DISCOVERY OF A GeV BLAZAR SHINING THROUGH THE GALACTIC PLANE
| Autor: | Justin Vandenbroucke, Roger W. Romani, A. Van Etten, Danny Steeghs, Grzegorz Madejski, Lars Fuhrmann, Davide Donato, R. Buehler, Manuel A. P. Torres, S. E. Healey, A. B. Hill, Kurtis A. Williams, Keith Bechtol, Andrea Bellini, Christian Knigge, M. Santander-Garcia, C. C. Cheung, Francesca Civano, M. S. Shaw, Stefan Funk, Michael Bolte, Marco Ajello |
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| Rok vydání: | 2010 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 01 natural sciences 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Blazar 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics QB High Energy Astrophysical Phenomena (astro-ph.HE) Physics 010308 nuclear & particles physics Astronomy and Astrophysics Quasar Galactic plane Redshift Galaxy Space and Planetary Science Spectral energy distribution Astrophysics - High Energy Astrophysical Phenomena Equivalent width Astrophysics - Cosmology and Nongalactic Astrophysics Fermi Gamma-ray Space Telescope |
| Zdroj: | The Astrophysical Journal |
| ISSN: | 2041-8213 2041-8205 |
| Popis: | The \emph{Fermi} Large Area Telescope (LAT) discovered a new gamma-ray source near the Galactic plane, \object{Fermi J0109+6134}, when it flared brightly in 2010 February. The low Galactic latitude (b =-1.2\degr) indicated that the source could be located within the Galaxy, which motivated rapid multi-wavelength follow-up including radio, optical, and X-ray observations. We report the results of analyzing all 19 months of LAT data for the source, and of X-ray observations with both \emph{Swift} and the \emph{Chandra X-ray Observatory}. We determined the source redshift, z =0.783, using a Keck LRIS observation. Finally, we compiled a broadband spectral energy distribution (SED) from both historical and new observations contemporaneous with the 2010 February flare. The redshift, SED, optical line width, X-ray absorption, and multi-band variability indicate that this new GeV source is a blazar seen through the Galactic plane. Because several of the optical emission lines have equivalent width >5��, this blazar belongs in the flat-spectrum radio quasar category. 9 pages, 4 figures |
| Databáze: | OpenAIRE |
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