SACSTPSCAT ivo://nasa.heasarc/sacstpscat NASA/GSFC HEASARC Dai et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The Swift Active galactic nucleus (AGN) and Cluster Survey (SACS) uses 125 deg<sup>2</sup> of Swift X-Ray Telescope (XRT) serendipitous fields with variable depths surrounding gamma-ray bursts to provide a medium depth (4 x 10<sup>-15</sup> erg cm<sup>-2</sup> s<sup>-1</sup>) and medium area survey filling the gap between deep, narrow Chandra/XMM-Newton surveys and wide, shallow ROSAT surveys. In the reference paper, a catalog of 22,563 point sources and 442 extended sources, and the number counts of the AGN and galaxy cluster populations are presented. SACS provides excellent constraints on the AGN number counts at the bright end with negligible uncertainties due to cosmic variance, and these constraints are consistent with previous measurements. The authors use Wide-field Infrared Survey Explorer (WISE) mid-infrared(MIR) colors to classify the sources. For AGNs, they can roughly separate the point sources into MIR-red and MIR-blue AGNs, finding roughly equal numbers of each type in the soft X-ray band (0.5-2.0 keV), but fewer MIR-blue sources in the hard X-ray band (2-8 keV). The cluster number counts, with 5% uncertainties from cosmic variance, are also consistent with previous surveys but span a much larger continuous flux range. Deep optical or IR followup observations of this cluster sample will significantly increase the number of higher redshift (z > 0.5) X-ray-selected clusters. This HEASARC table contains the list of 22,563 Swift XRT point sources which were detected in the total X-ray band image (0.2-10 keV) using wavdetect with a false positive threshold of 10<sup>-6</sup> (contained in Table 1 of the reference paper). The authors consider these sources to be AGN candidates. This table was created by the HEASARC in June 2015 based on an electronic version of Table 1 of the reference paper, the list of Swift XRT point sources detected in the total X-ray (0.2-10 keV) band, which was obtained from the ApJS web site. This is a service provided by NASA HEASARC . 2015ApJS..218....8D https://heasarc.gsfc.nasa.gov/W3Browse/all/sacstpscat.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=sacstpscat& GET text/xml 180 99999 true 277.497 -86.3166 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=sacstpscat GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_sacstpscat&Action=More+Options&Action=Parameter+Search&ConeAdd=1 SWIFT 0.0166666666666667 X-ray public sacstpscat Swift AGN & Cluster Survey (SACS) Total-Band (0.2-10 keV) Point name Source Identifier meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable ra_error Uncertainty in Right Ascension arcsec stat.error;pos.eq.ra;meta.main double nullable dec_error Uncertainty in Declination arcsec stat.error;pos.eq.dec;meta.main double nullable count_rate The 0.2-10 keV Count Rate ct/s phot.count;em.X-ray double nullable count_rate_error Uncertainty in the 0.2-10 keV Count Rate ct/s stat.error;phot.count;em.X-ray double nullable flux The 0.5-8 keV Flux erg/s/cm^2 phot.flux;em.X-ray double nullable exposure Exposure s time.duration;obs.exposure double nullable w1_mag WISE 3.4-micron Band Magnitude mag phot.mag;em.IR.3-4um double nullable off_set Swift and WISE Positional Offset arcsec pos.angDistance;em.X-ray;em.IR double nullable w3_mag WISE 12-micron Band Magnitude mag phot.mag;em.IR.8-15um double nullable bii Galactic Latitude degree pos.galactic.lat double nullable w2_mag WISE 4.6-micron Band Magnitude mag phot.mag;em.IR.4-8um double nullable lii Galactic Longitude degree pos.galactic.lon double nullable w4_mag WISE 22-micron Band Magnitude mag phot.mag;em.IR.15-30um double nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable