Astronomy and Astrophysics Supplement Series

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Issue		Astron. Astrophys. Suppl. Ser. Volume 142, Number 1, February II 2000
Page(s)		35 - 40
DOI		10.1051/aas:2000134

DOI: 10.1051/aas:2000134

Astron. Astrophys. Suppl. Ser. 142, 35-40

A high sensitivity HI survey of the sky at $\delta\leq$ $\delta\leq$ -25°

E.M. Arnal - E. Bajaja - J.J. Larrarte - R. Morras - W.G.L. Pöppel

Send offprint request: E.M. Arnal

Instituto Argentino de Radioastronomía, c.c. 5, (1894) Villa Elisa, Argentina
e-mail: arnal@iar.unlp.edu.ar; bajaja@orbis.conae.gov.ar; rimorras@isis.unlp.edu.ar; wpoppel@iar.unlp.edu.ar

Received July 19; accepted November 16, 1999

Abstract:

This paper reports on a high sensitivity $\lambda$ 21-cm neutral hydrogen survey of the sky south of $\delta\leq$ -25 $^\circ$ . A total of 50980 positions lying on a galactic coordinate grid with points spaced by ( $\bigtriangleup$ l, $\bigtriangleup$ b) = (0 $.\!\!^\circ$ 5/cos b, 0 $.\!\!^\circ$ 5), were observed with the 30 m dish of the Instituto Argentino de Radioastronomía (IAR). The angular resolution of the survey is HPBW = 30 $^\prime$ , and the velocity coverage spans the interval -450 $\rm\, km\, s^$ to +400 $\rm\, km\, s^$ (LSR). The velocity resolution is 1.27 $\rm\, km\, s^$ and the final rms noise of the entire database is $\sim$ 0.07 K. The brightness temperature scale is accurate to 5%.

Key words: surveys -- ISM: general -- Galaxy: general radio lines: ISM -- ISM: clouds

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A high sensitivity HI survey of the sky at -25°

Abstract:

A high sensitivity HI survey of the sky at $\delta\leq$ $\delta\leq$ -25°