Investigation of the influence of the filters degeneration on BV CCD photometry.

Details Investigation of the influence of the filters degeneration on BV CCD photometry. Investigation of the influence of the filters degeneration on BV CCD photometry.

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ppmto..19...25y&link_type=abstract

Publ. Purple Mt. Obs., Vol. 19, No. 1, p. 25 - 31

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Bv Photometry: Filters

Scientific paper

The new Tek 1024×1024 CCD camera installed on the Zeiss 1-meter reflector of Yunnan Observatory is a good system. The mechanical part of the camera was re-built and the CCD chip replaced by another similar Tek 1024×1024 chip, since July of 1998. However, the filters used originally are not changed. Unfortunately, the glass filters become mould. The mould has already intruded into the inside of the glass, that can not be recovered. The attempt failed to get rid of the influence of the mould by flat fielding. Evidences are given in this paper. The authors are afraid that all the photometry carried out during this period might suffer from this trouble.

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