Journal Article

Mass of the black hole in the Seyfert 1.5 galaxy H 0507+164 from reverberation mapping

C. S. Stalin, S. Jeyakumar, R. Coziol, R. S. Pawase and S. S. Thakur

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 416, issue 1, pages 225-231
Published in print September 2011 | ISSN: 0035-8711
Published online August 2011 | e-ISSN: 1365-2966 | DOI:
Mass of the black hole in the Seyfert 1.5 galaxy H 0507+164 from reverberation mapping

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We present the results of our optical monitoring campaign of the X-ray source H 0507+164, a low-luminosity Seyfert 1.5 galaxy at a redshift z= 0.018. Spectroscopic observations were carried out during 22 nights in 2007, from 2007 November 21 to 2007 December 26. Photometric observations in the R band for 13 nights were also obtained during the same period. The continuum and broad-line fluxes of the galaxy were found to vary during our monitoring period. The R-band differential light curve with respect to a companion star also shows a similar variability. Using cross-correlation analysis, we estimated a time-delay of τcen= 3.01+0.42− 1.84 d (in the rest frame) of the response of the broad Hβ line fluxes to the variations in the optical continuum at 5100 Å. Using this time-delay and the width of the Hβ line, we estimated the radius for the broad-line region of 2.53+0.35− 1.55× 10−3 pc and a black hole mass of 9.62+0.33− 3.73× 106 M.

Keywords: galaxies: active; galaxies: individual: H 0507+164; galaxies: Seyfert

Journal Article.  4319 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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