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VizieR

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J/ApJS/224/40/counts Catalog of Chandra ACIS point like sources (Wang+, 2016)
Detected X-ray point sources in the Chandra ACIS survey and counts in different bands (tables 3 and 4) (766496 rows)
  recno=618352
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ColumnValue  Explain   (UCD)
_RAJ200017 20 52.7400 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000-35 43 17.832 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195017 17 31.7081 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950-35 40 20.350 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon351.4666356 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat+00.6823811 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
618352recno 618352  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

Group 516   [1/4953] Group Number (meta.id)
CXOGSGJ172052.7-354317  Source name (JHHMMSS.s+DDMMSS) (linked to average properties for this source (table 5)) (meta.id;meta.main)
Det2574.i3.46  Source name in individual observations (Note G1)   (meta.id;obs)
Split    Split fraction (Note G2)   (stat.fit.param)
Exp 39648.3 s [58/192363] Source exposure time after deadtime correction (time.duration;obs.exposure)
MJD52517.534 d Modified Julian Date for the beginning point of the observation (time.epoch)
Dedge 16 pix Distance from the source center to the nearest chip edge. (pos.angDistance)
OAA 246 arcsec Off-axis angle, arcseconds (instr.offset)
VigF 0.971   [0.001/1.3] Vignetting factor (Note 3)   (stat.fit.omc)
e_RAJ2000 0.19 arcsec [0/87] Statistical positional error, Right Ascension (stat.error;pos.eq.ra)
e_DEJ2000 0.25 arcsec [0/3] Statistical positional error, Declination (stat.error;pos.eq.dec)
PosErr 1.28 arcsec [1/36] Source positional uncertainties (Note 4)   (pos)
sig 5.1   [-354/1997] Detection significance (Note 5)   (stat.likelihood;obs)
Cts 13.2 ct [0.1/136000] Background-subtracted photon counts (Note 6)   (phot.count;em.X-ray)
e_Cts 3.9 ct [1/3306] Uncertainty in Cts (stat.error)
bkgd 0.8 ct Background counts within the source region (instr.background;obs.field)
CMS 0.57   [-742/241] X-ray color CMS=(M-S)/(H+M+S) (Note 7)   (phot.count;arith.ratio)
e_CMS 0.33   [0/1] Uncertainty in CMS (stat.error)
CHM -0.11   [-7911/269] X-ray color CHM=(H-M)/(H+M+S) (Note 7)   (phot.count;arith.ratio)
e_CHM 0.55   [0/1] Uncertainty in CHM (stat.error)
FX 1.31e-14  Source flux (Note 8)   (phot.flux;em.X-ray)
PK-S 0.041  K-S probability that a source is constant during an observation (stat.fit.goodness;src.var)
SQHhard  Phase classification for the source (Note 9)   (src.class)
sig/PFFT   Period significance and the most possible period (in second) from FFT algorithm (stat.fit.goodness)
Nae    [2/13] Number of possible afterglow events for sources with total events less than 100 (meta.number)
RAJ2000260.21975 deg (i) Right Ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
DEJ2000-35.72162 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
Ct(0.1-1.1) 0.74 ct Source net counts, 0.1-1.1 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.1-1.1) 2.33 ct Uncertainty in Ct(0.1-1.1) (Note 3)   (stat.error)
Ct(0.3-1.1) 0.74 ct Source net counts, 0.3-1.1 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.3-1.1) 2.33 ct Uncertainty in Ct(0.3-1.1) (Note 3)   (stat.error)
Ct(0.3-1) -0.17 ct Source net counts, 0.3-1 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.3-1) 1.87 ct Uncertainty in Ct(0.3-1) (Note 3)   (stat.error)
Ct(0.1-0.5) -0.09 ct Source net counts, 0.1-0.5keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.1-0.5) 1.87 ct Uncertainty in Ct(0.1-0.5) (Note 3)   (stat.error)
Ct(0.3-0.5) -0.09 ct [-265/11865] Source net counts, 0.3-0.5keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.3-0.5) 1.87 ct [1/113] Uncertainty in Ct(0.3-0.5) (Note 3)   (stat.error)
Ct(0.1-0.8) -0.17 ct Source net counts, 0.1-0.8 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.1-0.8) 1.87 ct Uncertainty in Ct(0.1-0.8) (Note 3)   (stat.error)
Ct(0.3-0.8) -0.17 ct Source net counts, 0.3-0.8 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.3-0.8) 1.87 ct Uncertainty in Ct(0.3-0.8) (Note 3)   (stat.error)
Ct(1-2) 7.83 ct Source net counts, 1-2 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(1-2) 3.96 ct Uncertainty in Ct(1-2) (Note 3)   (stat.error)
Ct(1.1-2) 6.91 ct Source net counts, 1.1-2 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(1.1-2) 3.79 ct Uncertainty in Ct(1.1-2) (Note 3)   (stat.error)
Ct(0.5-2.4) 9.66 ct Source net counts, 0.5-2.4 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.5-2.4) 4.28 ct Uncertainty in Ct(0.5-2.4) (Note 3)   (stat.error)
Ct(0.5-2) 7.74 ct Source net counts, 0.5-2 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.5-2) 3.96 ct Uncertainty in Ct(0.5-2) (Note 3)   (stat.error)
Ct(0.8-2) 7.83 ct Source net counts, 0.8-2 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.8-2) 3.96 ct Uncertainty in Ct(0.8-2) (Note 3)   (stat.error)
Ct(2-8) 6.31 ct Source net counts, 2-8 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(2-8) 3.79 ct Uncertainty in Ct(2-8) (Note 3)   (stat.error)
Ct(0.1-8) 13.97 ct Source net counts, 0.1-8 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.1-8) 4.98 ct Uncertainty in Ct(0.1-8) (Note 3)   (stat.error)
Ct(0.3-8) 13.97 ct Source net counts, 0.3-8 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.3-8) 4.98 ct Uncertainty in Ct(0.3-8) (Note 3)   (stat.error)
  
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