Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21731008b&link_type=abstract
American Astronomical Society, AAS Meeting #217, #310.08; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Zw 229-015 is a low-redshift (z=0.028) Seyfert 1 galaxy in the Kepler field, and is one of the brightest active galaxies being monitored by the Kepler mission. In order to determine the black hole mass in this object from H-beta reverberation mapping, we have obtained nightly spectroscopic observations with the Kast Spectrograph at the Lick 3-m telescope during the dark runs beginning in June 2010, with 38 epochs of data in hand as of late September. We have also obtained nightly V-band imaging with the Katzman Automatic Imaging Telescope at Lick Observatory and with the 0.9-m telescope at the Brigham Young University West Mountain Observatory. We detect strong variability in the source, which exhibited more than a factor of 2 change in broad H-beta flux during the monitoring period. We will present measurements of the H-beta lag relative to the continuum variations, and an estimate of the black hole mass based on the H-beta lag and line width. As a Kepler target, Zw 229-015 will eventually have one of the highest-quality optical light curves ever measured for any active galaxy, and the black hole mass determined from reverberation mapping will serve as a benchmark for testing relationships between black hole mass and continuum variability characteristics in active galactic nuclei.
Barth Aaron J.
Filippenko Alexei V.
Gorjian Varoujan
Joner Michael D.
Li Wangrong
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