Unique source parameters (42 columns)

SC_RA (D) [deg]: The mean Right Ascension in degrees (J2000) of all the detections of the source SRCID (see RA) weighted by the positional errors POSERR.
SC_DEC (D) [deg]: The mean Declination in degrees (J2000) of all the detections of the source SRCID (see DEC) weighted by the positional errors POSERR.
SC_POSERR (E) [arcsec]: The radial error on the mean coordinates given in SC_RA and SC_DEC in arseconds. It is the weighted mean of the POSERR values (see 2XMM UG, Sec. 3.2.4 for details).
SC_DET_ML (E): 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 (E) [erg/cm²/s]: The 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_ERR (E) [erg/cm²/s]: Error on the weighted mean band 1 flux in SC_EP_1_FLUX (see 2XMM UG, Sec. 3.2.4 for details).
SC_EP_2_FLUX (E) [erg/cm²/s]: 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 (E) [erg/cm²/s]: Error on the weighted mean band 2 flux in SC_EP_2_FLUX (see 2XMM UG, Sec. 3.2.4 for details).
SC_EP_3_FLUX (E) [erg/cm²/s]: 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 (E) [erg/cm²/s]: Error on the weighted mean band 3 flux in SC_EP_3_FLUX (see 2XMM UG, Sec. 3.2.4 for details).
SC_EP_4_FLUX (E) [erg/cm²/s]: 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 (E) [erg/cm²/s]: Error on the weighted mean band 4 flux in SC_EP_4_FLUX (see 2XMM UG, Sec. 3.2.4 for details).
SC_EP_5_FLUX (E) [erg/cm²/s]: 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 (E) [erg/cm²/s]: Error on the weighted mean band 5 flux in SC_EP_5_FLUX (see 2XMM UG, Sec. 3.2.4 for details).
SC_EP_8_FLUX (E) [erg/cm²/s]: 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 (E) [erg/cm²/s]: Error on the weighted mean total band flux in SC_EP_8_FLUX (see 2XMM UG, Sec. 3.2.4 for details).
SC_EP_9_FLUX (E) [erg/cm²/s]: 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 (E) [erg/cm²/s]: Error on the weighted mean band 9 flux in SC_EP_9_FLUX (see 2XMM UG, Sec. 3.2.4 for details).
SC_HR1 (E): 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 (E): Error on the weighted mean hardness ratio in SC_HR1 (see 2XMM UG, Sec. 3.2.4 for details).
SC_HR2 (E): 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 (E): Error on the weighted mean hardness ratio in SC_HR2 (see 2XMM UG, Sec. 3.2.4 for details).
SC_HR3 (E): 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 (E): Error on the weighted mean hardness ratio in SC_HR3 (see 2XMM UG, Sec. 3.2.4 for details).
SC_HR4 (E): 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 (E): Error on the weighted mean hardness ratio in SC_HR4 (see 2XMM UG, Sec. 3.2.4 for details).
SC_EXTENT (E): The total band extent (arcseconds) of the source SRCID is the weighted average of the EPIC extents of all detections of this source (EP_EXTENT).
SC_EXTENT_ERR (E): The error on the weighted mean total band extent (arcseconds) of the source SRCID (EP_EXTENT_ERR).
SC_EXT_ML (E): The total band detection likelihood of the extended source SRCID is the largest of the extent likelihoods of all detections of this source (EP_EXTENT_ML).
SC_CHI2PROB (E): The χ² probability (based on the null hypothesis) that the time series of the unique source SRCID as detected by any of the observations can be explained by a constant flux, that is, the minimum value of the EPIC probabilities in each detection, EP_CHI2PROB, is given.
SC_FVAR (E): The fractional RMS variability amplitude 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 (E): The error on the fractional RMS variability amplitude 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 (L): The variability flag for the unique source SRCID is set to VAR_FLAG of the most variable detection of this source. Note that where a timeseries is not available or insufficient points are left in the timeseries after applying background flare GTIs, the value is set to NULL or Undefined
SC_SUM_FLAG (J): 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 (E) [erg/cm²/s]: The minimum EPIC band 8 flux (EP_8_FLUX) amongst any of the constituent detections of the unique source.
SC_EP_8_FMIN_ERR (E) [erg/cm²/s]: 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 (E) [erg/cm²/s]: The maximum EPIC band 8 flux (EP_8_FLUX) amongst any of the constituent detections of the unique source.
SC_EP_8_FMAX_ERR (E) [erg/cm²/s]: 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 (D) [d]: The MJD start date (MJD_START) of the earliest observation of any constituent detection of the unique source.
MJD_LAST (D) [d]: The MJD end date (MJD_STOP) of the last observation of any constituent detection of the unique source.
N_DETECTIONS (J): The number of detections of the unique source SRCID used to derive the combined values.
CONFUSED (J): 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.