TABLE  twoxmmi_dr3_v1_0

Contains the parameters provided for each source in the 2XMMi-DR3 catalogue v. 1.0

The XMM-Newton serendipitous source catalogue, as described at
http://xmmssc-www.star.le.ac.uk/Catalogue/xcat_public_2XMMi-DR3.html
is contained in this table. See the above URL for further details.

Required constraints:
  • Primary key is (detid)

NameTypeLengthUnitDescriptionDefault ValueUnified Content Descriptor
DETIDint4 A consecutive number which identifies each entry (detection) in the catalogue.  
SRCIDint4 A unique number assigned to a group of catalogue entries which are assumed to be the same source. To identify members of the same group the distance in arcseconds between each pair of sources was compared on the two-sigma level of both positional errors. A maximum distance of 7" was assumed, which was reduced to 0.9 * DIST_NN (distance to the nearest neighbour) where necessary.  
SRCID_2XMMiint4 The unique source ID of the detection, DETID, in the 2XMMi catalogue. Due to the nature of the matching algorithm, some detections were re-assigned to a different source due to the presence of new detections.  
IAUNAMEvarchar30 The IAU name assigned to the unique SRCID.  
SRC_NUMint4 The (decimal) source number in the individual source list for this observation; in the hexadecimal system it identifies the source-specific product files belonging to this detection.  
OBSIDvarchar10 The XMM-Newton observation identification.  
REVOLUTvarchar4orbitThe XMM-Newton revolution number.  
MJD_STARTfloat8daysModified Julian Date (i.e., JD - 2400000.5) of the start of the observation.  
MJD_STOPfloat8 Modified Julian Date (i.e., JD - 2400000.5) of the end of the observation.  
OBS_CLASSint4 Quality classification of the whole observation based on the area flagged as bad in the manual flagging process as compared to the whole detection area. 0 means nothing has been flagged; 1 indicates that 0% < area < 0.1% of the total detection mask has been flagged; 2 indicates that 0.1% <= area < 1% has been flagged; 3 indicates that 1% <= area < 10% has been flagged; 4 indicates that 10% <= area < 100% has been flagged; and 5 means that the whole field was flagged as bad.  
PN_FILTERvarchar6 PN filter. The options are Thick, Medium, Thin1, Thin2, and Open, depending on the efficiency of the optical blocking.  
M1_FILTERvarchar6 M1 filter. The options are Thick, Medium, Thin1, and Open, depending on the efficiency of the optical blocking.  
M2_FILTERvarchar6 M2 filter. The options are Thick, Medium, Thin1, and Open, depending on the efficiency of the optical blocking.  
PN_SUBMODEvarchar23 PN observing mode. The options are full frame mode with the full FOV exposed (in two sub-modes), and large window mode with only parts of the FOV exposed.  
M1_SUBMODEvarchar16 M1 observing mode. The options are full frame mode with the full FOV exposed, partial window mode with only parts of the central CCD exposed (in different sub-modes), and timing mode where the central CCD was not exposed ('Fast Uncompressed').  
M2_SUBMODEvarchar16 M2 observing mode. The options are full frame mode with the full FOV exposed, partial window mode with only parts of the central CCD exposed (in different sub-modes), and timing mode where the central CCD was not exposed ('Fast Uncompressed').  
RAfloat8degreesCorrected Right Ascension of the detection in degrees (J2000) after statistical correlation of the emldetect coordinates, RA_UNC and DEC_UNC, with the USNO B1.0 optical source catalogue using the SAS task eposcorr. In case where the cross-correlation is determined to be unreliable no correction is applied and this value is therefore the same as RA_UNC.  
DECfloat8degreesCorrected Declination of the detection in degrees (J2000) after statistical correlation of the emldetect coordinates, RA_UNC and DEC_UNC, with the USNO B1.0 optical source catalogue using the SAS task eposcorr. In case where the cross-correlation is determined to be unreliable no correction is applied and this value is therefore the same as DEC_UNC.  
POSERRreal4arcsecTotal position uncertainty in arcseconds calculated by combining the statistical error RADEC_ERR and the systematic error SYSERR as follows: POSERR = SQRT ( RADEC_ERR² + SYSERR² ).  
