Change search
ReferencesLink to record
Permanent link

Direct link
The first gamma-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619
Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Number of Authors: 4
2015 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 452, no 1, 520-524 p.Article in journal (Refereed) Published
Abstract [en]

We report the discovery of gamma-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 gamma-ray source, detected over the first four years of Fermi operation, 0 degrees.23 from the radio position of the NLSy1. Analysing 76 months of gamma-ray data (2008 August 4-2014 December 31) we are able to better constrain the localization of the gamma-ray source. The new position of the gamma-ray source is 0 degrees.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 gamma-rays from FBQS J1644+2619 during 2012 July-October, and an increase of activity in the V band was detected by the Catalina Real-Time Sky Survey in the same period.

Place, publisher, year, edition, pages
2015. Vol. 452, no 1, 520-524 p.
Keyword [en]
galaxies: active, galaxies: individual: FBQS J1644+2619, galaxies: nuclei, galaxies: Seyfert, gamma-rays: general
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-121672DOI: 10.1093/mnras/stv1278ISI: 000360851100038OAI: oai:DiVA.org:su-121672DiVA: diva2:889957
Available from: 2015-12-29 Created: 2015-10-13 Last updated: 2015-12-29Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text
By organisation
The Oskar Klein Centre for Cosmo Particle Physics (OKC)
In the same journal
Monthly notices of the Royal Astronomical Society
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 20 hits
ReferencesLink to record
Permanent link

Direct link