Free Access
Astron. Astrophys. Suppl. Ser.
Volume 119, Number 1, October_I 1996
Page(s) 115 - 151
Published online 15 October 1996
Stray--radiation correction as applied to the Leiden/Dwingeloo survey of HI in the Galaxy DOI: 10.1051/aas:1996233

Astronomy and Astrophysics Supplement Series, Vol. 119, October I 1996, 115-151

Stray--radiation correction as applied to the Leiden/Dwingeloo survey of HI in the Galaxy

Dap Hartmann , P.M.W. Kalberla , W.B. Burton and U. Mebold

Send offprint requests to: W.B. Burton

Sterrewacht Leiden, Postbus 9513, 2300 RA, Leiden, The Netherlands
Harvard--Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, U.S.A.
Radioastronomisches Institut der Universität Bonn, Auf dem Hugel 71, 53121 Bonn, Germany

Received November 27, 1995; accepted February 6, 1996


This article describes the stray--radiation correction that was applied to the HI observations of the Leiden/Dwingeloo survey of Hartmann & Burton. This correction involved convolving the empirically--determined antenna pattern with the measured all--sky HI distribution. The importance of the correction is demonstrated and practice regarding its application described. The general algorithm used here is presented. The results obtained with this algorithm are compared to those following from other methods. The 0.07 K sensitivity level of the survey depends critically on the success of the stray--radiation correction.
Key words: methods: data analysis --- surveys --- radio lines: ISM --- telescopes

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