LIIfloat8degreesGalactic longitude of the detection in degrees corresponding to the (corrected) coordinates RA and DEC.  
BIIfloat8degreesGalactic latitude of the detection in degrees corresponding to the (corrected) coordinates RA and DEC.  
RADEC_ERRreal4arcsecStatistical 1 σ error on the detection position in arcseconds.  
SYSERRreal4arcsecThe systematic 1 σ error on the detection position in arcseconds. It is set to be 0.35 arcsec if the SAS task eposcorr results in a statistically reliable cross-correlation with USNO B1.0 optical catalogue. Otherwise the error is 1.0 arsec.  
RA_UNCfloat8degreesRight Ascension of the source in degrees (J2000) as determined by the SAS task emldetect by fitting a detection simultaneously in all cameras and energy bands.  
DEC_UNCfloat8degreesDeclination of the source in degrees (J2000) as determined by the SAS task emldetect by fitting a detection simultaneously in all cameras and energy bands.  
CXfloat8 unit vector of spherical co-ordinates POS_EQ_X
CYfloat8 unit vector of spherical co-ordinates POS_EQ_Y
CZfloat8 unit vector of spherical co-ordinates POS_EQ_Z
HTMIDbigint8 Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates POS_GENERAL
EP_1_FLUXreal4erg/cm**2/sEP band 1 flux  
EP_1_FLUX_ERR tooltipreal4erg/cm**2/sEP band 1 flux error  
EP_2_FLUXreal4erg/cm**2/sEP band 2 flux  
EP_2_FLUX_ERR tooltipreal4erg/cm**2/sEP band 2 flux error  
EP_3_FLUXreal4erg/cm**2/sEP band 3 flux  
EP_3_FLUX_ERR tooltipreal4erg/cm**2/sEP band 3 flux error  
EP_4_FLUXreal4erg/cm**2/sEP band 4 flux  
EP_4_FLUX_ERR tooltipreal4erg/cm**2/sEP band 4 flux error  
EP_5_FLUXreal4erg/cm**2/sEP band 5 flux  
EP_5_FLUX_ERR tooltipreal4erg/cm**2/sEP band 5 flux error  
EP_8_FLUXreal4erg/cm**2/sEP band 8 flux  
EP_8_FLUX_ERR tooltipreal4erg/cm**2/sEP band 8 flux error  
EP_9_FLUXreal4erg/cm**2/sEP band 9 flux  
EP_9_FLUX_ERR tooltipreal4erg/cm**2/sEP band 9 flux error  
PN_1_FLUXreal4erg/cm**2/sPN band 1 flux  
PN_1_FLUX_ERRreal4erg/cm**2/sPN band 1 flux error  
PN_2_FLUXreal4erg/cm**2/sPN band 2 flux  
PN_2_FLUX_ERRreal4erg/cm**2/sPN band 2 flux error  
PN_3_FLUXreal4erg/cm**2/sPN band 3 flux  
PN_3_FLUX_ERRreal4erg/cm**2/sPN band 3 flux error  
PN_4_FLUXreal4erg/cm**2/sPN band 4 flux  
PN_4_FLUX_ERRreal4erg/cm**2/sPN band 4 flux error  
PN_5_FLUXreal4erg/cm**2/sPN band 5 flux  
PN_5_FLUX_ERRreal4erg/cm**2/sPN band 5 flux error  
PN_8_FLUXreal4erg/cm**2/sPN band 8 flux  
PN_8_FLUX_ERRreal4erg/cm**2/sPN band 8 flux error  
PN_9_FLUXreal4erg/cm**2/sPN band 9 flux  
PN_9_FLUX_ERRreal4erg/cm**2/sPN band 9 flux error  
M1_1_FLUXreal4erg/cm**2/sM1 band 1 flux  
M1_1_FLUX_ERRreal4erg/cm**2/sM1 band 1 flux error  
M1_2_FLUXreal4erg/cm**2/sM1 band 2 flux  
