AGILE detection of a prolonged enhanced gamma-ray emission from the blazar 4C +38.41
ATel #12026; M. Cardillo, G. Piano (INAF/IAPS), F. Verrecchia, C. Pittori (SSDC and INAF/OAR), S. Vercellone (INAF/OA-Brera), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), I. Donnarumma (ASI), F. Lucarelli (SSDC and INAF/OAR), A. Ursi, G. Minervini (INAF/IAPS), A. Bulgarelli, V. Fioretti, N. Parmiggiani (INAF/OAS-Bo), P. Munar-Adrover (UAB), E. Striani (CIFS and INAF/IAPS), F. Gianotti, M. Trifoglio (INAF/OAS-Bo), A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), A. Chen (Wits University), A. Argan, E. Costa, E. Del Monte, Y. Evangelista, M. Feroci, F. Lazzarotto, I. Lapshov, L. Pacciani, P. Soffitta, S. Sabatini, V. Vittorini (INAF/IAPS), G. Pucella, M. Rapisarda (ENEA-Frascati), G. Di Cocco, F. Fuschino, M. Galli, C. Labanti, M. Marisaldi (INAF/IASF-Bo), A. Pellizzoni, M. Pilia, A. Trois (INAF/OA-Cagliari), G. Barbiellini, E. Vallazza (INFN Trieste), F. Longo (Univ. Trieste and INFN Trieste), A. Morselli, P. Picozza (INFN and Univ. Roma Tor Vergata), M. Prest (Univ. dell'Insubria), P. Lipari, D. Zanello (INFN and Univ. Roma Sapienza), P. W. Cattaneo, A. Rappoldi (INFN Pavia), S. Colafrancesco (INAF/OAR and Wits University), A. Ferrari (Univ. Torino and CIFS), F. Paoletti (East Windsor RSD Hightstown and INAF/IAPS), A. Antonelli (INAF/OAR), P. Giommi, L. Salotti, G. Valentini, and F. D'Amico (ASI)
on 10 Sep 2018; 15:35 UT
Credential Certification: MARTINA CARDILLO (martina.cardillo@iaps.inaf.it)
Subjects: Gamma Ray, Blazar
AGILE is detecting enhanced gamma-ray activity above 100 MeV from the blazar 4C +38.41 (FSRQ 1633+38), which follows the gamma-ray outburst reported by AGILE (see ATel #12005). Integrating from 2018-09-08 UT 12:58:43 to 2018-09-10 UT 12:58:43, a preliminary multi-source likelihood analysis detects a gamma-ray flux F(>100 MeV) = (3.3 +/- 0.9) x 10^-6 photons/cm^2/s at a significance level of about 5.5 sigma. We notice that this gamma-ray activity is occurring following the optical outburst reported by the WEBT/GASP (see ATEL #12025).
The AGILE-GRID detection was obtained while AGILE is observing in spinning mode, surveying a large fraction of the sky each day. The source can be monitored with the public mobile application "AGILEScience" developed by the AGILE Team, available for both Android and iOS devices.
Multifrequency observations of 4C +38.41 are strongly encouraged.
