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Issue A&A
Volume 395, Number 1, November III 2002
Page(s) 347 - 356
Section Instruments, observational techniques and data processing
DOI http://dx.doi.org/10.1051/0004-6361:20021285



A&A 395, 347-356 (2002)
DOI: 10.1051/0004-6361:20021285

The Carlsberg Meridian Telescope CCD drift scan survey

D. W. Evans1, M. J. Irwin1 and L. Helmer2

1  Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK
2  Copenhagen University Observatory, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark

(Received 14 June 2002 / Accepted 28 August 2002 )

Abstract
This paper contains the general data reduction methods used in processing the data from the Carlsberg Meridian Telescope CCD drift scan survey. An efficient method to calibrate the fluctuations in the positions of the images caused by atmospheric turbulence is described. The external accuracy achieved is 36 mas in right ascension and declination. A description of the recently released catalogue is given.


Key words: astrometry -- methods: data analysis -- techniques: image processing -- techniques: photometric -- catalogues -- surveys

Offprint request: D. W. Evans, dwe@ast.cam.ac.uk

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