M1_2_FLUX_ERRreal4erg/cm**2/sM1 band 2 flux error  
M1_3_FLUXreal4erg/cm**2/sM1 band 3 flux  
M1_3_FLUX_ERRreal4erg/cm**2/sM1 band 3 flux error  
M1_4_FLUXreal4erg/cm**2/sM1 band 4 flux  
M1_4_FLUX_ERRreal4erg/cm**2/sM1 band 4 flux error  
M1_5_FLUXreal4erg/cm**2/sM1 band 5 flux  
M1_5_FLUX_ERRreal4erg/cm**2/sM1 band 5 flux error  
M1_8_FLUXreal4erg/cm**2/sM1 band 8 flux  
M1_8_FLUX_ERRreal4erg/cm**2/sM1 band 8 flux error  
M1_9_FLUXreal4erg/cm**2/sM1 band 9 flux  
M1_9_FLUX_ERRreal4erg/cm**2/sM1 band 9 flux error  
M2_1_FLUXreal4erg/cm**2/sM2 band 1 flux  
M2_1_FLUX_ERRreal4erg/cm**2/sM2 band 1 flux error  
M2_2_FLUXreal4erg/cm**2/sM2 band 2 flux  
M2_2_FLUX_ERRreal4erg/cm**2/sM2 band 2 flux error  
M2_3_FLUXreal4erg/cm**2/sM2 band 3 flux  
M2_3_FLUX_ERRreal4erg/cm**2/sM2 band 3 flux error  
M2_4_FLUXreal4erg/cm**2/sM2 band 4 flux  
M2_4_FLUX_ERRreal4erg/cm**2/sM2 band 4 flux error  
M2_5_FLUXreal4erg/cm**2/sM2 band 5 flux  
M2_5_FLUX_ERRreal4erg/cm**2/sM2 band 5 flux error  
M2_8_FLUXreal4erg/cm**2/sM2 band 8 flux  
M2_8_FLUX_ERRreal4erg/cm**2/sM2 band 8 flux error  
M2_9_FLUXreal4erg/cm**2/sM2 band 9 flux  
M2_9_FLUX_ERRreal4erg/cm**2/sM2 band 9 flux error  
EP_8_RATEreal4counts/sEP band 8 Count rates  
EP_8_RATE_ERRreal4counts/sEP band 8 Count rates error  
EP_9_RATEreal4counts/sEP band 9 Count rates  
EP_9_RATE_ERRreal4counts/sEP band 9 Count rates error  
PN_1_RATEreal4counts/sPN band 1 Count rates  
PN_1_RATE_ERRreal4counts/sPN band 1 Count rates error  
PN_2_RATEreal4counts/sPN band 2 Count rates  
PN_2_RATE_ERRreal4counts/sPN band 2 Count rates error  
PN_3_RATEreal4counts/sPN band 3 Count rates  
PN_3_RATE_ERRreal4counts/sPN band 3 Count rates error  
PN_4_RATEreal4counts/sPN band 4 Count rates  
PN_4_RATE_ERRreal4counts/sPN band 4 Count rates error  
PN_5_RATEreal4counts/sPN band 5 Count rates  
PN_5_RATE_ERRreal4counts/sPN band 5 Count rates error  
PN_8_RATEreal4counts/sPN band 8 Count rates  
PN_8_RATE_ERRreal4counts/sPN band 8 Count rates error  
PN_9_RATEreal4counts/sPN band 9 Count rates  
PN_9_RATE_ERRreal4counts/sPN band 9 Count rates error  
M1_1_RATEreal4counts/sM1 band 1 Count rates  
M1_1_RATE_ERRreal4counts/sM1 band 1 Count rates error  
M1_2_RATEreal4counts/sM1 band 2 Count rates  
M1_2_RATE_ERRreal4counts/sM1 band 2 Count rates error  
M1_3_RATEreal4counts/sM1 band 3 Count rates  
M1_3_RATE_ERRreal4counts/sM1 band 3 Count rates error  
M1_4_RATEreal4counts/sM1 band 4 Count rates  
M1_4_RATE_ERRreal4counts/sM1 band 4 Count rates error  
M1_5_RATEreal4counts/sM1 band 5 Count rates  
M1_5_RATE_ERRreal4counts/sM1 band 5 Count rates error  
M1_8_RATEreal4counts/sM1 band 8 Count rates  
M1_8_RATE_ERRreal4counts/sM1 band 8 Count rates error  
