NED Abstract 
Copyright by American Astronomical Society.
Reproduced by permission

1990ApJS...72..621L

                 THE SECOND MIT-GREEN BANK 5 GHz SURVEY

    GLEN I. LANGSTON, MICHAEL B. HEFLIN, SAM R. CONNER, JOSPEH LEHAR
                CHRIS L. CARRILLI, AND BERNARD F. BURKE
             Received 1908 May 15; accepted 1989 August 24

  The MIT-Green Bank II (MG II) 5 GHz survey covers 1.51 sr of sky in
the right ascension range 4^h^-21^h^ between +17^deg^ and +39.15^deg^
declination (J2000.0). The final MG II catalog contains 6182 sources
detected with a signal-to-noise ratio greater than 5. The MG II flux
density limit is 41 mJy. The catalog was produced from two separate north
and south surveys with the National Radio Astronomy Observatory (NRAO) 91 m
transit telescope. The north survey was produced from data collected while
scanning the telescope north from +19.0^deg^ to +39.15^deg^ declination and
the south survey from data collected from scans from +37.15^deg^ to
+17^deg^ declination. The completeness and reliability of the final source
list is checked by examination of north and south lists in a twice observed
comparison region, lying between +19.15^deg^ and +37^deg^ (B1950.0) and
above +10^deg^ north Galactic latitude. The comparison region covers 0.884
sr of sky and contains 3384 sources. In this region, the MG II catalog
contains 1387 sources brighter than 90 mJy and is shown to be 99.9 +/- 0.9%
complete at this flux density level. Spectral indices are computed for
sources identified in the NRAO 1400 HMz Survey (published by Condon and
Broderick in 1985). A comparison of the spectral index distributions for
sources above and below 10^deg^ Galactic latitude is presented.

Subject headings: radio sources: general - radio sources: identifications -
radio sources: spectra