|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Identification of gamma-ray emission from 3C345 and NRAO512 | | F.K. Schinzel
; K.V. Sokolovsky
; F. D'Ammando
; T.H. Burnett
; W. Max-Moerbeck
; C.C. Cheung
; S.J. Fegan
; J.M. Casandjian
; L.C. Reyes
; M. Villata
; C.M. Raiteri
; I. Agudo
; O.J.A. Bravo Calle
; D. Carosati
; R. Casas
; J.L. Gomez
; M.A. Gurwell
; H.Y. Hsiao
; S.G. Jorstad
; G. Kimeridze
; T.S. Konstantinova
; E.N. Kopatskaya
; E. Koptelova
; O.M. Kurtanidze
; S.O. Kurtanidze
; V.M. Larionov
; E.G. Larionova
; L.V. Larionova
; A.P. Marscher
; D.A. Morozova
; M.G. Nikolashvili
; M. Roca-Sogorb
; J.A. Ros
; L.A. Sigua
; O. Spiridonova
; I.S. Troitsky
; V.V. Vlasyuk
; A.P. Lobanov
; J.A. Zensus
; | | Date: |
14 Jul 2011 | | Abstract: | For more than 15 years, since the days of the Energetic Gamma-Ray Experiment
Telescope (EGRET) on board the Compton Gamma-Ray Observatory (CGRO; 1991-2000),
it has remained an open question why the prominent blazar 3C 345 was not
reliably detected at gamma-ray energies <=20 MeV. Recently a bright gamma-ray
source (0FGL J1641.4+3939/1FGL J1642.5+3947), potentially associated with 3C
345, was detected by the Large Area Telescope (LAT) on Fermi. Multiwavelength
observations from radio bands to X-rays (mainly GASP-WEBT and Swift) of
possible counterparts (3C 345, NRAO 512, B3 1640+396) were combined with 20
months of Fermi-LAT monitoring data (August 2008 - April 2010) to associate and
identify the dominating gamma-ray emitting counterpart of 1FGL J1642.5+3947.
The source 3C 345 is identified as the main contributor for this gamma-ray
emitting region. However, after November 2009 (15 months), a significant excess
of photons from the nearby quasar NRAO 512 started to contribute and thereafter
was detected with increasing gamma-ray activity, possibly adding flux to 1FGL
J1642.5+3947. For the same time period and during the summer of 2010, an
increase of radio, optical and X-ray activity of NRAO 512 was observed. No
gamma-ray emission from B3 1640+396 was detected. | | Source: | arXiv, 1107.2926 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER