Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106.1679k&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 106, no. 4, p. 1679-1684.
Astronomy and Astrophysics
Astronomy
1
Astronomical Photometry, Atmospheric Attenuation, Interstellar Extinction, Light Curve, Temperature Effects, Atmospheric Correction, Instrument Errors, Optical Filters, Stellar Color
Scientific paper
The largest systematic errors in differential photoelectric photometry are the atmospheric effect and the temperature effect arising from the color difference between program star and comparison star. In the case of AR Lac, the maximum difference in magnitude found by using individual extinction coefficients of comparison star and check star proved to be about 0.05 mag. These results strongly suggest that the correction of secondary extinction effects in differential photoelectric photometry is very important. The temperature coefficient of the whole photometer is larger than 0.0012 mag/C. This means that the temperature effect must be considered to avoid systematic errors when the temperature variation is above 10 C.
Kim Hee-Soo
Park Hong-Suh
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