Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.1114m&link_type=abstract
American Astronomical Society, 201st AAS Meeting, #11.14; Bulletin of the American Astronomical Society, Vol. 34, p.1111
Astronomy and Astrophysics
Astronomy
Scientific paper
We present CCD observations of three Type I Seyfert galaxies (Akn 120, Mrk 509, and Akn 564) obtained with the SARA 0.9-m telescope during the period May 2001 to September 2002. Variations of a few tenths of a magnitude were observed for all three objects; each exhibits a correlation between brightness (V) and color (V-R). The galaxy Akn 564 exhibits an anomalous color pattern. It consistently appears brightest in the R band and slightly fainter in I and V; the flux in the B filter is significantly depressed. This may result from anomalous internal reddening; alternatively, published magnitudes for comparison stars in the Akn 564 field may be in error. Revised magnitudes for comparison stars in all three fields were derived from analysis of residuals in the photometric solutions of the images. This work is supported by National Science Foundation grant AST-0097616 and by faculty development and research grants from Valdosta State University.
McGregor Sarah L.
Rumstay Kenneth S.
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