K |
Name | Schema Table | Database | Description | Type | Length | Unit | Default Value | Unified Content Descriptor |
k_1AperMag3 |
[nspid]Source |
WSA NonSurvey |
Default point/extended source K_1 mag (2.0 arcsec aperture diameter) If in doubt use this flux estimator |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_1AperMag3Err |
[nspid]Source |
WSA NonSurvey |
Error in default point/extended source K_1 mag (2.0 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_1AperMag4 |
[nspid]Source |
WSA NonSurvey |
Extended source K_1 mag (2.8 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_1AperMag4Err |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_1 mag (2.8 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_1AperMag6 |
[nspid]Source |
WSA NonSurvey |
Extended source K_1 mag (5.7 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_1AperMag6Err |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_1 mag (5.7 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_1Class |
[nspid]Source |
WSA NonSurvey |
discrete image classification flag in K_1 |
smallint |
2 |
|
-9999 |
CLASS_MISC |
k_1ClassStat |
[nspid]Source |
WSA NonSurvey |
N(0,1) stellarness-of-profile statistic in K_1 |
real |
4 |
|
-0.9999995e9 |
STAT_PROP |
k_1Deblend |
[nspid]Source |
WSA NonSurvey |
flag indicating parent/child relation in K_1 |
int |
4 |
|
-99999999 |
CODE_MISC |
k_1Ell |
[nspid]Source |
WSA NonSurvey |
1-b/a, where a/b=semi-major/minor axes in K_1 |
real |
4 |
|
-0.9999995e9 |
PHYS_ELLIPTICITY |
k_1eNum |
[nspid]MergeLog |
WSA NonSurvey |
the extension number of this K_1 detector |
tinyint |
1 |
|
|
NUMBER |
k_1ErrBits |
[nspid]Source |
WSA NonSurvey |
processing warning/error bitwise flags in K_1 |
int |
4 |
|
-99999999 |
CODE_MISC |
k_1Eta |
[nspid]Source |
WSA NonSurvey |
Offset of K_1 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. |
k_1Gausig |
[nspid]Source |
WSA NonSurvey |
RMS of axes of ellipse fit in K_1 |
real |
4 |
pixels |
-0.9999995e9 |
MORPH_PARAM |
k_1HallMag |
[nspid]Source |
WSA NonSurvey |
Total point source K_1 mag |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_1HallMagErr |
[nspid]Source |
WSA NonSurvey |
Error in total point source K_1 mag |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_1mfID |
[nspid]MergeLog |
WSA NonSurvey |
the UID of the relevant K_1 multiframe |
bigint |
8 |
|
|
ID_FRAME |
k_1ObjID |
[nspid]Source |
WSA NonSurvey |
the UID of the K_1 detection |
bigint |
8 |
|
-99999999 |
ID_NUMBER |
k_1PA |
[nspid]Source |
WSA NonSurvey |
ellipse fit celestial orientation in K_1 |
real |
4 |
Degrees |
-0.9999995e9 |
POS_POS-ANG |
k_1PetroMag |
[nspid]Source |
WSA NonSurvey |
Extended source K_1 mag (Petrosian) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_1PetroMagErr |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_1 mag (Petrosian) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_1ppErrBits |
[nspid]Source |
WSA NonSurvey |
additional WFAU post-processing error bits in K_1 |
int |
4 |
|
-99999999 |
CODE_MISC |
k_1PsfMag |
[nspid]Source |
WSA NonSurvey |
Point source profile-fitted K_1 mag |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_1PsfMagErr |
[nspid]Source |
WSA NonSurvey |
Error in point source profile-fitted K_1 mag |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_1SeqNum |
[nspid]Source |
WSA NonSurvey |
the running number of the K_1 detection |
int |
4 |
|
-99999999 |
ID_NUMBER |
k_1SerMag2D |
[nspid]Source |
WSA NonSurvey |
Extended source K_1 mag (profile-fitted) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_1SerMag2DErr |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_1 mag (profile-fitted) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_1Xi |
