EDP Sciences
Free access
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 )

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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