8052A VIII/52A The MIT-Green Bank 5GHz Survey C L Bennett C R Lawrence B F Burke J N Hewitt J Mahoney Astrophys. J. Suppl. Ser. 61 1 1986 1986ApJS...61....1B G I Langston M B Heflin S R Conner J Lehar C L Carrilli B F Burke Astrophys. J. Suppl. Ser. 72 621 1990 1990ApJS...72..621L M Griffith G Langston M Heflin S Conner J Lehar B Burke Astrophys. J. Suppl. Ser. 74 129 1990 1990ApJS...74..129G M Griffith G Langston M Heflin S Conner B Burke Astrophys. J. Suppl. Ser. 75 801 1991 1991ApJS...75..801G VIII/14 : 87GB Radio Sources 4.85 GHz (Gregory, Condon 1991) A 4.85 GHz sky survey. (Condon+ 1994) =1994AJ....107.1829C 90GB 4.85 GHz Sky Maps (Condon+ 1995) =1995ADIL...JC...06C Condon, J. J., and Broderick, J. J. 1985, AJ, 90, 2540 =1985AJ.....90.2540C Douglas, J. N., Bash, F. N., Torrence, G. W., and Wolfe, C. 1980, The Texas Survey: Preliminary +18 deg Strip (Univ. Texas Pub. Astr. No. 17). =1980PAUTx..17....1D Radio continuum Radio sources radio sources: general radio sources: identifications The MIT-Green Bank 5 GHz survey catalog was produced from four separate surveys with the National Radio Astronomy Observatory (NRAO) 91m transit telescope (Bennett et al., 1986ApJS...61....1 (MG1); Langston et al., 1990ApJS...72..621 (MG2); Griffith et al., 1990ApJS...74..129 (MG3); Griffith et al. 1991ApJS...75..801 (MG4)). The sky coverage of the various surveys is 00h < RA < 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; and 15h30m < RAB < 02h30m; +37.00d < DECB < +50d58'48" for MG4; 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), and for MG1-MG4 sources also identified in the NRAO 1400 MHz Survey (Condon and Broderick 1985). Notice: Original names were expanded by H.Andernach to MGn_Jhhmmss+ddmm, as suggested by Glen Langston on 25-Mar-1998 in reply to an inquiry by the IAU TG on Designations.

Name Source name sources with signal-to-noise ratios less than 5 are listed as 'MG1s...' --- RAh right ascension B1950 h RAm right ascension B1950 min RAs right ascension B1950 s DE- declination sign --- DEd declination B1950 deg DEm declination B1950 arcmin DEs declination B1950 arcsec l_Flux Flux density limit flag blank if 'Flux' is actual flux density '>' if 'Flux' is lower limit on flux density (MG1 fluxes over 5 Jy are listed as "> 5000" due to receiver saturation.) --- Flux Green Bank flux density at 4.830 or 4.775 GHz mJy n_Flux Flux note flag blank if frequency is 4.830 GHz (MG2-4) '*' if frequency is 4.775 GHz (MG1) --- l_S/N Signal-to-noise limit flag blank if 'S/N' is actual signal-to-noise '>' if 'S/N' is lower limit on signal-to-noise (MG1 S/N values over 100 are listed as ">99.9".) --- S/N Signal-to-noise ratio of the detection, or lower limit on signal-to-noise. --- G Group containing the source G is defined by the north or south survey detecting the source and the source location in the survey. Sources with b > +10 deg and detected in the south, north, or both surveys are assigned to groups 0, 1, 2. Sources lying in regions observed only once or at low Galactic latitude |b| < 10 deg, and detected in the south, north, or both surveys are assigned to groups 3, 4, or 5. Sources in the region observed twice but with b < -10 deg and detected in south, north, or both surveys, are assigned to groups 6, 7, or 8. --- alpha The spectral index of the source, where Flux {prop.to.} {nu}^alpha^ --- n_alpha Spectral index note flag blank if spectral index derived using NRAO 1400 MHz and 4.830 GHz observations (MG2-4) "*" if derived using Texas 365 MHz and 4.775 GHz observations (MG1) --- Tom Sodroski SSDOO/ADC 1999Apr30This catalog was originally compiled by Dr. Heinz Andernach at the Universidad de Guanajuato. VIII_52A.xml