M1_9_RATEreal4counts/sM1 band 9 Count rates  
M1_9_RATE_ERRreal4counts/sM1 band 9 Count rates error  
M2_1_RATEreal4counts/sM2 band 1 Count rates  
M2_1_RATE_ERRreal4counts/sM2 band 1 Count rates error  
M2_2_RATEreal4counts/sM2 band 2 Count rates  
M2_2_RATE_ERRreal4counts/sM2 band 2 Count rates error  
M2_3_RATEreal4counts/sM2 band 3 Count rates  
M2_3_RATE_ERRreal4counts/sM2 band 3 Count rates error  
M2_4_RATEreal4counts/sM2 band 4 Count rates  
M2_4_RATE_ERRreal4counts/sM2 band 4 Count rates error  
M2_5_RATEreal4counts/sM2 band 5 Count rates  
M2_5_RATE_ERRreal4counts/sM2 band 5 Count rates error  
M2_8_RATEreal4counts/sM2 band 8 Count rates  
M2_8_RATE_ERRreal4counts/sM2 band 8 Count rates error  
M2_9_RATEreal4counts/sM2 band 9 Count rates  
M2_9_RATE_ERRreal4counts/sM2 band 9 Count rates error  
EP_8_CTSreal4countsCombined band source counts  
EP_8_CTS_ERRreal4countsCombined band source counts 1 σ error  
PN_8_CTSreal4countsCombined band source counts  
PN_8_CTS_ERRreal4countsCombined band source counts 1 σ error  
M1_8_CTSreal4countsCombined band source counts  
M1_8_CTS_ERRreal4countsCombined band source counts 1 σ error  
M2_8_CTSreal4countsCombined band source counts  
M2_8_CTS_ERRreal4countsCombined band source counts 1 σ error  
EP_8_DET_MLreal4 EP band 8 Maximum likelihood  
EP_9_DET_MLreal4 EP band 9 Maximum likelihood  
PN_1_DET_MLreal4 PN band 1 Maximum likelihood  
PN_2_DET_MLreal4 PN band 2 Maximum likelihood  
PN_3_DET_MLreal4 PN band 3 Maximum likelihood  
PN_4_DET_MLreal4 PN band 4 Maximum likelihood  
PN_5_DET_MLreal4 PN band 5 Maximum likelihood  
PN_8_DET_MLreal4 PN band 8 Maximum likelihood  
PN_9_DET_MLreal4 PN band 9 Maximum likelihood  
M1_1_DET_MLreal4 M1 band 1 Maximum likelihood  
M1_2_DET_MLreal4 M1 band 2 Maximum likelihood  
M1_3_DET_MLreal4 M1 band 3 Maximum likelihood  
M1_4_DET_MLreal4 M1 band 4 Maximum likelihood  
M1_5_DET_MLreal4 M1 band 5 Maximum likelihood  
M1_8_DET_MLreal4 M1 band 8 Maximum likelihood  
M1_9_DET_MLreal4 M1 band 9 Maximum likelihood  
M2_1_DET_MLreal4 M2 band 1 Maximum likelihood  
M2_2_DET_MLreal4 M2 band 2 Maximum likelihood  
M2_3_DET_MLreal4 M2 band 3 Maximum likelihood  
M2_4_DET_MLreal4 M2 band 4 Maximum likelihood  
M2_5_DET_MLreal4 M2 band 5 Maximum likelihood  
M2_8_DET_MLreal4 M2 band 8 Maximum likelihood  
M2_9_DET_MLreal4 M2 band 9 Maximum likelihood  
EP_EXTENTreal4arcsecThe Extent radius of a source detected as extended.  
EP_EXTENT_ERRreal4arcsecThe Extent error of a source detected as extended.  
EP_EXTENT_MLreal4 The extent likelihood is the likelihood of the detection being extended as given by P = - ln (EXTENT_ML) , where P is the probability the extent occurring by chance.  
