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 Database: 3XMMDR7SLIM
   XMM Third Serendipitous Source Survey Data Release 7 (SLIM)
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Equatorial Ecliptic Galactic
Equinox: 1950 2000

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Definition
 
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 SRCID 
A unique number assigned to a group of catalogue entries which are assumed to be the same source. The process of grouping detections in to unique sources has changed since the 2XMM catalogue series and is described in Section 3.8. The SRCID assignments in 3XMM-DR5 bear no relation to those in 3XMM-DR4 but the nearest unique sources from the 3XMM-DR4 catalogue to the 3XMM-DR5 unique source is provided via the DR4SRCID column.
 IAUNAME 
The IAU name assigned to the unique SRCID (see 3XMM-DR5 UG, Sec. 3.8.1).
 SC_RA 
The mean Right Ascension in degrees (J2000) of all the detections of the source SRCID weighted by the positional errors POSERR.
 SC_DEC 
The mean Declination in degrees (J2000) of all the detections of the source SRCID (see DEC) weighted by the positional errors POSERR.
 SC_POSERR 
The error of the weighted mean position given in SC_RA and SC_DEC in arseconds (see Sec. 3.2.4 at http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb).
 SC_DET_ML 
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_EP_1_FLUX 
The mean band 1 flux (0.2 - 0.5 keV) of all the detections of the source SRCID (EP_1_FLUX) weighted by the errors (EP_1_FLUX_ERR), in erg/cm2/s.
 SC_EP_1_FLUX_ERR 
Error on the weighted mean band 1 flux in SC_EP_1_FLUX (see http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb for details).
 SC_EP_2_FLUX 
The 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_ERR 
Error on the weighted mean band 2 flux in SC_EP_2_FLUX (see http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb for details).
 SC_EP_3_FLUX 
The 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_ERR 
Error on the weighted mean band 3 flux in SC_EP_2_FLUX (see http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb for details).
 SC_EP_4_FLUX 
The 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_ERR 
Error on the weighted mean band 4 flux in SC_EP_2_FLUX (see http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb for details).
 SC_EP_5_FLUX 
The 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_ERR 
Error on the weighted mean band 5 flux in SC_EP_2_FLUX (see http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb for details).
 SC_EP_8_FLUX 
The 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_ERR 
Error on the weighted mean total band flux in SC_EP_8_FLUX (see http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb for details).
 SC_EP_9_FLUX 
The 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_ERR 
Error on the weighted mean band 9 flux in SC_EP_9_FLUX (see http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb for details).
 SC_HR1 
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_ERR 
Error on the weighted mean hardness ratio in SC_HR1 (see http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb for details).
 SC_HR2 
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_ERR 
Error on the weighted mean hardness ratio in SC_HR2 (see http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb for details).
 SC_HR3 
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_ERR 
Error on the weighted mean hardness ratio in SC_HR3 (see http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb for details).
 SC_HR4 
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_ERR 
Error on the weighted mean hardness ratio in SC_HR4 (see http://xmmssc-www.star.le.ac.uk/Catalogue/2XMM/UserGuide_xmmcat.html#CatComb for details).
 SC_EXTENT 
Extent radius of a source detected as extended by the SAS task emldetect (for more details see http://xmmssc.irap.omp.eu/Catalogue/3XMM-DR5/col_srcpar.html)
 SC_EXT_ML 
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_CHI2PROB 
The chi square 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_FVAR 
The fractional excess variance of the unique source. It is the value corresponding to the exposure and instrument that shows the lowest probability of being constant (i.e. it is the PN_FVAR, M1_FVAR or M2_FVAR value corresponding to EP_CHI2PROB, SC_CHI2PROB.
 SC_FVARERR 
The error on the fractional excess variance of the unique source. It is the value corresponds to the exposure and instrument that shows the lowest probability of being constant (i.e. it is the PN_FVARERR, M1_FVARERR or M2_FVARERR value corresponding to EP_CHI2PROB, SC_CHI2PROB.
 SC_VAR_FLAG 
The variability flag for the unique source SRCID is set to VAR_FLAG of the most variable detection of this source.
 SC_SUM_FLAG 
The summary flag for the unique source SRCID is taken to be the worst flag of all detections of this source (SUM_FLAG).
 SC_EP_8_FMIN 
The minimum EPIC band 8 flux (EP_8_FLUX) amongst any of the constituent detections of the unique source.
 SC_EP_8_FMIN_ERR 
The error on the minimum EPIC band 8 flux (EP_8_FLUX_ERR) amongst any of the constituent detections of the unique source.
 SC_EP_8_FMAX 
The maximum EPIC band 8 flux (EP_8_FLUX) amongst any of the constituent detections of the unique source.
 SC_EP_8_FMAX_ERR 
The error on the maximum EPIC band 8 flux (EP_8_FLUX_ERR) amongst any of the constituent detections of the unique source.
 MJD_FIRST 
The MJD start date (MJD_START) of the earliest observation of any constituent detection of the unique source.
 MJD_LAST 
The MJD end date (MJD_STOP) of the last observation of any constituent detection of the unique source.
 N_DETECTIONS 
The number of detections of the unique source SRCID used to derive the combined values.
 CONFUSED 
Normally set False, but set True when a given detection has a probability above zero of being associated with two or more distinct sources. The SRCID is that of the match with the highest probability, but there remains some uncertainty about which source is the correct match for the detection.
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