BVRI CCD-Photometry of Comparison Stars in the Neighborhoods of Galaxies with Active Nuclei. I

Astronomy and Astrophysics – Astronomy

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Extragalactic Astronomy, Agn, Comparison Stars, Photometry, Extragalactic Astronomy - Agn - Comparison Stars - Photometry

Scientific paper

Results are presented from CCD BVRI observations of comparison stars in the neighborhoods of 22 galaxies with active nuclei having right ascensions ranging from 0 to 12 hours, of which 19 are Seyfert galaxies. The observed stars have magnitudes ranging from V=11 to V=17. For stars brighter than V=14 the typical photometic error is 0.01m. The B, V, Rc, and Ic magnitudes of most of these stars were not known previously. 14′×14′ finding charts are included. These results can be used for differential photometry of the AGNs in the B, V, Rc, and Ic bands.

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