EP_HR1 tooltipreal4 The EP hardness ratio between the bands 1 & 2  
EP_HR1_ERRreal4 The 1 σ error of the EP hardness ratio between the bands 1 & 2  
EP_HR2 tooltipreal4 The EP hardness ratio between the bands 2 & 3  
EP_HR2_ERRreal4 The 1 σ error of the EP hardness ratio between the bands 2 & 3  
EP_HR3 tooltipreal4 The EP hardness ratio between the bands 3 & 4  
EP_HR3_ERRreal4 The 1 σ error of the EP hardness ratio between the bands 3 & 4  
EP_HR4 tooltipreal4 The EP hardness ratio between the bands 4 & 5  
EP_HR4_ERRreal4 The 1 σ error of the EP hardness ratio between the bands 4 & 5  
PN_HR1 tooltipreal4 The PN hardness ratio between the bands 1 & 2  
PN_HR1_ERRreal4 The 1 σ error of the PN hardness ratio between the bands 1 & 2  
PN_HR2 tooltipreal4 The PN hardness ratio between the bands 2 & 3  
PN_HR2_ERRreal4 The 1 σ error of the PN hardness ratio between the bands 2 & 3  
PN_HR3 tooltipreal4 The PN hardness ratio between the bands 3 & 4  
PN_HR3_ERRreal4 The 1 σ error of the PN hardness ratio between the bands 3 & 4  
PN_HR4 tooltipreal4 The PN hardness ratio between the bands 4 & 5  
PN_HR4_ERRreal4 The 1 σ error of the PN hardness ratio between the bands 4 & 5  
M1_HR1 tooltipreal4 The M1 hardness ratio between the bands 1 & 2  
M1_HR1_ERRreal4 The 1 σ error of the M1 hardness ratio between the bands 1 & 2  
M1_HR2 tooltipreal4 The M1 hardness ratio between the bands 2 & 3  
M1_HR2_ERRreal4 The 1 σ error of the M1 hardness ratio between the bands 2 & 3  
M1_HR3 tooltipreal4 The M1 hardness ratio between the bands 3 & 4  
M1_HR3_ERRreal4 The 1 σ error of the M1 hardness ratio between the bands 3 & 4  
M1_HR4 tooltipreal4 The M1 hardness ratio between the bands 4 & 5  
M1_HR4_ERRreal4 The 1 σ error of the M1 hardness ratio between the bands 4 & 5  
M2_HR1 tooltipreal4 The M2 hardness ratio between the bands 1 & 2  
M2_HR1_ERRreal4 The 1 σ error of the M2 hardness ratio between the bands 1 & 2  
M2_HR2 tooltipreal4 The M2 hardness ratio between the bands 2 & 3  
M2_HR2_ERRreal4 The 1 σ error of the M2 hardness ratio between the bands 2 & 3  
M2_HR3 tooltipreal4 The M2 hardness ratio between the bands 3 & 4  
M2_HR3_ERRreal4 The 1 σ error of the M2 hardness ratio between the bands 3 & 4  
M2_HR4 tooltipreal4 The M2 hardness ratio between the bands 4 & 5  
M2_HR4_ERRreal4 The 1 σ error of the M2 hardness ratio between the bands 4 & 5  
PN_1_EXP tooltipreal4sThe PN band 1 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
PN_2_EXP tooltipreal4sThe PN band 2 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
PN_3_EXP tooltipreal4sThe PN band 3 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
PN_4_EXP tooltipreal4sThe PN band 4 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
PN_5_EXP tooltipreal4sThe PN band 5 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
M1_1_EXP tooltipreal4sThe M1 band 1 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
M1_2_EXP tooltipreal4sThe M1 band 1 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
M1_3_EXP tooltipreal4sThe M1 band 2 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
M1_4_EXP tooltipreal4sThe M1 band 3 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
M1_5_EXP tooltipreal4sThe M1 band 4 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
M2_1_EXP tooltipreal4sThe M2 band 5 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
M2_2_EXP tooltipreal4sThe M2 band 2 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
M2_3_EXP tooltipreal4sThe M2 band 3 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
M2_4_EXP tooltipreal4sThe M2 band 4 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
M2_5_EXP tooltipreal4sThe M2 band 5 exposure map, combining the mirror vignetting, detector efficiency, bad pixels and CCD gaps.  
PN_1_BG tooltipreal4counts/pixelThe PN band 1 background map.  
PN_2_BG tooltipreal4counts/pixelThe PN band 2 background map.  
PN_3_BG tooltipreal4counts/pixelThe PN band 3 background map.  
PN_4_BG tooltipreal4counts/pixelThe PN band 4 background map.  
PN_5_BG tooltipreal4counts/pixelThe PN band 5 background map.  
M1_1_BG tooltipreal4counts/pixelThe M1 band 1 background map.  
