Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990msngr..59...41t&link_type=abstract
ESO Messenger (ISSN 0722-6691), March 1990, p. 41-45.
Astronomy and Astrophysics
Astronomy
4
Astronomical Photometry, Galactic Bulge, Globular Clusters, Planetary Nebulae, Variable Stars, Astronomical Photography, Optical Properties, Sagittarius Constellation
Scientific paper
U, B, V, and R plates for a 10 deg x 10 deg area centered on star 45 Oph are analyzed. The detection and measurement of the data are described. The variable stars detected in this area are studied. Consideration is given to planetary nebulae, galaxies in a direction near the galactic center, and open and globular stellar clusters. The data reveal 621 red variable stars in field O; 1592 red variable stars in field A and D; and 1238 red variable stars in field B. It is noted that the observations are useful for the study of objects populating the galactic bulge.
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