLog, gpsMergeLog, lasMergeLog, udsMergeLog | WSA | the extension number of this H frame | tinyint | 1 | NUMBER | ||
| hErrBits | dxsSource, dxsSourceRemeasurement, gcsSource, gcsSourceRemeasurement, gpsSource, gpsSourceRemeasurement, lasSource, lasSourceRemeasurement, udsSource, udsSourceRemeasurement | WSA | processing warning/error bitwise flags in H | int | 4 | -99999999 | CODE_MISC | |
| hEta | dxsSource, gcsSource, gpsSource, lasSource, udsSource | WSA | Offset of H detection from master position (+north/-south) | real | 4 | arcsec | -0.9999995e9 | POS_EQ_DEC_OFF |
| When associating individual passband detections into merged sources, a generous (in terms of the positional uncertainties) pairing radius of 2.0 (UKIDSS LAS and GPS; also non-survey programmes) or 1.0 (UKIDSS GPS, DXS and UDS) arcseconds is used, the higher value enabling pairing of moving sources when epoch separations may be several years. Such a large association criterion can of course lead to spurious pairings in the merged sources lists (although note that between passband pairs, handshake pairing is done: both passbands must agree that the candidate pair is their nearest neighbour for the pair to propagate through into the merged source table). In order to help filter spurious pairings out, and assuming that large positional offsets between the different passband detections are not expected (e.g. because of source motion, or larger than usual positional uncertainties) then the attributes Xi and Eta can be used to filter any pairings with suspiciously large offsets in one or more bands. For example, for a clean sample of QSOs from the LAS, you might wish to insist that the offsets in the selected sample are all below 1 arcsecond: simply add WHERE clauses into the SQL sample selection script to exclude all Xi and Eta values larger than the threshold you want. | ||||||||
| hGausig | dxsSource, dxsSourceRemeasurement, gcsSource, gcsSourceRemeasurement, gpsSource, gpsSourceRemeasurement, lasSource, lasSourceRemeasurement, udsSource, udsSourceRemeasurement | WSA | RMS of axes of ellipse fit in H | real | 4 | pixels | -0.9999995e9 | MORPH_PARAM |
| hgl | twomass_scn | 2MASS | Special flag indicating whether or not this scan has a single-frame H-band electronic glitch. | smallint | 2 | CODE_MISC | ||
| hHallMag | dxsSource, gcsSource, gpsSource, lasSource | WSA | Total point source H mag | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hHallMag | udsSource | WSA | Not available in SE output | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hHallMagErr | dxsSource, gcsSource, gpsSource, lasSource | WSA | Error in total point source H mag | real | 4 | mag | -0.9999995e9 | ERROR |
| hHallMagErr | udsSource | WSA | Not available in SE output | real | 4 | mag | -0.9999995e9 | ERROR |
| hMag | CurrentStdStarInfo, PreviousStdStarInfo | WSA | H band total magnitude of star (from external sources if primary) | real | 4 | mag | PHOT_INT-MAG | |
| hMag | dxsSourceRemeasurement, gcsSourceRemeasurement, gpsSourceRemeasurement, lasSourceRemeasurement, udsSourceRemeasurement | WSA | H mag (as appropriate for this merged source) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hMagErr | CurrentStdStarInfo, PreviousStdStarInfo | WSA | H band magnitude error of star | real | 4 | mag | ERROR | |
| hMagErr | dxsSourceRemeasurement, gcsSourceRemeasurement, gpsSourceRemeasurement, lasSourceRemeasurement, udsSourceRemeasurement | WSA | Error in H mag | real | 4 | mag | -0.9999995e9 | ERROR |