M1_2_BG tooltipreal4counts/pixelThe M1 band 2 background map.  
M1_3_BG tooltipreal4counts/pixelThe M1 band 3 background map.  
M1_4_BG tooltipreal4counts/pixelThe M1 band 4 background map.  
M1_5_BG tooltipreal4counts/pixelThe M1 band 5 background map.  
M2_1_BG tooltipreal4counts/pixelThe M2 band 1 background map.  
M2_2_BG tooltipreal4counts/pixelThe M2 band 2 background map.  
M2_3_BG tooltipreal4counts/pixelThe M2 band 3 background map.  
M2_4_BG tooltipreal4counts/pixelThe M2 band 4 background map.  
M2_5_BG tooltipreal4counts/pixelThe M2 band 5 background map.  
PN_1_VIGreal4 The PN band 1 vignetting value.  
PN_2_VIGreal4 The PN band 2 vignetting value.  
PN_3_VIGreal4 The PN band 3 vignetting value.  
PN_4_VIGreal4 The PN band 4 vignetting value.  
PN_5_VIGreal4 The PN band 5 vignetting value.  
M1_1_VIGreal4 The M1 band 1 vignetting value.  
M1_2_VIGreal4 The M1 band 2 vignetting value.  
M1_3_VIGreal4 The M1 band 3 vignetting value.  
M1_4_VIGreal4 The M1 band 4 vignetting value.  
M1_5_VIGreal4 The M1 band 5 vignetting value.  
M2_1_VIGreal4 The M2 band 1 vignetting value.  
M2_2_VIGreal4 The M2 band 2 vignetting value.  
M2_3_VIGreal4 The M2 band 3 vignetting value.  
M2_4_VIGreal4 The M2 band 4 vignetting value.  
M2_5_VIGreal4 The M2 band 5 vignetting value.  
EP_ONTIME tooltipreal4sThe EP ontime value (the total good exposure time (after GTI filtering) of the CCD where the detection is positioned).  
PN_ONTIME tooltipreal4sThe PN ontime value (the total good exposure time (after GTI filtering) of the CCD where the detection is positioned).  
M1_ONTIME tooltipreal4sThe M1 ontime value (the total good exposure time (after GTI filtering) of the CCD where the detection is positioned).  
M2_ONTIME tooltipreal4sThe M2 ontime value (the total good exposure time (after GTI filtering) of the CCD where the detection is positioned).  
EP_OFFAX tooltipreal4arcminThe EP offaxis angle (the distance between the detection position and the onaxis position on the respective detector).  
PN_OFFAX tooltipreal4arcminThe PN offaxis angle (the distance between the detection position and the onaxis position on the respective detector).  
M1_OFFAX tooltipreal4arcminThe M1 offaxis angle (the distance between the detection position and the onaxis position on the respective detector).  
M2_OFFAX tooltipreal4arcminThe M2 offaxis angle, (the distance between the detection position and the onaxis position on the respective detector).  
PN_MASKFRAC tooltipreal4 The PSF weighted mean of the detector coverage of a detection as derived from the detection mask.  
M1_MASKFRAC tooltipreal4 The PSF weighted mean of the detector coverage of a detection as derived from the detection mask.  
M2_MASKFRAC tooltipreal4 The PSF weighted mean of the detector coverage of a detection as derived from the detection mask.  
EP_DIST_NN tooltipreal4arcsecThe distance to the nearest neighbouring detection.  
SUM_FLAGint4 The summary flag of the source is derived from EP_FLAG. It is 0 if none of the nine flags was set; it is set to 1 if at least one of the warning flags (flag 1, 2, 3, 9) was set but no possible-spurious-detection flag (flag 7, 8); it is set to 2 if at least one of the possible-spurious-detection flags (flag 7, 8) was set but not the manual flag (flag 11); it is set to 3 if the manual flag (flag 11) was set but no possible-spurious-detection flags (flag 7, 8); it is set to 4 if the manual flag (flag 11) as well as one of the possible-spurious-detection flags (flag 7, 8) is set. The meaning is thus: 0 = good, 1 = source parameters may be affected, 2 = possibly spurious, 3 = located in a area where spurious detection may occur, 4 = located in a area where spurious detection may occur and possibly spurious. .  
