The photographic photometry of the variables no. 24, 28 and 43 of globular cluster M15

Details The photographic photometry of the variables no. 24, 28 and 43 of globular cluster M15 The photographic photometry of the variables no. 24, 28 and 43 of globular cluster M15

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982acasn..23..118c&link_type=abstract

Acta Astronomica Sinica, vol. 23, June 1982, p. 118-124. In Chinese, with abstract in English.

Astronomy and Astrophysics

Astronomy

1

Astronomical Photography, Cepheid Variables, Globular Clusters, Light Curve, Stellar Spectrophotometry, Astronomical Observatories, Data Reduction, Stellar Magnitude

Scientific paper

The measurement and reduction procedures for photographs of the RR Lyr variables No. 24, 28, and 43 of the globular cluster M15 are described. All plates were measured manually to provide the correct position chosen for the real background of a measuring star on a plate. After a first order correction by simply subtracting from the adjacent sky density of a given star, the dispersion in the plot of density versus the magnitudes of the comparison stars decreased. The abrupt changes of the light curve forms of the variables No. 24 and 28 are shown. The results for the stars are compared with new results published elsewhere.

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