AAS 199th meeting, Washington, DC, January 2002
Session 138. AGN - Surveys
Display, Thursday, January 10, 2002, 9:20am-4:00pm, Exhibit Hall

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[138.21] A Photometric Study of Selected Active Galactic Nuclei

R.D. Levine (University of Pittsburgh and SARA), K.S. Rumstay (Valdosta State University and SARA)

Since 1995 the SARA 0.9-m telescope at Kitt Peak has been used to monitor continuum fluxes from a sample of twelve active galaxies. A number of these have been the subject of extensive monitoring campaigns by the International AGN Watch. During the period 2001 May 26-30 a series of CCD images were obtained of the objects NGC 4151, NGC 5548, Mrk 817, Mrk 509, Akn 564, and 3C-390.3 with the SARA telescope. Wide-band V, R, and I magnitudes derived from these images are presented and compared with previous brightness determinations. Of the objects observed the broad-line radio galaxy 3C-390.3 exhibits the greatest change in brightness; it has dimmed by more than one magnitude since 1995. On the final night (May 29-30) of observation 3C-390.3 was observed continuously in the I band to search for evidence of microvariability. The observed brightness fluctuations were less than 0.05 magnitude, with no systematic variation.

This work is supported by National Science Foundation grant AST-0097616 and by faculty development and research grants from Valdosta State University.

The author(s) of this abstract have provided an email address for comments about the abstract: krumstay@valdosta.edu

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