EP_FLAGvarchar12 EPIC flag string made of the flags 1 - 12 (counted from left to right), where flag 10 is not used: it combines the PN, M1, and M2 flags, that is, a flag is set in EP_FLAG if at least one of the camera-dependent flags is set.  
PN_FLAG tooltipvarchar12 PN flag string made of the flags 1 - 12 (counted from left to right) for the PN source detection.  
M1_FLAG tooltipvarchar12 M1 flag string made of the flags 1 - 12 (counted from left to right) for the PN source detection.  
M2_FLAG tooltipvarchar12 PN flag string made of the flags 1 - 12 (counted from left to right) for the M2 source detection.  
TSERIESvarchar5 The flag is set to True if this source has a time series made in at least one exposure.  
SPECTRAvarchar5 The flag is set to True if this source has a spectrum made in at least one exposure.  
EP_CHI2PROBreal4 The Chi² probability (based on the null hypothesis) that the source as detected by any of the cameras, is constant. The minimum value of the available camera probabilities (PN_CHI2PROB, M1_CHI2PROB, M2_CHI2PROB) is given.  
PN_CHI2PROB tooltipreal4 The Chi² probability (based on the null hypothesis) that the source as detected by the PN camera is constant.  
M1_CHI2PROB tooltipreal4 The Chi² probability (based on the null hypothesis) that the source as detected by the M1 camera is constant.  
M2_CHI2PROB tooltipreal4 The Chi² probability (based on the null hypothesis) that the source as detected by the M2 camera is constant.  
VAR_FLAGvarchar5 The flag is set to True if this source was detected as variable (Chi² probability < 1E-5, see PN_CHI2PROB, M1_CHI2PROB, M2_CHI2PROB) in at least one exposure.  
VAR_EXP_IDvarchar4 If the source is detected as variable (that is, if VAR_FLAG is set to True), the exposure ID ('S' or 'U' followed by a three-digit number) of the exposure with the smallest Chi² probability is given here.  
VAR_INST_IDvarchar2 If the source is detected as variable (that is, if VAR_FLAG is set to True), the instrument ID (PN, M1, M2) of the exposure given in VAR_EXP_ID is listed here.  
SC_RAfloat8degreesThe mean Right Ascension in degrees (J2000) of all the detections of the source SRCID (see RA) weighted by the positional errors POSERR.  
SC_DECfloat8degreesThe mean Declination in degrees (J2000) of all the detections of the source SRCID (see DEC) weighted by the positional errors POSERR.  
SC_POSERRreal4arcsecThe error of the weighted mean position given in SC_RA and SC_DEC in arcseconds.  
SC_EP_1_FLUXreal4erg/cm**2/sThe mean band 1 flux (0.2 - 0.5 keV) of all the detections of the source SRCID (see EP_1_FLUX) weighted by the errors (EP_1_FLUX_ERR), in erg/cm2/s.  
SC_EP_1_FLUX_ERRreal4erg/cm**2/sError on the weighted mean band 1 flux in SC_EP_1_FLUX.  
SC_EP_2_FLUXreal4erg/cm**2/sThe mean band 2 flux (0.5 - 1.0 keV) of all the detections of the source SRCID (see EP_2_FLUX) weighted by the errors (EP_2_FLUX_ERR), in erg/cm2/s.  
SC_EP_2_FLUX_ERRreal4erg/cm**2/sError on the weighted mean band 2 flux in SC_EP_2_FLUX.  
SC_EP_3_FLUXreal4erg/cm**2/sThe mean band 3 flux (1.0 - 2.0 keV) of all the detections of the source SRCID (see EP_3_FLUX) weighted by the errors (EP_3_FLUX_ERR), in erg/cm2/s.  
SC_EP_3_FLUX_ERRreal4erg/cm**2/sError on the weighted mean band 3 flux in SC_EP_3_FLUX.  
SC_EP_4_FLUXreal4erg/cm**2/sThe mean band 4 flux (2.0 - 4.5 keV) of all the detections of the source SRCID (see EP_4_FLUX) weighted by the errors (EP_4_FLUX_ERR), in erg/cm2/s.  
SC_EP_4_FLUX_ERRreal4erg/cm**2/sError on the weighted mean band 4 flux in SC_EP_4_FLUX.  