| hmfID | dxsMergeLog, gcsMergeLog, gpsMergeLog, lasMergeLog, udsMergeLog | WSA | the UID of the relevant H multiframe | bigint | 8 | ID_FRAME | ||
| hmk | dxsSourceRemeasurement, lasSourceRemeasurement, udsSourceRemeasurement | WSA | Default colour H-K (using appropriate mags) | real | 4 | mag | PHOT_COLOR | |
| hmk_1 | gcsSourceRemeasurement, gpsSourceRemeasurement | WSA | Default colour H-K (using appropriate mags) | real | 4 | mag | PHOT_COLOR | |
| hmk_1Err | gcsSourceRemeasurement, gpsSourceRemeasurement | WSA | Error on colour H-K | real | 4 | mag | ERROR | |
| hmk_1Ext | gcsSource, gpsSource | WSA | Extended source colour H-K (using aperMag3) | real | 4 | mag | -0.9999995e9 | PHOT_COLOR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| hmk_1ExtErr | gcsSource, gpsSource | WSA | Error on extended source colour H-K | real | 4 | mag | -0.9999995e9 | ERROR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| hmk_1Pnt | gcsSource, gpsSource | WSA | Point source colour H-K (using aperMag3) | real | 4 | mag | -0.9999995e9 | PHOT_COLOR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| hmk_1PntErr | gcsSource, gpsSource | WSA | Error on point source colour H-K | real | 4 | mag | -0.9999995e9 | ERROR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| hmkErr | dxsSourceRemeasurement, lasSourceRemeasurement, udsSourceRemeasurement | WSA | Error on colour H-K | real | 4 | mag | ERROR | |
| hmkExt | dxsSource, lasSource, udsSource | WSA | Extended source colour H-K (using aperMag3) | real | 4 | mag | -0.9999995e9 | PHOT_COLOR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| hmkExtErr | dxsSource, lasSource, udsSource | WSA | Error on extended source colour H-K | real | 4 | mag | -0.9999995e9 | ERROR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| hmkPnt | dxsSource, lasSource, udsSource | WSA | Point source colour H-K (using aperMag3) | real | 4 | mag | -0.9999995e9 | PHOT_COLOR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| hmkPntErr | dxsSource, lasSource, udsSource | WSA | Error on point source colour H-K | real | 4 | mag | -0.9999995e9 | ERROR |
| Default colours from pairs of adjacent passbands within a given set (e.g. Y-J, J-H and H-K for YJHK) are recorded in the merged source table for ease of querying and speedy querying via indexing of these attributes. Presently, the point-source colours and extended source colours are computed from the aperture corrected AperMag3 fixed 2 arcsec aperture diameter measures (for consistent measurement across all passbands) and generally good signal-to-noise. At some point in the future, this may be changed such that point-source colours will be computed from the PSF-fitted measures and extended source colours computed from the 2-d Sersic model profile fits. | ||||||||
| hObjID | dxsSource, gcsSource, gpsSource, lasSource, udsSource | WSA | the UID of the H detection | bigint | 8 | -99999999 | ID_NUMBER | |
| hObjID | dxsSourceRemeasurement, gcsSourceRemeasurement, gpsSourceRemeasurement, lasSourceRemeasurement, udsSourceRemeasurement | WSA | the UID of the H remeasurement | bigint | 8 | -99999999 | ID_NUMBER | |
| hourAngle | Multiframe | WSA | Hour angle {image primary HDU keyword: HABASE} | real | 4 | degrees | -0.9999995e9 | |
| hourAngle | Multiframe | WSATransit | Hour angle {image primary HDU keyword: HABASE} | real | 4 | degrees | -0.9999995e9 | |
