Ongoing episode of enhanced gamma-ray emission from the Crab Nebula detected by AGILE
ATel #12105; F. Lucarelli (SSDC and INAF/OAR), A. Ursi (INAF/IAPS), C. Pittori (SSDC and INAF/OAR), A. Bulgarelli, N. Parmiggiani (INAF/OAS-Bo), F. Verrecchia (SSDC and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), S. Vercellone (INAF/OA-Brera) G. Piano, M. Cardillo, G. Minervini (INAF/IAPS), V. Fioretti (INAF/OAS-Bo), M. Pilia (INAF/OA-Cagliari), I. Donnarumma (ASI), 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/OAS-Bo), A. Pellizzoni, 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), A. Ferrari (Univ. Torino and CIFS), F. Paoletti (East Windsor RSD Hightstown and INAF/IAPS), A. Antonelli (SSDC), P. Giommi, L. Salotti, G. Valentini, and F. D'Amico (ASI)
on 12 Oct 2018; 07:50 UT
Credential Certification: Andrea Bulgarelli (bulgarelli@iasfbo.inaf.it)
Subjects: Gamma Ray, >GeV
AGILE is monitoring the current episode of enhanced gamma-ray emission from the Crab Nebula as first reported by Fermi-LAT (ATel #12095).
Integrating from 2018-10-09 15:50 UT to 2018-10-11 15:50 UT, the AGILE/GRID detects a total (pulsar + Nebula) gamma-ray flux: F = (5.6 +/- 1.4) x 10^-6 ph cm^-2 s^-1 (E > 100 MeV) at 6.7 sigma. This flux level is consistent with the previously reported value in ATel #12095, and is a factor of ~2 greater than the average gamma-ray flux.
This measurement was obtained with AGILE observing a large portion of the sky in spinning mode.
Multifrequency observations of the Crab Nebula are strongly encouraged.
