THE 2ND MIT-GREEN-BANK 5 GHZ SURVEY

The MIT-Green Bank II (MG II) 5 GHz survey covers 1.51 sr of sky in the right ascension range 4h-21h between +17° and +39°.15 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 to +39°. 15 declination and the south survey from data collected from scans from +37°.15 to +17° 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 +19°.15 and +37° (B1950.0) and above +10° 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 MHz Survey (published by Condon and Broderick in 1985). A comparison of the spectral index distributions for sources above and below 10° Galactic latitude is presented.