AGILE detection of the gamma-ray source AGL J2114+6249

ATel #16012; L. Foffano (INAF/IAPS), G. Panebianco (INAF/OAS-Bo), F. Verrecchia (SSDC and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), C. Pittori (SSDC and INAF/OAR), A. Bulgarelli (INAF/OAS-Bo), G. Piano (INAF/IAPS), V. Fioretti, N. Parmiggiani, A. Addis, L. Baroncelli, A. Di Piano (Univ. Bologna - INAF/OAS-Bo), F. Lucarelli (SSDC and INAF/OAR), S. Vercellone (INAF/OA-Brera), M. Cardillo, A. Ursi, C. Casentini (INAF/IAPS), 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, I. Lapshov, E. Menegoni, L. Pacciani, P. Soffitta, V. Vittorini (INAF/IAPS), F. Lazzarotto (INAF/OAPD), G. Di Cocco, F. Fuschino, M. Galli, C. Labanti (INAF/OAS-Bo), M. Marisaldi (University of Bergen), A. Pellizzoni, M. Pilia, A. Trois (INAF/OA-Cagliari), G. Barbiellini (INFN Trieste), F. Longo (Univ. Trieste and INFN Trieste), E. Vallazza (INFN Milano Bicocca), 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), L. A. Antonelli (INAF/OAR), P. Giommi, L. Salotti, G. Valentini, and F. D'Amico (ASI)
on 26 Apr 2023; 15:24 UT
Credential Certification: Francesco Verrecchia (francesco.verrecchia@ssdc.asi.it)

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AGILE is currently detecting intense gamma-ray emission above 100 MeV from a gamma-ray source. Integrating from 2023-04-24 08:53:55 UT to 2023-04-26 08:53:55 UT, a preliminary maximum likelihood analysis shows a detection at 4.9 sigma, with a flux F = (2.6 +/- 1.0) x 10^-06 ph/cm^2/s (E>100 MeV).

The gamma-ray source positional error box is centered at Galactic coordinates (l,b) = (100.76, 9.75) deg, (J2000 R.A, Dec) = (318.39, 62.80) deg with a 95% confidence level error radius of 0.36 deg.

The nearest catalogued gamma-ray source is the 4FGL J2109.8+6315 (unassociated source in the 4FGL-DR3 Catalogue, Abdollahi, S., 2022, ApJS 260, 53) at about 40 arcmin, with a mean flux (E>100 MeV) about a factor of 1000 weaker.

The AGILE-GRID detection was obtained while AGILE is observing in spinning mode, surveying a large fraction of the sky each day. The source can be monitored with the public mobile application "AGILEScience" developed by the AGILE Team, available for both Android and iOS devices.

Multifrequency observations of the AGL J2114+6249 region are strongly encouraged.