Principles of the data reduction and first results of the fastscanning method for (sub)millimeter astronomy

Free access article

Issue		A&A Volume 383, Number 3, March I 2002


Page(s)		1088 - 1099
Section		Instruments, observational techniques and data processing
DOI		http://dx.doi.org/10.1051/0004-6361:20011617

A&A 383, 1088-1099 (2002)
DOI: 10.1051/0004-6361:20011617

Principles of the data reduction and first results of the fastscanning method for (sub)millimeter astronomy

B. Weferling, L. A. Reichertz, J. Schmid-Burgk and E. Kreysa

Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
e-mail: reichertz@mpifr-bonn.mpg.de; p223jsb@mpifr-bonn.mpg.de; ekreysa@mpifr-bonn.mpg.de

(Received 22 June 2001 / Accepted 7 November 2001 )

Abstract
Ground-based astronomical continuum observations at (sub)millimeter wavelengths are especially difficult, because the emission of the atmospheric water vapor is usually much stronger than any astronomical signal. We present here the principles of the data reduction and first results of a new observing method that accounts for the atmospheric emission by measuring its total power with an array of detectors. We call the method fastscanning. We outline the data reduction for (sub)millimeter bolometer arrays and demonstrate the effectiveness by presenting results of astronomical observations done with the new method.

Key words: methods: observational -- instrumentation: detectors -- methods: data analysis -- atmospheric effects

Offprint request: B. Weferling, weferlin@mpifr-bonn.mpg.de

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