The bell laboratories H I survey

Antony A. Stark; Charles F. Gammie; Robert W. Wilson; John Bally; Richard A. Linke; Carl Heiles; Mark Hurwitz

doi:10.1086/191645

The bell laboratories H I survey

Antony A. Stark, Charles F. Gammie, Robert W. Wilson, John Bally, Richard A. Linke, Carl Heiles, Mark Hurwitz

Research output: Contribution to journal › Article › peer-review

Abstract

The sky north of δ= -40° was observed in the 21 cm line of atomic hydrogen with the FWHM = 2° beam of the 20 foot horn reflector at AT&T Bell Laboratories, Crawford Hill. The survey covers a velocity range of 654 km s^-1 centered on the Galactic standard of rest, with 5.3 km s^-1 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^-1 wide velocity range. This survey is distinguished by its sensitivity to low surface brightness features ( T_A ≈ 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 × 10¹⁹ cm^-2.

Original language	English (US)
Pages (from-to)	77-104
Number of pages	28
Journal	Astrophysical Journal, Supplement Series
Volume	79
Issue number	1
DOIs	https://doi.org/10.1086/191645
State	Published - Mar 1992
Externally published	Yes

Keywords

ISM: general
Radio lines: atomic
Surveys

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Online availability

10.1086/191645

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abstract = "The sky north of δ= -40° was observed in the 21 cm line of atomic hydrogen with the FWHM = 2° beam of the 20 foot horn reflector at AT&T Bell Laboratories, Crawford Hill. The survey covers a velocity range of 654 km s-1 centered on the Galactic standard of rest, with 5.3 km s-1 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-1 wide velocity range. This survey is distinguished by its sensitivity to low surface brightness features ( TA ≈ 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 × 1019 cm-2.",

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year = "1992",

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T1 - The bell laboratories H I survey

AU - Stark, Antony A.

AU - Gammie, Charles F.

AU - Wilson, Robert W.

AU - Bally, John

AU - Linke, Richard A.

AU - Heiles, Carl

AU - Hurwitz, Mark

PY - 1992/3

Y1 - 1992/3

N2 - The sky north of δ= -40° was observed in the 21 cm line of atomic hydrogen with the FWHM = 2° beam of the 20 foot horn reflector at AT&T Bell Laboratories, Crawford Hill. The survey covers a velocity range of 654 km s-1 centered on the Galactic standard of rest, with 5.3 km s-1 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-1 wide velocity range. This survey is distinguished by its sensitivity to low surface brightness features ( TA ≈ 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 × 1019 cm-2.

AB - The sky north of δ= -40° was observed in the 21 cm line of atomic hydrogen with the FWHM = 2° beam of the 20 foot horn reflector at AT&T Bell Laboratories, Crawford Hill. The survey covers a velocity range of 654 km s-1 centered on the Galactic standard of rest, with 5.3 km s-1 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-1 wide velocity range. This survey is distinguished by its sensitivity to low surface brightness features ( TA ≈ 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 × 1019 cm-2.

KW - ISM: general

KW - Radio lines: atomic

KW - Surveys

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JF - Astrophysical Journal, Supplement Series

IS - 1

ER -

The bell laboratories H I survey

Abstract

Keywords

ASJC Scopus subject areas

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