Fermi LAT detection of a new gamma-ray source possibly associated with the flat spectrum radio source PMN J0332-6917
ATel #16693; S. Wagner (University of Wuerzburg), J. Valverde (UMBC/NASA GSFC), I. Mereu (INFN Perugia); on behalf of the Fermi Large Area Telescope Collaboration
on 6 Jul 2024; 13:48 UT
Credential Certification: Sarah Wagner (sarah.wagner@physik.uni-wuerzburg.de)
Subjects: Gamma Ray, >GeV, AGN, Blazar, Quasar, Transient
The Large Area Telescope (LAT), one of the two instruments on the Fermi Gamma-ray Space Telescope, has observed gamma-ray emission from a source positionally consistent with the flat spectrum radio source PMN J0332-6917, with coordinates R.A. = 53.8607 deg , Decl: = 69.2494 deg (J2000, Healey et al. 2007, ApJS, 171, 61, z=unknown). This source is not in any published LAT catalog.
Preliminary analysis indicates that this source was significantly detected (>5 sigma) on 2024 July 3, with a daily averaged gamma-ray flux (E>100MeV) of (4.7 +/- 1.5) x 10^-7 photons cm^-2 s^-1 (statistical uncertainty only). The corresponding single power law photon spectral index is 2.35 +/- 0.28.
Because Fermi operates in an all-sky scanning mode, regular gamma-ray monitoring of this source will continue. In consideration of the ongoing activity of this source we strongly encourage multiwavelength observations. For this source the Fermi LAT contact persons are Sarah Wagner (sarah.wagner@uni-wuerzburg.de) and Isabella Mereu (mereuisabella@gmail.com).
The Fermi LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.
