Stray–radiation correction as applied to the Leiden/Dwingeloo survey of Hi in the Galaxy
Sterrewacht Leiden, Postbus 9513, 2300 RA, Leiden, The Netherlands
2 Harvard–Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, U.S.A.
3 Radioastronomisches Institut der Universität Bonn, Auf dem Hugel 71, 53121 Bonn, Germany
Send offprint request to: W.B. Burton
Accepted: 6 February 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
© European Southern Observatory (ESO), 1996