AGILE detection of the gamma-ray source AGL J1626-3528
ATel #15979; C. Pittori (SSDC and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), F. Verrecchia (SSDC and INAF/OAR), A. Bulgarelli (INAF/OAS-Bo), A. Di Piano (Univ. Modena - INAF/OAS-Bo), G. Panebianco (Univ. Bologna - INAF/OAS-Bo), G. Piano (INAF/IAPS), V. Fioretti, N. Parmiggiani, L. Baroncelli, (INAF/OAS-Bo), F. Lucarelli (SSDC and INAF/OAR), S. Vercellone (INAF/OA-Brera), M. Cardillo, C. Casentini (INAF/IAPS), A. Ursi, E. Menegoni, 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, L. Foffano, I. Lapshov, 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), L. A. Antonelli (INAF/OAR), P. Giommi, L. Salotti, G. Valentini, and F. D'Amico (ASI)
on 6 Apr 2023; 21:53 UT
Credential Certification: Carlotta Pittori (carlotta.pittori@asdc.asi.it)
Subjects: Gamma Ray, >GeV
Referred to by ATel #: 15985
AGILE is currently detecting intense gamma-ray emission above 100 MeV from a new gamma-ray source. Integrating from 2023-04-04 04:00 UT to 2023-04-06 04:00 UT, a preliminary maximum likelihood analysis shows a detection at a significance level of 4.7 sigma, with a flux F = (3.5 +/- 1.2) E-06 ph/cm2/s (E>100 MeV).
The gamma-ray source positional error box is centered at Galactic coordinates (l,b) = (345.2, 9.7) deg, (J2000 R.A, Dec) = (246.8,-34.9) deg, and has a preliminary 95% confidence radius of 0.6 degrees.
The nearest catalogued gamma-ray source is the 4FGL J1628.3-3343 (bcu classification in the 4FGL Catalogue) at about 71 arcmin, with a mean flux (E>100 MeV) a factor of 100 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 J1626-3528 region are strongly encouraged.