[nspid]Source |
WSA NonSurvey |
Offset of K_1 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. |
k_2AperMag3 |
[nspid]Source |
WSA NonSurvey |
Default point/extended source K_2 mag (2.0 arcsec aperture diameter) If in doubt use this flux estimator |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_2AperMag3Err |
[nspid]Source |
WSA NonSurvey |
Error in default point/extended source K_2 mag (2.0 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_2AperMag4 |
[nspid]Source |
WSA NonSurvey |
Extended source K_2 mag (2.8 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_2AperMag4Err |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_2 mag (2.8 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_2AperMag6 |
[nspid]Source |
WSA NonSurvey |
Extended source K_2 mag (5.7 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_2AperMag6Err |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_2 mag (5.7 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_2Class |
[nspid]Source |
WSA NonSurvey |
discrete image classification flag in K_2 |
smallint |
2 |
|
-9999 |
CLASS_MISC |
k_2ClassStat |
[nspid]Source |
WSA NonSurvey |
N(0,1) stellarness-of-profile statistic in K_2 |
real |
4 |
|
-0.9999995e9 |
STAT_PROP |
k_2Deblend |
[nspid]Source |
WSA NonSurvey |
flag indicating parent/child relation in K_2 |
int |
4 |
|
-99999999 |
CODE_MISC |
k_2Ell |
[nspid]Source |
WSA NonSurvey |
1-b/a, where a/b=semi-major/minor axes in K_2 |
real |
4 |
|
-0.9999995e9 |
PHYS_ELLIPTICITY |
k_2eNum |
[nspid]MergeLog |
WSA NonSurvey |
the extension number of this K_2 detector |
tinyint |
1 |
|
|
NUMBER |
k_2ErrBits |
[nspid]Source |
WSA NonSurvey |
processing warning/error bitwise flags in K_2 |
int |
4 |
|
-99999999 |
CODE_MISC |
k_2Eta |
[nspid]Source |
WSA NonSurvey |
Offset of K_2 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. |
k_2Gausig |
[nspid]Source |
WSA NonSurvey |
RMS of axes of ellipse fit in K_2 |
real |
4 |
pixels |
-0.9999995e9 |
MORPH_PARAM |
k_2HallMag |
[nspid]Source |
WSA NonSurvey |
Total point source K_2 mag |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_2HallMagErr |
[nspid]Source |
WSA NonSurvey |
Error in total point source K_2 mag |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_2mfID |
[nspid]MergeLog |
WSA NonSurvey |
the UID of the relevant K_2 multiframe |
bigint |
8 |
|
|
ID_FRAME |
k_2ObjID |
[nspid]Source |
WSA NonSurvey |
the UID of the K_2 detection |
bigint |
8 |
|
-99999999 |
ID_NUMBER |
k_2PA |
[nspid]Source |
WSA NonSurvey |
ellipse fit celestial orientation in K_2 |
real |
4 |
Degrees |
-0.9999995e9 |
POS_POS-ANG |
k_2PetroMag |
[nspid]Source |
WSA NonSurvey |
Extended source K_2 mag (Petrosian) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_2PetroMagErr |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_2 mag (Petrosian) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_2ppErrBits |
[nspid]Source |
WSA NonSurvey |
additional WFAU post-processing error bits in K_2 |
int |
4 |
|
-99999999 |
CODE_MISC |
k_2PsfMag |
[nspid]Source |
WSA NonSurvey |
Point source profile-fitted K_2 mag |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_2PsfMagErr |
[nspid]Source |
WSA NonSurvey |
Error in point source profile-fitted K_2 mag |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_2SeqNum |
[nspid]Source |
WSA NonSurvey |
the running number of the K_2 detection |
int |
4 |
|
-99999999 |
ID_NUMBER |
k_2SerMag2D |
[nspid]Source |
WSA NonSurvey |
