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AGILE detection of gamma-ray emission from the FSRQ Ton 0599

ATel #11073; A. Bulgarelli, N. Parmiggiani (INAF/IASF-Bo), F. Lucarelli, F. Verrecchia, C. Pittori (SSDC and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), S. Vercellone (INAF/OA-Brera), S. Colafrancesco (INAF/OAR and Wits University), M. Cardillo, G. Piano, A. Ursi (INAF/IAPS), V. Fioretti, (INAF/IASF-Bo), M. Pilia (INAF/OA-Cagliari), I. Donnarumma (ASI), 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, 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 18 Dec 2017; 15:20 UT
Credential Certification: Andrea Bulgarelli (bulgarelli@iasfbo.inaf.it)

Subjects: Gamma Ray, Blazar

AGILE is detecting increasing gamma-ray emission above 100 MeV from a source positionally consistent with the FSRQ Ton 0599.

Integrating from 2017-12-16 05:45 to 2017-12-18 05:45 UT, a preliminary maximum likelihood analysis yields a detection above 5 sigma and a flux F(E>100 MeV)=(2.0 +/- 0.6) x 10^-6 ph cm^-2 s^-1.

Recent very-high energy gamma-ray activity of Ton 0599 was reported in ATel #11061 by MAGIC, and moreover it is reported to be in high-state from NIR to gamma-rays since October 2017 (ATel #10931, #10932, #10937, #10938, #10948, #10949).

This measurement was obtained with AGILE observing a large portion of the sky in spinning mode. Multifrequency observations of Ton 0599 are strongly encouraged.