| hPA | dxsSource, dxsSourceRemeasurement, gcsSource, gcsSourceRemeasurement, gpsSource, gpsSourceRemeasurement, lasSource, lasSourceRemeasurement, udsSource, udsSourceRemeasurement | WSA | ellipse fit celestial orientation in H | real | 4 | Degrees | -0.9999995e9 | POS_POS-ANG |
| hPetroMag | dxsSource, gcsSource, gpsSource, lasSource, udsSource | WSA | Extended source H mag (Petrosian) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hPetroMagErr | dxsSource, gcsSource, gpsSource, lasSource, udsSource | WSA | Error in extended source H mag (Petrosian) | real | 4 | mag | -0.9999995e9 | ERROR |
| hppErrBits | dxsSource, dxsSourceRemeasurement, gcsSource, gcsSourceRemeasurement, gpsSource, gpsSourceRemeasurement, lasSource, lasSourceRemeasurement, udsSource, udsSourceRemeasurement | WSA | additional WFAU post-processing error bits in H | int | 4 | 0 | CODE_MISC | |
| hPsfMag | dxsSource, gcsSource, gpsSource, lasSource | WSA | Point source profile-fitted H mag | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hPsfMag | udsSource | WSA | Not available in SE output | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hPsfMagErr | dxsSource, gcsSource, gpsSource, lasSource | WSA | Error in point source profile-fitted H mag | real | 4 | mag | -0.9999995e9 | ERROR |
| hPsfMagErr | udsSource | WSA | Not available in SE output | real | 4 | mag | -0.9999995e9 | ERROR |
| hr1 | rosat_bsc, rosat_fsc | ROSAT | hardness ratio 1 | float | 8 | SPECT_HARDNESS-RATIO | ||
| hr2 | rosat_bsc, rosat_fsc | ROSAT | hardness ratio 2 | float | 8 | SPECT_HARDNESS-RATIO | ||
| hry | twomass_scn | 2MASS | Flag indicating the H-band array configuration for the camera. | smallint | 2 | CODE_MISC | ||
| hsdFlag_100 | iras_psc | IRAS | Source is located in high source density bin (100 micron). | tinyint | 1 | REMARKS | ||
| hsdFlag_12 | iras_psc | IRAS | Source is located in high source density bin (12 micron). | tinyint | 1 | REMARKS | ||
| hsdFlag_25 | iras_psc | IRAS | Source is located in high source density bin (25 micron). | tinyint | 1 | REMARKS | ||
| hsdFlag_60 | iras_psc | IRAS | Source is located in high source density bin (60 micron). | tinyint | 1 | REMARKS | ||
| hSeqNum | dxsSource, gcsSource, gpsSource, lasSource, udsSource | WSA | the running number of the H detection | int | 4 | -99999999 | ID_NUMBER | |
| hSeqNum | dxsSourceRemeasurement, gcsSourceRemeasurement, gpsSourceRemeasurement, lasSourceRemeasurement, udsSourceRemeasurement | WSA | the running number of the H remeasurement | int | 4 | -99999999 | ID_NUMBER | |
| hSerMag2D | dxsSource, gcsSource, gpsSource, lasSource | WSA | Extended source H mag (profile-fitted) | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hSerMag2D | udsSource | WSA | Not available in SE output | real | 4 | mag | -0.9999995e9 | PHOT_MAG |
| hSerMag2DErr | dxsSource, gcsSource, gpsSource, lasSource | WSA | Error in extended source H mag (profile-fitted) | real | 4 | mag | -0.9999995e9 | ERROR |
| hSerMag2DErr | udsSource | WSA | Not available in SE output | real | 4 | mag | -0.9999995e9 | ERROR |
| htmID | CurrentAstrometry | WSATransit | Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates of device centre | bigint | 8 | POS_GENERAL | ||
| htmID | CurrentAstrometry, PreviousAstrometry | WSA | Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates of device centre | bigint | 8 | POS_GENERAL | ||