SC_EP_5_FLUXreal4erg/cm**2/sThe mean band 5 flux (4.5 - 12 keV) of all the detections of the source SRCID (see EP_5_FLUX) weighted by the errors (EP_5_FLUX_ERR), in erg/cm2/s.  
SC_EP_5_FLUX_ERRreal4erg/cm**2/sError on the weighted mean band 5 flux in SC_EP_5_FLUX.  
SC_EP_8_FLUXreal4erg/cm**2/sThe mean total band flux (0.2 - 12 keV) of all the detections of the source SRCID (see EP_8_FLUX) weighted by the errors (EP_8_FLUX_ERR), in erg/cm2/s.  
SC_EP_8_FLUX_ERRreal4erg/cm**2/sError on the weighted mean total band flux in SC_EP_8_FLUX.  
SC_EP_9_FLUXreal4erg/cm**2/sThe mean band 9 flux (0.5 - 4.5 keV) of all the detections of the source SRCID (see EP_9_FLUX) weighted by the errors (EP_9_FLUX_ERR), in erg/cm2/s.  
SC_EP_9_FLUX_ERRreal4erg/cm**2/sError on the weighted mean band 9 flux in SC_EP_9_FLUX.  
SC_HR1real4 The mean hardness ratio of the bands 1 and 2 of all the detections of the source SRCID (EP_HR1) weighted by the errors(EP_HR1_ERR).  
SC_HR1_ERRreal4 Error on the weighted mean hardness ratio in SC_HR1.  
SC_HR2real4 The mean hardness ratio of the bands 2 and 3 of all the detections of the source SRCID (EP_HR2) weighted by the errors(EP_HR2_ERR).  
SC_HR2_ERRreal4 Error on the weighted mean hardness ratio in SC_HR2.  
SC_HR3real4 The mean hardness ratio of the bands 3 and 4 of all the detections of the source SRCID (EP_HR3) weighted by the errors(EP_HR3_ERR).  
SC_HR3_ERRreal4 Error on the weighted mean hardness ratio in SC_HR3.  
SC_HR4real4 The mean hardness ratio of the bands 4 and 5 of all the detections of the source SRCID (EP_HR4) weighted by the errors(EP_HR4_ERR).  
SC_HR4_ERRreal4 Error on the weighted mean hardness ratio in SC_HR4.  
SC_DET_MLreal4 The total band detection likelihood of the source SRCID is the maximum of the likelihoods of all detections of this source (EP_8_DET_ML).  
SC_EXTENTreal4arcsecThe total band extent of the source SRCID is the weighted average of the EPIC extents of all detections of this source (EP_EXTENT).  
SC_EXT_MLreal4 The total band detection likelihood of the extended source SRCID is the average of the extent likelihoods of all detections of this source (EP_EXTENT_ML).  
SC_CHI2PROBreal4 The Chi² probability (based on the null hypothesis) that the unique source SRCID as detected by any of the observations is constant, that is, the minimum value of the EPIC probabilities in each detection, EP_CHI2PROB, is given.  
SC_VAR_FLAGvarchar5 The variability flag for the unique source SRCID is set to VAR_FLAG of the most variable detection of this source.  
SC_SUM_FLAGint4 The summary flag for the unique source SRCID is taken to be the worst flag of all detections of this source (SUM_FLAG).  
N_DETECTIONSint4 The number of detections of the unique source SRCID used to derive the averaged values.  
SC_DR_FIRSTint4 This flag indicates in which catalogue in the 2XMM catalogue series (starting from 2XMM) this unique source first appeared. The flag is DR1 for 2XMM, DR2 for 2XMMi and DR3 for the present 2XMMi-DR3 catalogue.  
SC_DR_LASTint4 This flag indicates in which catalogue in the 2XMM catalogue series (starting from 2XMM) the parameters of this unique source were last updated (e.g. due to the inclusion of one or more new detections which can add to, or even split, the source). The flag is DR1 for 2XMM, DR2 for 2XMMi and DR3 for the present 2XMMi-DR3 catalogue.  
CONFUSEDvarchar5 This flag (True/False) signifies that the 3-sigma error circle of a detection within this unique source overlaps the 3-sigma error circle of a nearby unique source. As such, it is an indicator of possible confusion (uncertainty) about the assignment of detections between sources.  
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