Extended source K_2 mag (profile-fitted) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_2SerMag2DErr |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_2 mag (profile-fitted) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_2Xi |
[nspid]Source |
WSA NonSurvey |
Offset of K_2 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. |
k_3AperMag3 |
[nspid]Source |
WSA NonSurvey |
Default point/extended source K_3 mag (2.0 arcsec aperture diameter) If in doubt use this flux estimator |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_3AperMag3Err |
[nspid]Source |
WSA NonSurvey |
Error in default point/extended source K_3 mag (2.0 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_3AperMag4 |
[nspid]Source |
WSA NonSurvey |
Extended source K_3 mag (2.8 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_3AperMag4Err |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_3 mag (2.8 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_3AperMag6 |
[nspid]Source |
WSA NonSurvey |
Extended source K_3 mag (5.7 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_3AperMag6Err |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_3 mag (5.7 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_3Class |
[nspid]Source |
WSA NonSurvey |
discrete image classification flag in K_3 |
smallint |
2 |
|
-9999 |
CLASS_MISC |
k_3ClassStat |
[nspid]Source |
WSA NonSurvey |
N(0,1) stellarness-of-profile statistic in K_3 |
real |
4 |
|
-0.9999995e9 |
STAT_PROP |
k_3Deblend |
[nspid]Source |
WSA NonSurvey |
flag indicating parent/child relation in K_3 |
int |
4 |
|
-99999999 |
CODE_MISC |
k_3Ell |
[nspid]Source |
WSA NonSurvey |
1-b/a, where a/b=semi-major/minor axes in K_3 |
real |
4 |
|
-0.9999995e9 |
PHYS_ELLIPTICITY |
k_3eNum |
[nspid]MergeLog |
WSA NonSurvey |
the extension number of this K_3 detector |
tinyint |
1 |
|
|
NUMBER |
k_3ErrBits |
[nspid]Source |
WSA NonSurvey |
processing warning/error bitwise flags in K_3 |
int |
4 |
|
-99999999 |
CODE_MISC |
k_3Eta |
[nspid]Source |
WSA NonSurvey |
Offset of K_3 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. |
k_3Gausig |
[nspid]Source |
WSA NonSurvey |
RMS of axes of ellipse fit in K_3 |
real |
4 |
pixels |
-0.9999995e9 |
MORPH_PARAM |
k_3HallMag |
[nspid]Source |
WSA NonSurvey |
Total point source K_3 mag |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_3HallMagErr |
[nspid]Source |
WSA NonSurvey |
Error in total point source K_3 mag |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_3mfID |
[nspid]MergeLog |
WSA NonSurvey |
the UID of the relevant K_3 multiframe |
bigint |
8 |
|
|
ID_FRAME |
k_3ObjID |
[nspid]Source |
WSA NonSurvey |
the UID of the K_3 detection |
bigint |
8 |
|
-99999999 |
ID_NUMBER |
k_3PA |
[nspid]Source |
WSA NonSurvey |
ellipse fit celestial orientation in K_3 |
real |
4 |
Degrees |
-0.9999995e9 |
POS_POS-ANG |
k_3PetroMag |
[nspid]Source |
WSA NonSurvey |
Extended source K_3 mag (Petrosian) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_3PetroMagErr |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_3 mag (Petrosian) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_3ppErrBits |
[nspid]Source |
WSA NonSurvey |
additional WFAU post-processing error bits in K_3 |
int |
4 |
|
-99999999 |
CODE_MISC |
k_3PsfMag |
[nspid]Source |
WSA NonSurvey |
Point source profile-fitted K_3 mag |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_3PsfMagErr |
[nspid]Source |
WSA NonSurvey |
Error in point source profile-fitted K_3 mag |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_3SeqNum |
[nspid]Source |
WSA NonSurvey |
the running number of the K_3 detection |
int |
4 |
|
-99999999 |
ID_NUMBER |
k_3SerMag2D |
[nspid]Source |
WSA NonSurvey |
