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Title: Discovery of a GeV Blazar Shining Through the Galactic Plane

Abstract

The Fermi Large Area Telescope (LAT) discovered a new gamma-ray source near the Galactic plane, Fermi J0109+6134, when it flared brightly in 2010 February. The low Galactic latitude (b = -1.2{sup o}) 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 Swift and the 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 obsorption, 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 {angstrom}, this blazar belongs in the flat-spectrum radio quasar category.

Authors:
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Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1023780
Report Number(s):
SLAC-PUB-14186
arXiv:1004.1413; TRN: US201120%%1099
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article
Journal Name:
Astrophys.J.718:L166-L170,2010
Additional Journal Information:
Journal Volume: 718
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COSMIC GAMMA SOURCES; EMISSION; GALAXIES; ENERGY SPECTRA; LINE WIDTHS; QUASARS; RED SHIFT; TELESCOPES; WIDTH; Astrophysics,ASTRO

Citation Formats

Vandenbroucke, J, Buehler, R, Ajello, M, Bechtol, K, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Bellini, A, /Padua U., Astron. Dept. /Baltimore, Space Telescope Sci., Bolte, M, /UC, Santa Cruz, Cheung, C C, /Naval Research Lab, Wash., D.C. /NAS, Washington, D.C., Civano, F, /Smithsonian Astrophys. Observ., Donato, D, /NASA, Goddard, Fuhrmann, L, /Bonn, Max Planck Inst., Radioastron., Funk, S, Healey, S E, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Hill, A B, /Joseph Fourier U., Knigge, C, /Southampton U., Madejski, G M, Romani, R W, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Santander-Garcia, M, /IAC, La Laguna /Isaac Newton Group /Laguna U., Tenerife, Shaw, M S, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Steeghs, D, /Warwick U., Torres, M A.P., /Smithsonian Astrophys. Observ., Van Etten, A, and /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /Texas U., Astron. Dept. Discovery of a GeV Blazar Shining Through the Galactic Plane. United States: N. p., 2011. Web.
Vandenbroucke, J, Buehler, R, Ajello, M, Bechtol, K, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Bellini, A, /Padua U., Astron. Dept. /Baltimore, Space Telescope Sci., Bolte, M, /UC, Santa Cruz, Cheung, C C, /Naval Research Lab, Wash., D.C. /NAS, Washington, D.C., Civano, F, /Smithsonian Astrophys. Observ., Donato, D, /NASA, Goddard, Fuhrmann, L, /Bonn, Max Planck Inst., Radioastron., Funk, S, Healey, S E, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Hill, A B, /Joseph Fourier U., Knigge, C, /Southampton U., Madejski, G M, Romani, R W, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Santander-Garcia, M, /IAC, La Laguna /Isaac Newton Group /Laguna U., Tenerife, Shaw, M S, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Steeghs, D, /Warwick U., Torres, M A.P., /Smithsonian Astrophys. Observ., Van Etten, A, & /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /Texas U., Astron. Dept. Discovery of a GeV Blazar Shining Through the Galactic Plane. United States.
Vandenbroucke, J, Buehler, R, Ajello, M, Bechtol, K, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Bellini, A, /Padua U., Astron. Dept. /Baltimore, Space Telescope Sci., Bolte, M, /UC, Santa Cruz, Cheung, C C, /Naval Research Lab, Wash., D.C. /NAS, Washington, D.C., Civano, F, /Smithsonian Astrophys. Observ., Donato, D, /NASA, Goddard, Fuhrmann, L, /Bonn, Max Planck Inst., Radioastron., Funk, S, Healey, S E, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Hill, A B, /Joseph Fourier U., Knigge, C, /Southampton U., Madejski, G M, Romani, R W, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Santander-Garcia, M, /IAC, La Laguna /Isaac Newton Group /Laguna U., Tenerife, Shaw, M S, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC, Steeghs, D, /Warwick U., Torres, M A.P., /Smithsonian Astrophys. Observ., Van Etten, A, and /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /Texas U., Astron. Dept. 2011. "Discovery of a GeV Blazar Shining Through the Galactic Plane". United States. https://www.osti.gov/servlets/purl/1023780.
@article{osti_1023780,
title = {Discovery of a GeV Blazar Shining Through the Galactic Plane},
author = {Vandenbroucke, J and Buehler, R and Ajello, M and Bechtol, K and /Stanford U., HEPL /KIPAC, Menlo Park /SLAC and Bellini, A and /Padua U., Astron. Dept. /Baltimore, Space Telescope Sci. and Bolte, M and /UC, Santa Cruz and Cheung, C C and /Naval Research Lab, Wash., D.C. /NAS, Washington, D.C. and Civano, F and /Smithsonian Astrophys. Observ. and Donato, D and /NASA, Goddard and Fuhrmann, L and /Bonn, Max Planck Inst., Radioastron. and Funk, S and Healey, S E and /Stanford U., HEPL /KIPAC, Menlo Park /SLAC and Hill, A B and /Joseph Fourier U. and Knigge, C and /Southampton U. and Madejski, G M and Romani, R W and /Stanford U., HEPL /KIPAC, Menlo Park /SLAC and Santander-Garcia, M and /IAC, La Laguna /Isaac Newton Group /Laguna U., Tenerife and Shaw, M S and /Stanford U., HEPL /KIPAC, Menlo Park /SLAC and Steeghs, D and /Warwick U. and Torres, M A.P. and /Smithsonian Astrophys. Observ. and Van Etten, A and /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /Texas U., Astron. Dept.},
abstractNote = {The Fermi Large Area Telescope (LAT) discovered a new gamma-ray source near the Galactic plane, Fermi J0109+6134, when it flared brightly in 2010 February. The low Galactic latitude (b = -1.2{sup o}) 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 Swift and the 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 obsorption, 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 {angstrom}, this blazar belongs in the flat-spectrum radio quasar category.},
doi = {},
url = {https://www.osti.gov/biblio/1023780}, journal = {Astrophys.J.718:L166-L170,2010},
number = ,
volume = 718,
place = {United States},
year = {Thu Aug 11 00:00:00 EDT 2011},
month = {Thu Aug 11 00:00:00 EDT 2011}
}