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Title:
The Bell Laboratories H I survey
Authors:
Stark, Antony A.; Gammie, Charles F.; Wilson, Robert W.; Bally, John; Linke, Richard A.; Heiles, Carl; Hurwitz, Mark
Affiliation:
AA(AT&T Bell Laboratories, Holmdel, NJ), AB(AT&T Bell Laboratories, Holmdel, NJ), AC(AT&T Bell Laboratories, Holmdel, NJ), AD(AT&T Bell Laboratories, Holmdel, NJ), AE(AT&T Bell Laboratories, Holmdel, NJ), AF(California, University, Berkeley), AG(California, University, Berkeley)
Publication:
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 79, March 1992, p. 77-104. Research supported by NSF. (ApJS Homepage)
Publication Date:
03/1992
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
H I REGIONS, HYDROGEN ATOMS, INTERSTELLAR MATTER, LINE SPECTRA, RADIO SPECTRA, SKY SURVEYS (ASTRONOMY), EMISSION SPECTRA, INTERSTELLAR EXTINCTION, MILKY WAY GALAXY
DOI:
10.1086/191645
Bibliographic Code:
1992ApJS...79...77S

Abstract

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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