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http://hdl.handle.net/20.500.12386/24171
Titolo: | The first γ-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619 | Autori: | D'AMMANDO, FILIPPO ORIENTI, Monica Larsson, J. GIROLETTI, MARCELLO |
Data pubblicazione: | 2015 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 452 | Fascicolo: | 1 | Da pagina:: | 520 | Abstract: | 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 the V band was detected by the Catalina Real-Time Sky Survey in the same period. | URI: | http://hdl.handle.net/20.500.12386/24171 | URL: | http://arxiv.org/abs/1503.08226v2 https://academic.oup.com/mnras/article/452/1/520/1749505 |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stv1278 | Bibcode ADS: | 2015MNRAS.452..520D | Fulltext: | open |
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