CCD photometry in the Vilnius photometric systems. II - Analysis of a region in Lyra

Astronomy and Astrophysics – Astrophysics

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Astronomical Photometry, Classifications, Interstellar Extinction, Star Distribution, Charge Coupled Devices, Stellar Luminosity, Stellar Spectra

Scientific paper

Two-dimensional classification of 216 stars down to 17 mag based on their seven color photoelectric and CCD photometry in the Vilnius system is presented. Except for the normal stars, several subdwarfs, metal-deficient giants, and stars of other peculiarities are suspected. Interstellar extinction is determined for normal stars in two areas north and south of globular cluster M56, as well as for a 1 sq deg area around M56. The mean value of A(v) outside the galactic dust layer is about 0.75 mag.

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