Extended source K_3 mag (profile-fitted) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
k_3SerMag2DErr |
[nspid]Source |
WSA NonSurvey |
Error in extended source K_3 mag (profile-fitted) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
k_3Xi |
[nspid]Source |
WSA NonSurvey |
Offset of K_3 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. |
kAperMag3 |
[nspid]Source |
WSA NonSurvey |
Extended source K mag (2.0 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kAperMag3 |
[nspid]Source |
WSA NonSurvey |
Default point/extended source K mag (2.0 arcsec aperture diameter) If in doubt use this flux estimator |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kAperMag3 |
[nspid]Source |
WSA NonSurvey |
Default point/extended source K aperture corrected mag (2.0 arcsec aperture diameter) If in doubt use this flux estimator |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kAperMag3Err |
[nspid]Source |
WSA NonSurvey |
Error in extended source K mag (2.0 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
kAperMag3Err |
[nspid]Source |
WSA NonSurvey |
Error in default point/extended source K mag (2.0 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
kAperMag4 |
[nspid]Source |
WSA NonSurvey |
Extended source K mag (2.8 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kAperMag4 |
[nspid]Source |
WSA NonSurvey |
Extended source K aperture corrected mag (2.8 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kAperMag4Err |
[nspid]Source |
WSA NonSurvey |
Error in extended source K mag (2.8 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
kAperMag6 |
[nspid]Source |
WSA NonSurvey |
Extended source K mag (5.7 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kAperMag6 |
[nspid]Source |
WSA NonSurvey |
Extended source K aperture corrected mag (5.7 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kAperMag6Err |
[nspid]Source |
WSA NonSurvey |
Error in extended source K mag (5.7 arcsec aperture diameter) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
kClass |
[nspid]Source |
WSA NonSurvey |
discrete image classification flag in K |
smallint |
2 |
|
-9999 |
CLASS_MISC |
kClassStat |
[nspid]Source |
WSA NonSurvey |
N(0,1) stellarness-of-profile statistic in K |
real |
4 |
|
-0.9999995e9 |
STAT_PROP |
kDeblend |
[nspid]Source |
WSA NonSurvey |
flag indicating parent/child relation in K |
int |
4 |
|
-99999999 |
CODE_MISC |
kEll |
[nspid]Source |
WSA NonSurvey |
1-b/a, where a/b=semi-major/minor axes in K |
real |
4 |
|
-0.9999995e9 |
PHYS_ELLIPTICITY |
keNum |
[nspid]MergeLog |
WSA NonSurvey |
the extension number of this K detector |
tinyint |
1 |
|
|
NUMBER |
kErrBits |
[nspid]Source |
WSA NonSurvey |
processing warning/error bitwise flags in K |
int |
4 |
|
-99999999 |
CODE_MISC |
kEta |
[nspid]Source |
WSA NonSurvey |
Offset of K 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. |
kGausig |
[nspid]Source |
WSA NonSurvey |
RMS of axes of ellipse fit in K |
real |
4 |
pixels |
-0.9999995e9 |
MORPH_PARAM |
kHallMag |
[nspid]Source |
WSA NonSurvey |
Point source K mag |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kHallMag |
[nspid]Source |
WSA NonSurvey |
Total point source K mag |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kHallMagErr |
[nspid]Source |
WSA NonSurvey |
Error in point source K mag |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
kHallMagErr |
[nspid]Source |
WSA NonSurvey |
Error in total point source K mag |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
kMag |
[nspid]CurrentStdStarInfo, [nspid]PreviousStdStarInfo |
WSA NonSurvey |
K band total magnitude of star (from external sources if primary) |
real |
4 |
mag |
|
PHOT_INT-MAG |
kMag |
