MGIV (Fourth MIT-Green Bank) 5GHz Survey (Griffith+ 1991)

Details MGIV (Fourth MIT-Green Bank) 5GHz Survey (Griffith+ 1991) MGIV (Fourth MIT-Green Bank) 5GHz Survey (Griffith+ 1991)

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ycat..20750801g&link_type=abstract

VizieR On-line Data Catalog: J/ApJS/75/801. Originally published in: 1991ApJS...75..801G

Astronomy and Astrophysics

Astronomy

Radio Sources, Surveys

Scientific paper

The MIT-Green Bank IV (MG IV) 5 GHz survey covers 0.504 sr of sky in the right ascension range 15.5 to 2.5 hours, between +37.00 and +50.98 degrees declination (B1950). The final MG IV catalog contains 3427 sources detected with a signal-to-noise ratio greater than 5. The catalog was produced from two separate north and south surveys with the National Radio Astronomy Observatory (NRAO) 91m transit telescope. The north survey was produced from data collected while scanning the telescope north from +39.0 to +50.98 degrees declination and the south survey from data collected from scans from +48.98 to +37.00 degrees declination. The completeness and reliability of the final source list is checked by examination of north and south source lists in a twice observed comparison region, lying between +39.15 and +48.83 degrees declination and excluding the area between +/-10 degrees Galactic latitude. The comparison region covers 0.270 sr of sky and contains 1094 sources. In this region, the MG IV catalog contains 423 sources brighter than 90 mJy and is shown to be 99.1 +/- 1.2% complete at this flux density level. Spectral indices are computed for sources identified in the NRAO 1400 MHz Survey (published by Condon and Broderick in 1985). A comparison of the spectral index distributions between +/- 10 and outside of +/- 10 degrees Galactic latitude is presented. (1 data file).

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