CRATES ivo://nasa.heasarc/crates NASA/GSFC HEASARC Healey et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The authors have assembled an 8.4 GHz survey of bright, flat-spectrum (alpha > -0.5) radio sources with nearly uniform extragalactic (|b| > 10 degrees) coverage for sources brighter than a 4.8 GHz flux density S_4.8GHz = 65 mJy. The catalog is assembled from existing observations (especially the Cosmic Lens All-Sky Survey, CLASS, and the Wright et al. PMN-CA survey), augmented by reprocessing of archival VLA and ATCA data and by new observations to fill in coverage gaps. The authors refer to this program as CRATES, the Combined Radio All-Sky Targeted Eight-GHz Survey. The resulting catalog provides precise positions, subarcsecond structures, and spectral indices for some 11,000 sources. The authors describe the morphology and spectral index distribution of the sample and comment on the survey's power to select several classes of interesting sources, especially high-energy blazars. Comparison of CRATES with other high-frequency surveys also provides unique opportunities for identification of high-power radio sources. This table contains 14467 entries, where each entry corresponds to an 8.4-GHz counterpart source (or absence thereof) to one of 11,131 4.8-GHz sources. The number of entries exceeds the number of 4.8-GHz sources because there are many cases in which there are multiple (from 2 - 20) 8.4-GHz counterparts to a single 4.8-GHz source. There are also 762 entries in which no 8.4-GHz counterpart was detected (morph_type = 'N'). This table was created by the HEASARC in August 2007 based on the electronic version of Table 5 obtained from the electronic ApJ web site. This is a service provided by NASA HEASARC . 2007ApJS..171...61H https://heasarc.gsfc.nasa.gov/W3Browse/all/crates.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=crates& GET text/xml 180 99999 true 140.21466667 -87.36513889 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=crates GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_crates&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0833333333333333 Radio public crates CRATES Flat-Spectrum Radio Source Catalog name Source Designation Using Coordinates of the 4.8-GHz Detection 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 flux_3p6_cm The 8.4 GHz Flux Density (mJy) mJy phot.flux.density;em.radio.6-12GHz double nullable spectral_index_2 Spectral Index between Low Frequency and 8.4 GHz spect.index;em.radio double nullable morph_type Flag Indicates Morphology Class src.morph.type char nullable lii Galactic Longitude degree pos.galactic.lon double nullable dec_j2000_low_freq NVSS or SUMSS Declination (J2000) pos.eq.dec char nullable flux_low_freq The Low Frequency Flux Density (mJy) mJy phot.flux.density;em.radio.750-1500MHz double nullable spectral_index_1 Spectral Index between Low Frequency and 4.8 GHz spect.index;em.radio double nullable ra_j2000_low_freq NVSS or SUMSS Right Ascension (J2000) pos.eq.ra char nullable flux_6_cm The 4.8 GHz Flux Density (mJy) mJy phot.flux.density;em.radio.3-6GHz int nullable bii Galactic Latitude degree pos.galactic.lat double nullable ctrpart_3p6_cm The 3.6-cm Counterpart Number for Each Source meta.id.cross short nullable ref_ra_dec Reference Flag Indicates Origin of 8.4-GHz Position meta.ref;pos char 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