AGILE detection of enhanced gamma-ray activity from the S5 0836+71 (4C +71.07) region

ATel #8223; A. Bulgarelli (INAF/IASF-Bo), F. Lucarelli, F. Verrecchia, C. Pittori (ASDC and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), I. Donnarumma (INAF/IAPS), S. Vercellone (INAF/IASF-Pa), V. Fioretti (INAF/IASF-Bo), G. Piano (INAF/IAPS), E. Striani (CIFS and INAF/IAPS), M. Cardillo (INAF/OA-Arcetri and INAF/IAPS), F. Gianotti, M. Trifoglio (INAF/IASF-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), N. Parmiggiani (University of Modena and Reggio Emilia), A. Ferrari (Univ. Torino and CIFS), A. Antonelli (ASDC and INAF/OAR), P. Giommi (ASDC), L. Salotti, G. Valentini, and F. D'Amico (ASI)
on 29 Oct 2015; 13:09 UT
Credential Certification: Andrea Bulgarelli (bulgarelli@iasfbo.inaf.it)

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AGILE is detecting intense gamma-ray emission above 100 MeV from a source in Galactic coordinates (l,b)=(143.06, 34.22) deg (R.A., Dec.= 130.099 71.33 deg, J2000), with a statistical 95% c.l. elliptical error region with major and minor axes of 0.87 deg and 0.48 deg, respectively, plus a systematical uncertainty of 0.1 deg. The roll angle of major axis from the north direction is -35.0 deg counterclockwise. This position is consistent with that of the high-redshift (z=2.218) Quasar 0836+71 (also known as 4C 71.07, see Jorstad et al. European Physical Journal Web of Conferences, 2013; Akyuz et al. 2013, A&A 556, 71, or 5BZQJ0841+7053).

Integrating from 2015-10-27 04:34 UT to 2015-10-29 04:34 UT, a maximum likelihood analysis yields the detection of the source with a flux of (2.4 +/- 0.8) x 10E-6 ph/cm2/s (E > 100 MeV) at a significance above 5 sigma.

The gamma-ray flaring activity from this FSRQ was previously announced by Fermi (Atel #7870, ATel #3260 and ATel #3831).

This measurement was obtained with AGILE observing a large portion of the sky in spinning mode.

Multifrequency observations of sources in the AGILE error ellipse are strongly encouraged.