Photographic photometry of three RR Lyrae variables of M15

Details Photographic photometry of three RR Lyrae variables of M15 Photographic photometry of three RR Lyrae variables of M15

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982cha%26a...6..204c&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 6, Issue 3, p. 204-208.

Astronomy and Astrophysics

Astrophysics

Scientific paper

In 1979 we took plates of M15 with the new one metre telescope of Yunnan Observatory. The RR Lyrae variables Nos. 24, 28, and 43 were measured and reduced at Purple Mountain Observatory. Comparison stars were chosen that are clear of crowded regions and were further screened according to their residuals, as described in the paper. Our results on these three variables are compared with recent results from California /4/ and Mt. Wilson Observatory /5/. The light curves of Nos. 24 and 28 show abrupt changes. Our observations of No. 43 exclude its period being 0d.395556, while fitting well the period 0d.396013

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