The Bell Laboratories H I survey

Details The Bell Laboratories H I survey The Bell Laboratories H I survey

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...79...77s&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 79, March 1992, p. 77-104. Research supported by NSF.

Astronomy and Astrophysics

Astronomy

1115

H I Regions, Hydrogen Atoms, Interstellar Matter, Line Spectra, Radio Spectra, Sky Surveys (Astronomy), Emission Spectra, Interstellar Extinction, Milky Way Galaxy

Scientific paper

Results of observations of the sky north of delta = -40 deg in the 21-cm line of atomic hydrogen are reported. The survey covers a velocity range of 654 km/s centered on the Galactic standard of rest, with 5.3-km/s wide filters. Calibration and reduction of the observations are described. The survey is presented as a series of images of the sky, each covering a 10-km/s wide velocity range. This survey is distinguished by its sensitivity to low surface brightness features (TA is approximately equal to 50 mK) and relative freedom from sidelobe contamination. High-velocity clouds are extracted and cataloged automatically. At the resolution of the survey, the lowest H I column density in the sky is 5.7 x 10 exp 19/cm.

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