[nspid]FSstars |
WSA NonSurvey |
K band total magnitude on the MKO(UFTI) system |
real |
4 |
mag |
|
PHOT_INT-MAG |
kMagErr |
[nspid]CurrentStdStarInfo, [nspid]PreviousStdStarInfo |
WSA NonSurvey |
K band magnitude error of star |
real |
4 |
mag |
|
ERROR |
kMagErr |
[nspid]FSstars |
WSA NonSurvey |
K band magnitude error |
real |
4 |
mag |
|
ERROR |
kmfID |
[nspid]MergeLog |
WSA NonSurvey |
the UID of the relevant K multiframe |
bigint |
8 |
|
|
ID_FRAME |
kmh2Ext |
[nspid]Source |
WSA NonSurvey |
Extended source colour K-H2 (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. |
kmh2Ext |
[nspid]Source |
WSA NonSurvey |
Extended source colour K-H2 |
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. |
kmh2ExtErr |
[nspid]Source |
WSA NonSurvey |
Error on extended source colour K-H2 |
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. |
kmh2Pnt |
[nspid]Source |
WSA NonSurvey |
Point source colour K-H2 |
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. |
kmh2Pnt |
[nspid]Source |
WSA NonSurvey |
Point source colour K-H2 (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. |
kmh2Pnt |
[nspid]Source |
WSA NonSurvey |
Point source colour K-H2 (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. |
kmh2PntErr |
[nspid]Source |
WSA NonSurvey |
Error on point source colour K-H2 |
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. |
kObjID |
[nspid]Source |
WSA NonSurvey |
the UID of the K detection |
bigint |
8 |
|
-99999999 |
ID_NUMBER |
kPA |
[nspid]Source |
WSA NonSurvey |
ellipse fit celestial orientation in K |
real |
4 |
Degrees |
-0.9999995e9 |
POS_POS-ANG |
kPetroMag |
[nspid]Source |
WSA NonSurvey |
Extended source K mag (Petrosian) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kPetroMagErr |
[nspid]Source |
WSA NonSurvey |
Error in extended source K mag (Petrosian) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
kppErrBits |
[nspid]Source |
WSA NonSurvey |
additional WFAU post-processing error bits in K |
int |
4 |
|
-99999999 |
CODE_MISC |
kppErrBits |
[nspid]Source |
WSA NonSurvey |
additional WFAU post-processing error bits in K |
int |
4 |
|
0 |
CODE_MISC |
kPsfMag |
[nspid]Source |
WSA NonSurvey |
Point source profile-fitted K mag |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kPsfMagErr |
[nspid]Source |
WSA NonSurvey |
Error in point source profile-fitted K mag |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
kronFlux |
[nspid]Detection |
WSA NonSurvey |
flux within circular aperture to k × r_k ; k = 2 {catalogue TType keyword: Kron_flux} |
real |
4 |
ADU |
|
PHOT_INTENSITY_ADU |
kronFluxErr |
[nspid]Detection |
WSA NonSurvey |
error on Kron flux {catalogue TType keyword: Kron_flux_err} |
real |
4 |
ADU |
|
ERROR |
kronMag |
[nspid]Detection |
WSA NonSurvey |
Calibrated Kron magnitude within circular aperture r_k |
real |
4 |
mag |
|
PHOT_INT-MAG |
kronMagErr |
[nspid]Detection |
WSA NonSurvey |
error on calibrated Kron magnitude |
real |
4 |
mag |
|
ERROR |
kronRad |
[nspid]Detection |
WSA NonSurvey |
r_k as defined in Bertin and Arnouts 1996 A&A Supp 117 393 {catalogue TType keyword: Kron_radius} |
real |
4 |
pixels |
|
EXTENSION_RAD |
kSeqNum |
[nspid]Source |
WSA NonSurvey |
the running number of the K detection |
int |
4 |
|
-99999999 |
ID_NUMBER |
kSerMag2D |
[nspid]Source |
WSA NonSurvey |
Extended source K mag (profile-fitted) |
real |
4 |
mag |
-0.9999995e9 |
PHOT_MAG |
kSerMag2DErr |
[nspid]Source |
WSA NonSurvey |
Error in extended source K mag (profile-fitted) |
real |
4 |
mag |
-0.9999995e9 |
ERROR |
kXi |
[nspid]Source |
WSA NonSurvey |
Offset of K 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. |