不认识的GeV暂现源 AGL 2103+5650

 Fermi和Agile的报道有点儿冲突，前者给的上限比Agile的观测值还低。

Outside GCN IAUCs Other MacOS: Dashboard Widget Follow ATel on Twitter ATELstream ATel Community Site

Post a New Telegram | Search | Information Telegram Index Obtain Credential To Post | RSS Feeds | Email Settings Present Time: 23 Jul 2012; 03:39 UT

ATel News On March 22nd at 8:35 EST, we experienced a server outage for 70 minutes. We are investigating the cause of this outage. The recent two outages are not acceptable, and they will be addressed.

[ Previous | Next | ADS ] Fermi/LAT Observations of the Gamma-ray Transient AGL 2103+5650 ATel #3554; P. H.T. Tam (NTHU, Taiwan), H. F. Yu, E. M.H. Wu (HKU), A. K.H. Kong (NTHU, Taiwan) on 13 Aug 2011; 09:14 UT Credential Certification: Albert Kong (akong@phys.nthu.edu.tw) Subjects: Gamma Ray, >GeV, Transient We report on Fermi/LAT observations of the gamma-ray transient AGL 2103+5650 as reported by the AGILE collaboration (ATel #3544). Using the data obtained during the same time frame in which AGILE saw a 4.8 sigma detection (i.e., 2011-08-08 04:10 UT to 2011-08-10 09:04 UT), we carried out an unbinned likelihood analysis of a circular region of 10-degree radius around the position (R.A.=315.8 deg, Dec.=56.5 deg; J2000). All 2FGL catalog sources within 20 degrees from the above position are modeled, as well as the Galactic diffuse and the isotropic diffuse components. No significant gamma-ray emission above 100 MeV was detected in the LAT data. We place a 95% C.L. upper limit at ~9.8 x 10^-8 ph/cm^2/s between 100 MeV and 300 GeV, which is lower than the reported flux of (3.0+/-0.9) x 10^-6 ph/cm2/s (E > 100 MeV) in ATel #3544. Related 3554 Fermi/LAT Observations of the Gamma-ray Transient AGL 2103+5650 3544 AGILE detects enhanced gamma-ray emission from a new unidentified source AGL 2103+5630 [ Telegram Index ] R. E. Rutledge, Editor-in-Chief Derek Fox, Editor

 

Outside GCN IAUCs Other MacOS: Dashboard Widget Follow ATel on Twitter ATELstream ATel Community Site

Post a New Telegram | Search | Information Telegram Index Obtain Credential To Post | RSS Feeds | Email Settings Present Time: 23 Jul 2012; 03:39 UT

ATel News On March 22nd at 8:35 EST, we experienced a server outage for 70 minutes. We are investigating the cause of this outage. The recent two outages are not acceptable, and they will be addressed.

[ Previous | Next | ADS ] AGILE detects enhanced gamma-ray emission from a new unidentified source AGL 2103+5630 ATel #3544; A. Bulgarelli (INAF/IASF-Bo), C. Pittori, F. Verrecchia (ASDC), M. Tavani (INAF/IASF-Rm, and Univ. Tor Vergata), F. Gianotti, M. Trifoglio (INAF/IASF-Bo), A. Chen (INAF/IASF-Mi), F. Lucarelli (ASDC), E. Striani (Univ. Roma Tor Vergata), G. Piano (INAF/IASF-Rm), S. Vercellone (INAF/IASF-Pa), I. Donnarumma (INAF/IASF-Rm), A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), E. Del Monte, Y. Evangelista, M. Feroci, F. Lazzarotto, L. Pacciani, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda, A. Argan, G. Pucella, S. Sabatini, A. Trois, V. Vittorini (INAF/IASF-Rm), F. Fuschino, M. Galli, C. Labanti, M. Marisaldi, G. Di Cocco (INAF/IASF-Bo), A. Pellizzoni, M. Pilia (INAF/OA-Cagliari), G. Barbiellini, F. Longo, E. Vallazza (INFN Trieste), A. Morselli, P. Picozza, (INFN and Univ. Roma Tor Vergata), M. Cardillo (INAF/IASF-Rm and Univ. Tor Vergata), M. Prest (Universita` dell'Insubria), P. Lipari, D. Zanello (INFN and Univ. Roma Sapienza), P. W. Cattaneo, A. Rappoldi (INFN Pavia), P. Santolamazza, P. Giommi (ASDC), L. Salotti and G. Valentini (ASI) on 10 Aug 2011; 17:12 UT Credential Certification: Andrea Bulgarelli (bulgarelli@iasfbo.inaf.it) Subjects: Gamma Ray, >GeV, Transient Referred to by ATel #: 3554 AGILE is detecting intense gamma-ray emission above 100 MeV from a source at Galactic coordinates (l,b) = (95.15, 6.49) +/- 0.53 deg (95% stat.) +/- 0.1 deg (syst.) (R.A.,Dec.=315.8, 56.5 deg, J2000). Integrating from 2011-08-08 04:10 UT to 2011-08-10 09:04 UT, a maximum likelihood analysis yields a detection at a significance level of 4.8 sigma and a flux of (300+/-90) x 10E-8 ph/cm2/s (E > 100 MeV). Integrating from 2011-07-22 10:46 UT to 2011-08-08 07:25 UT we obtain only a 95% C.L. upper limit of 21 x 10E-8 ph/cm2/s (E > 100 MeV). No prominent extra-Galactic or Galactic gamma-ray sources are known within the AGL 2103+5630 error box. This measurement was obtained with AGILE observing a large portion of the sky in spinning mode. Multifrequency observations of the AGILE source error circle are strongly encouraged. Related 3554 Fermi/LAT Observations of the Gamma-ray Transient AGL 2103+5650 3544 AGILE detects enhanced gamma-ray emission from a new unidentified source AGL 2103+5630 [ Telegram Index ] R. E. Rutledge, Editor-in-Chief Derek Fox, Editor