| htmID | CurrentStdStarInfo, dxsDetection, dxsListRemeasurement, dxsMergeLog, dxsSource, dxsSourceRemeasurement, gcsDetection, gcsListRemeasurement, gcsMergeLog, gcsSource, gcsSourceRemeasurement, gpsDetection, gpsListRemeasurement, gpsMergeLog, gpsSource, gpsSourceRemeasurement, lasDetection, lasListRemeasurement, lasMergeLog, lasSource, lasSourceRemeasurement, PreviousStdStarInfo, udsDetection, udsListRemeasurement, udsMergeLog, udsSource, udsSourceRemeasurement | WSA | Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates | bigint | 8 | POS_GENERAL | ||
| htmID | firstSource | FIRST | Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates | bigint | 8 | POS_GENERAL | ||
| htmID | glimpse_hrc_inter, glimpse_mca_inter | GLIMPSE | Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates | bigint | 8 | POS_GENERAL | ||
| htmID | iras_psc | IRAS | Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates | bigint | 8 | POS_GENERAL | ||
| htmID | ptsDetection | WSATransit | Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates | bigint | 8 | POS_GENERAL | ||
| htmID | rosat_bsc, rosat_fsc | ROSAT | Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates | bigint | 8 | POS_GENERAL | ||
| htmID | twomass_psc, twomass_scn, twomass_xsc | 2MASS | Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates | bigint | 8 | POS_GENERAL | ||
| htmId | Detection, Source | SSA | Hierarchical Triangular Mesh (20-deep) of centroid | bigint | 8 | POS_GENERAL | ||
| htmId | Field | SSA | Hierarchical Triangular Mesh (20-deep) of nominal field centre | bigint | 8 | POS_GENERAL | ||
| humidity | Multiframe | WSA | Relative Humidity {image primary HDU keyword: HUMIDITY} | real | 4 | -0.9999995e9 | OBS_CONDITIONS | |
| humidity | Multiframe | WSATransit | Relative Humidity {image primary HDU keyword: HUMIDITY} | real | 4 | -0.9999995e9 | OBS_CONDITIONS | |
| hXi | dxsSource, gcsSource, gpsSource, lasSource, udsSource | WSA | Offset of H detection from master position (+east/-west) | real | 4 | arcsec | -0.9999995e9 | POS_EQ_RA_OFF |
| When associating individual passband detections into merged sources, a generous (in terms of the positional uncertainties) pairing radius of 2.0 (UKIDSS LAS and GPS; also non-survey programmes) or 1.0 (UKIDSS GPS, DXS and UDS) arcseconds is used, the higher value enabling pairing of moving sources when epoch separations may be several years. Such a large association criterion can of course lead to spurious pairings in the merged sources lists (although note that between passband pairs, handshake pairing is done: both passbands must agree that the candidate pair is their nearest neighbour for the pair to propagate through into the merged source table). In order to help filter spurious pairings out, and assuming that large positional offsets between the different passband detections are not expected (e.g. because of source motion, or larger than usual positional uncertainties) then the attributes Xi and Eta can be used to filter any pairings with suspiciously large offsets in one or more bands. For example, for a clean sample of QSOs from the LAS, you might wish to insist that the offsets in the selected sample are all below 1 arcsecond: simply add WHERE clauses into the SQL sample selection script to exclude all Xi and Eta values larger than the threshold you want. | ||||||||
| hz10cd | Multiframe | WSA | Trefoil: HZ10CD {image primary HDU keyword: HZ10CD} | real | 4 | -0.9999995e9 | ||
| hz10cd | Multiframe | WSATransit | Trefoil: HZ10CD {image primary HDU keyword: HZ10CD} | real | 4 | -0.9999995e9 | ||
