The first γ-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619
Abstract
Here, we report the discovery of γ-ray emission from the narrow-line Seyfert 1 (NLSy1) galaxy FBQS J1644+2619 by the Large Area Telescope on board the Fermi satellite. The Third Fermi LAT Source catalogue reports an unidentified γ-ray source, detected over the first four years of Fermi operation, 0.°23 from the radio position of the NLSy1. Analysing 76 months of γ-ray data (2008 August 4–2014 December 31) we are able to better constrain the localization of the γ-ray source. The new position of the γ- ray source is 0.°05 from FBQS J1644+2619, suggesting a spatial association with the NLSy1. This is the sixth NLSy1 detected at high significance by Fermi-LAT so far. Notably, a significant increase of activity was observed in γ-rays from FBQS J1644+2619 during 2012 July–October, and an increase of activity in V -band was detected by the Catalina Real-Time Sky Survey in the same period.
- Authors:
-
- Univ. di Bologna (Italy). Dip. di Fisica e Astronomia; Istituto Nazionale di Astrofisica (INAF), Bologna (Italy). Istituto di Radioastronomia
- Istituto Nazionale di Astrofisica (INAF), Bologna (Italy). Istituto di Radioastronomia
- KTH Royal Inst. of Technology, Stockholm (Sweden). Oskar Klein Centre, Dept. of Physics
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE; National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); Swedish Research Council (SRC); Japan Aerospace Exploration Agency (JAXA)
- Contributing Org.:
- Fermi LAT Collaboration
- OSTI Identifier:
- 1354928
- Grant/Contract Number:
- AC02-76SF00515; NNG05GF22G; AST-0909182; AST- 1313422
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Volume: 452; Journal Issue: 1; Journal ID: ISSN 0035-8711
- Publisher:
- Royal Astronomical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; galaxies; gamma-rays; FBQS 1644+2619
Citation Formats
D'Ammando, F., Orienti, M., Larsson, J., and Giroletti, M. The first γ-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619. United States: N. p., 2015.
Web. doi:10.1093/mnras/stv1278.
D'Ammando, F., Orienti, M., Larsson, J., & Giroletti, M. The first γ-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619. United States. https://doi.org/10.1093/mnras/stv1278
D'Ammando, F., Orienti, M., Larsson, J., and Giroletti, M. Mon .
"The first γ-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619". United States. https://doi.org/10.1093/mnras/stv1278. https://www.osti.gov/servlets/purl/1354928.
@article{osti_1354928,
title = {The first γ-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619},
author = {D'Ammando, F. and Orienti, M. and Larsson, J. and Giroletti, M.},
abstractNote = {Here, we report the discovery of γ-ray emission from the narrow-line Seyfert 1 (NLSy1) galaxy FBQS J1644+2619 by the Large Area Telescope on board the Fermi satellite. The Third Fermi LAT Source catalogue reports an unidentified γ-ray source, detected over the first four years of Fermi operation, 0.°23 from the radio position of the NLSy1. Analysing 76 months of γ-ray data (2008 August 4–2014 December 31) we are able to better constrain the localization of the γ-ray source. The new position of the γ- ray source is 0.°05 from FBQS J1644+2619, suggesting a spatial association with the NLSy1. This is the sixth NLSy1 detected at high significance by Fermi-LAT so far. Notably, a significant increase of activity was observed in γ-rays from FBQS J1644+2619 during 2012 July–October, and an increase of activity in V -band was detected by the Catalina Real-Time Sky Survey in the same period.},
doi = {10.1093/mnras/stv1278},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 1,
volume = 452,
place = {United States},
year = {Mon Jul 06 00:00:00 EDT 2015},
month = {Mon Jul 06 00:00:00 EDT 2015}
}
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