The Accuracy of Hα CCD Photometry

Details The Accuracy of Hα CCD Photometry The Accuracy of Hα CCD Photometry

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jass...11..208k&link_type=abstract

Journal of Astronomy and Space Science, vol. 11, no. 2, p. 208-231.

Astronomy and Astrophysics

Astronomy

Scientific paper

We have undertaken CCD observations of field standard stars with Hα photometric system to investigate the reliability of Hα CCD photometry. Flat fielding with dome flat and sky flat for HαW and HαN filter was compared with that of B filter in UBV system and, from these, we have not found any difference. It was confirmed that there is a good linear relationship between our Hα values observed with 2.3m reflector and standard values. However, Hα values observed with 60 reflector at Sobaeksan Astronomy Observatory showed very poor relationship. To investigate the accuracy of Hα CCD photometry for fainter objects, open cluster NGC2437 was observed and reduced with DoPHOT, and the results were compared with those for photoelectric photometry of Stetson(1981).

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