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Published October 10, 2009 | Published
Journal Article Open

Optical Spectroscopy of Bright Fermi LAT Blazars


We report on Hobby-Eberly Telescope and Palomar 5 m spectroscopy of recently identified γ-ray blazars in the Fermi LAT Bright Source List. These data provide identifications for 10 newly discovered γ-ray flat spectrum radio quasars and six new BL Lacertae (BL Lac) objects plus improved spectroscopy for six additional BL Lac objects. We substantially improve the identification completeness of the bright LAT blazars and give new redshifts and z constraints, new estimates of the black hole masses, and new measurements of the optical spectral energy distribution.

Additional Information

© 2009 American Astronomical Society. Received 2009 June 1; accepted 2009 August 25; published 2009 September 23. The HET is a joint project of the University of Texas at Austin, the Pennsylvania State University, Stanford University, Ludwig-Maximilians-Universitaet Muenchen, and Georg- August-Universitaet Goettingen. The HET is named in honor of its principal benefactors, William P. Hobby and Robert E. Eberly. The Marcario Low Resolution Spectrograph is named for Mike Marcario of High Lonesome Optics, who fabricated several optics for the instrument but died before its completion. The LRS is a joint project of the Hobby*Eberly Telescope partnership and the Instituto de Astronoma de la Universidad Nacional Autonoma de Mexico. M.S.S. and S.E.H. are supported by NASA under grants NNX08AW30G and NAS5-00147. A.C.S.R. is supported by the NSF under grant AST-0808050.

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Published - Shaw2009p6137Astrophys_J.pdf


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