RADIO VARIABILITY OF A FERMI LARGE AREA TELESCOPE BRIGHT SOURCE 0FGL J1847.8+3223
Rattachement africain : jp. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Radio variability was detected at 1.42 GHz from an area at the center of which a Fermi Large Area Telescope (LAT) bright source 0FGL J1847.8+3223 (B2 1846+32A) was located. The flux was detected using a two-element interferometer setup at the Waseda Nasu Observatory; the flux was at least 1200 mJy in 2004 and at least 1600 mJy in 2005. The flux of B2 1846+32A was 532 mJy in the 1980s, as observed by the Greenbank 300 telescope, and 516 mJy in the 1990s, as observed by the Very Large Array. Thus, the flux tripled from the mid-1990s to the mid-2000s in the 1.4 GHz band. In the 1980s and 1990s, a few observations of B2 1846+32A were carried out; however, variability in flux was not detected. In 2008, 8.800e-08 photon(100 MeV–1 GeV) cm −2 s −1 and 6.400e-09 photon(1 GeV–100 GeV) cm −2 s −1 gamma rays were detected from B2 1846+32A by the LAT. Gamma rays had not been detected from this source by EGRET in 1991–2000. The gamma-ray flux strengthened at least twice in about 10 years. The upper limit around this source by EGRET is approximately 4.9e-08 photon(>100 MeV) cm −2 s −1 . The flux of B2 1846+32A strengthened in the 2000s, as indicated by both radio and gamma-ray measurements. These results suggest that there exists a strong correlation between the radio radiation and the gamma-ray emission. In this Letter, we present the analytical results of a strong fringe in the area including B2 1846+32A.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- RADIO VARIABILITY OF A <i>FERMI</i> LARGE AREA TELESCOPE BRIGHT SOURCE 0FGL J1847.8+3223
- Date Crossref
- 01/04/2010
- Éditeur
- American Astronomical Society
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Waseda University Institute for Astrophysics pays non établi dans la noticeUniversité ou école supérieure
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National Institute of Information and Communications Technology pays non établi dans la noticeStructure de recherche
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National Astronomical Observatory of Japan pays non établi dans la noticeStructure de recherche
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Graduate School of Science and Engineering Department of Pure and Applied Physics pays non établi dans la noticeUniversité ou école supérieure
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School of Education Department of Science pays non établi dans la noticeUniversité ou école supérieure
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Kashima Space Research Center pays non établi dans la noticeStructure de recherche
Institute for Astrophysics — Waseda University, National Institute of Information and Communications Technology et National Astronomical Observatory of Japan, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.