MIT-GB ivo://nasa.heasarc/mitgb6cm NASA/GSFC HEASARC Bennett et al.; Langston et al.; Griffith et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The MIT-Green Bank 5 GHz Survey Catalog was produced from four separate surveys with the National Radio Astronomy Observatory (NRAO) 91m transit telescope, the results from which were presented in papers by Bennett et al., 1986ApJS...61....1B (MG1), Langston et al., 1990ApJS...72..621L (MG2), Griffith et al., 1990ApJS...74..129G (MG3), and Griffith et al. 1991ApJS...75..801G (MG4). The sky coverage of the various surveys is: <pre> 00h < RAB < 24h, -00d30'13" < DECB < +19d29'47" for MG1 04h < RAJ < 21h, +17.0d < DECJ < +39d09' for MG2 16h30m < RAB < 05h, +17d < DECB < +39d09' for MG3 15h30m < RAB < 02h30m, +37.00d < DECB < +50d58'48" for MG4 </pre> where RAB and DECB refer to B1950 coordinates, and RAJ and DECJ refer to J2000 coordinates. The catalog contains 20344 sources detected with a signal-to-noise ratio greater than 5 and 3836 possible detections (MG1) with a signal-to-noise ratio less than 5. Spectral indices are computed for MG1 sources also identified in the Texas 365 MHz survey (Douglas et al. 1980, Univ. Texas Pub. Astr. No. 17), and for MG1-MG4 sources also identified in the NRAO 1400 MHz Survey (Condon and Broderick 1985, AJ, 90, 2540 = 1985AJ.....90.2540C). This online catalog was created by the HEASARC in October 2003 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/VIII/52B">CDS catalog VIII/52B</a> (the file mgcat.dat). This is a service provided by NASA HEASARC . 1991ApJS...75..801G https://heasarc.gsfc.nasa.gov/W3Browse/all/mitgb6cm.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=mitgb6cm& GET text/xml 180 99999 true 163.73625 -0.76666667 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=mitgb6cm GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_mitgb6cm&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0833333333333333 Radio public mitgb6cm MIT-Green Bank 5-GHz Survey Catalog name Recommended Source Designation 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_6_cm_limit Flag Indicates Flux Density Lower Limit meta.code.error;phot.flux.density;em.radio.3-6GHz char nullable flux_6_cm Flux Density at 4.830 or 4.775 GHz (mJy) mJy phot.flux.density;em.radio.3-6GHz int nullable spectral_index Spectral Index of Source spect.index double nullable group_number Group Containing the Source meta.note short nullable flux_6_cm_flag Flag Indicates 4.775-GHz Flux Density (MG1), Blank Indicates 4.830-GHz (MG2-4) meta.code;phot.flux.density;em.radio.3-6GHz char nullable survey Survey (MG) Number meta.id;obs.field short nullable snr_6_cm_limit Flag Indicates Signal-to-Noise Lower Limit stat.snr char nullable lii Galactic Longitude degree pos.galactic.lon double nullable source_flag Flag Indicates Sources with S/N Ratio Less Than 5 [s] meta.code;src char nullable bii Galactic Latitude degree pos.galactic.lat double nullable snr_6_cm Signal-to-Noise Ratio of the Detection or Lower Limit on Signal-to-Noise stat.snr double nullable original_name Original Catalog Designation of Source meta.id char nullable spectral_index_flag Flag Indicates Spectral Index Derived Using 365-MHz and 4.775-GHz Observations meta.code;spect.index 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