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Enhanced gamma-ray emission from the Crab Nebula region detected by AGILE

ATel #4856; E. Striani, M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), F. Verrecchia, C. Pittori (ASDC and INAF/OAR), S. Vercellone (INAF/IASF-Pa), A. Bulgarelli, F. Gianotti, M. Trifoglio, V. Fioretti (INAF/IASF-Bo), M. Cardillo (INAF/IAPS and Univ. Roma Tor Vergata), F. Lucarelli (ASDC and INAF/OAR), G. Piano, I. Donnarumma, 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, V. Vittorini (INAF/IAPS), A. Chen, A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), F. Fuschino, M. Galli, C. Labanti, M. Marisaldi, G. Di Cocco (INAF/IASF-Bo), A. Pellizzoni, A. Trois (INAF/OA-Cagliari), M. Pilia (ASTRON, the Netherlands), G. Barbiellini, F. Longo, E. Vallazza (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 University of the Witwatersrand, Johannesburg), A. Antonelli (INAF/OAR and ASDC), P. Giommi (ASDC), L. Salotti, and G. Valentini (ASI)
on 4 Mar 2013; 22:15 UT
Credential Certification: Edoardo Striani (edoardo.striani@iasf-roma.inaf.it)

Subjects: Gamma Ray, Request for Observations, Neutron Star, Transient, Pulsar

Referred to by ATel #: 4867, 4869, 4878

Integrating from 2013-03-03 05:30 UT to 2013-03-04 11:00 UT, AGILE/GRID detects enhanced gamma-ray emission from a source positionally consistent with the Crab Nebula.

The total (pulsar + Nebula) gamma-ray flux is: F = (740 +/- 220) x 10^-8 ph cm^-2 s^-1 (E > 100 MeV) at 6 sigma statistical significance, in agreement with the Fermi LAT detection (ATel #4855).

AGILE is currently monitoring the Crab with telemetry gaps due to intermittent data acquisition at the ground station.

Multifrequency observations of the Crab are strongly encouraged.