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AGILE upper limits above 100 MeV regarding the recent transient MAXI J1659-152

ATel #2880; F. Lucarelli, F. Verrecchia (ASDC), A. Chen (INAF/IASF-Mi), M. Tavani (INAF/IASF-Rm, and Univ. Tor Vergata), C. Pittori (ASDC), A. Bulgarelli, F. Gianotti, M. Trifoglio (INAF/IASF-Bo), A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), I. Donnarumma (INAF/IASF-Rm), F. D'Ammando, S. Vercellone (INAF/IASF-Pa), E. Del Monte, Y. Evangelista, M. Feroci, F. Lazzarotto, L. Pacciani, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda, A. Argan, G. Piano, 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. Moretti, E. Vallazza (INFN Trieste), A. Morselli, P. Picozza, E. Striani (INFN and Univ. Roma 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, S. Colafrancesco, P. Giommi (ASDC), L. Salotti (ASI)
on 28 Sep 2010; 16:34 UT
Credential Certification: Fabrizio Lucarelli (fabrizio.lucarelli@asdc.asi.it)

Subjects: Gamma Ray, >GeV, Transient

Referred to by ATel #: 2881

Following the detection of the new hard X-ray transient by MAXI/GSC (ATel #2873) confirmed by INTEGRAL (ATel #2875) and in the radio band by WSRT (ATel #2874), we searched for significant excess in the AGILE data at the MAXI source position (R.A., Dec = +254.79 deg, -15.27 deg, J2000).

Integrating from 2010-09-25 00:00 UT to 2010-09-26 14:00 UT, a maximum likelihood analysis yields a 95 % C.L. upper limit of 80 e-8 ph/cm2/s (E > 100 MeV).

No significant detection is obtained for a longer 7-day integration, from 2010-09-20 00:00 UT to 2010-09-27 00:00 UT, yielding a 95 % C.L. upper limit of 40 e-8 ph/cm2/s (E > 100 MeV).

AGILE will continue to monitor the MAXI transient region. This measurement was obtained with AGILE observing a large portion of the sky in spinning mode.