BVRI CCD-photometry of comparison stars in the fields of galaxies with active nuclei. VIстатья
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Дата последнего поиска статьи во внешних источниках: 20 мая 2014 г.
Аннотация:Data are presented from observations in the B,V,R, and I bands of 200 comparison stars in the fields of 18 active galactic nuclei (AGN) with right ascensions from 0 to 9 hours over a wide range of stellar magnitudes. Most of the AGN are blazars and quasars. The B,V,R, and I magnitudes of the overwhelming majority of these stars were not known previously. Finding charts for these stars are provided. These observations can be used for differential photometry of galactic nuclei.