| hz10ch | Multiframe | WSA | Trefoil: HZ10CH {image primary HDU keyword: HZ10CH} | real | 4 | -0.9999995e9 | ||
| hz10ch | Multiframe | WSATransit | Trefoil: HZ10CH {image primary HDU keyword: HZ10CH} | real | 4 | -0.9999995e9 | ||
| hz10sd | Multiframe | WSA | Trefoil: HZ10SD {image primary HDU keyword: HZ10SD} | real | 4 | -0.9999995e9 | ||
| hz10sd | Multiframe | WSATransit | Trefoil: HZ10SD {image primary HDU keyword: HZ10SD} | real | 4 | -0.9999995e9 | ||
| hz10sh | Multiframe | WSA | Trefoil: HZ10SH {image primary HDU keyword: HZ10SH} | real | 4 | -0.9999995e9 | ||
| hz10sh | Multiframe | WSATransit | Trefoil: HZ10SH {image primary HDU keyword: HZ10SH} | real | 4 | -0.9999995e9 | ||
| hz5cd | Multiframe | WSA | Astigmatism: HZ5CD {image primary HDU keyword: HZ5CD} | real | 4 | -0.9999995e9 | ||
| hz5cd | Multiframe | WSATransit | Astigmatism: HZ5CD {image primary HDU keyword: HZ5CD} | real | 4 | -0.9999995e9 | ||
| hz5ch | Multiframe | WSA | Astigmatism: HZ5CH {image primary HDU keyword: HZ5CH} | real | 4 | -0.9999995e9 | ||
| hz5ch | Multiframe | WSATransit | Astigmatism: HZ5CH {image primary HDU keyword: HZ5CH} | real | 4 | -0.9999995e9 | ||
| hz5sd | Multiframe | WSA | Astigmatism: HZ5SD {image primary HDU keyword: HZ5SD} | real | 4 | -0.9999995e9 | ||
| hz5sd | Multiframe | WSATransit | Astigmatism: HZ5SD {image primary HDU keyword: HZ5SD} | real | 4 | -0.9999995e9 | ||
| hz5sh | Multiframe | WSA | Astigmatism: HZ5SH {image primary HDU keyword: HZ5SH} | real | 4 | -0.9999995e9 | ||
| hz5sh | Multiframe | WSATransit | Astigmatism: HZ5SH {image primary HDU keyword: HZ5SH} | real | 4 | -0.9999995e9 | ||
| hz6cd | Multiframe | WSA | Astigmatism: HZ6CD {image primary HDU keyword: HZ6CD} | real | 4 | -0.9999995e9 | ||
| hz6cd | Multiframe | WSATransit | Astigmatism: HZ6CD {image primary HDU keyword: HZ6CD} | real | 4 | -0.9999995e9 | ||
| hz6ch | Multiframe | WSA | Astigmatism: HZ6CH {image primary HDU keyword: HZ6CH} | real | 4 | -0.9999995e9 | ||
| hz6ch | Multiframe | WSATransit | Astigmatism: HZ6CH {image primary HDU keyword: HZ6CH} | real | 4 | -0.9999995e9 | ||
| hz6sd | Multiframe | WSA | Astigmatism: HZ6SD {image primary HDU keyword: HZ6SD} | real | 4 | -0.9999995e9 | ||
| hz6sd | Multiframe | WSATransit | Astigmatism: HZ6SD {image primary HDU keyword: HZ6SD} | real | 4 | -0.9999995e9 | ||
| hz6sh | Multiframe | WSA | Astigmatism: HZ6SH {image primary HDU keyword: HZ6SH} | real | 4 | -0.9999995e9 | ||
| hz6sh | Multiframe | WSATransit | Astigmatism: HZ6SH {image primary HDU keyword: HZ6SH} | real | 4 | -0.9999995e9 | ||
| hz9cd | Multiframe | WSA | Trefoil: HZ9CD {image primary HDU keyword: HZ9CD} | real | 4 | -0.9999995e9 | ||
| hz9cd | Multiframe | WSATransit | Trefoil: HZ9CD {image primary HDU keyword: HZ9CD} | real | 4 | -0.9999995e9 | ||
| hz9ch | Multiframe | WSA | Trefoil: HZ9CH {image primary HDU keyword: HZ9CH} | real | 4 | -0.9999995e9 | ||
| hz9ch | Multiframe | WSATransit | Trefoil: HZ9CH {image primary HDU keyword: HZ9CH} | real | 4 | -0.9999995e9 | ||
| hz9sd | Multiframe | WSA | Trefoil: HZ9SD {image primary HDU keyword: HZ9SD} | real | 4 | -0.9999995e9 | ||
| hz9sd | Multiframe | WSATransit | Trefoil: HZ9SD {image primary HDU keyword: HZ9SD} | real | 4 | -0.9999995e9 | ||
| hz9sh | Multiframe | WSA | Trefoil: HZ9SH {image primary HDU keyword: HZ9SH} | real | 4 | -0.9999995e9 | ||
| hz9sh | Multiframe | WSATransit | Trefoil: HZ9SH {image primary HDU keyword: HZ9SH} | real | 4 | -0.9999995e9 | ||