Selection criteria for 1800 MIT-VLA snapshots of PMN radio sources are described, and 6 new MG & PMN lens candidates are presented.

The MIT-Green Bank IV (MG IV) 5 GHz survey covers 0.504 sr of sky in the right ascension range 15.5h-2.5h, between +37.00-degrees 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)3 91 m transit telescope. The north survey was produced from data collected while scanning the telescope north from +39.00-degrees to +50.98-degrees declination, and the south survey from data collected from scans from +48.98-degrees 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-degrees 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 (Condon and Broderick 1985). A comparison of the spectral index distributions between +/- 10-degrees Galactic latitude is presented.

view Abstract Citations (48) References (9) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Third MIT--Green Bank 5 GHz Survey Griffith, Mark ; Langston, Glen ; Heflin, Mike ; Conner, Sam ; Lehar, Joseph ; Burke, Bernard Abstract The MIT-Green Bank III (MG III) 5 GHz survey covers 1.11 sr of sky in the right ascension range 16.5^h^-5^h^ between +17^deg^ and +39.15^deg^ declination (B1950). The final MG III catalog contains 4761 sources detected with a signal-to-noise ratio > 5. The catalog was produced from two separate north and south surveys with the National Radio Astronomy Observatory (NRAO)^3^ 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 source lists in a twice observed comparison region, lying between +19.15^deg^ and +37^deg^ and below -10^deg^ Galactic latitude. The comparison region covers 0.569 sr of sky and contains 2412 sources. In this region, the MG III catalog contains 917 sources brighter than 90 mJy and is shown to be 99.8 +/- 0.4% complete at this flux density level. Spectral indices are computed for sources identified in the NRAO 1400 MHz Survey (published by Condon and Broderick). A comparison of the spectral index distributions below -10^deg^ and between +/- 10^deg^ Galactic latitude is presented. Publication: The Astrophysical Journal Supplement Series Pub Date: September 1990 DOI: 10.1086/191495 Bibcode: 1990ApJS...74..129G Keywords: Radio Sources (Astronomy); Sky Surveys (Astronomy); Astronomical Catalogs; Gravitational Lenses; Astronomy; RADIO SOURCES: GENERAL; RADIO SOURCES: IDENTIFICATIONS full text sources ADS | data products NED (4756) CDS (3) SIMBAD (1) Related Materials (2) Catalog: 1999yCat.8052....0B Catalog: 2003yCat.8052....0B

view Abstract Citations (52) References (10) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Second MIT--Green Bank 5 GHz Survey Langston, Glen I. ; Heflin, Michael B. ; Conner, Sam R. ; Lehar, Joseph ; Carilli, Chris L. ; Burke, Bernard F. Abstract The MHT-Green Bank II (MG II) 5-GHz survey covers 1.51 sr of sky in the right ascension range 4-21 h between +17 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 NRAO 91-m transit telescope. Spectral indices are computed for sources identified in the NRAO 1400-MHz Survey (Condon and Broderick, 1985). A comparison of the spectral-index distributions for sources above and below 10 deg Galactic latitude is presented. Publication: The Astrophysical Journal Supplement Series Pub Date: March 1990 DOI: 10.1086/191427 Bibcode: 1990ApJS...72..621L Keywords: Radio Sources (Astronomy); Sky Surveys (Astronomy); Astronomical Catalogs; Signal To Noise Ratios; Telescopes; Very Large Array (Vla); Astrophysics; RADIO SOURCES: GENERAL; RADIO SOURCES: IDENTIFICATIONS; RADIO SOURCES: SPECTRA full text sources ADS | data products NED (6179) SIMBAD (12) CDS (3) Related Materials (2) Catalog: 1999yCat.8052....0B Catalog: 2003yCat.8052....0B