Fermi LAT detection of a new Gamma-ray Source PKS B1251-713
ATel #8215; S. Buson (NASA-GSFC/CRESST/UMBC) on behalf of the Fermi LAT collaboration
on 26 Oct 2015; 03:15 UT
Credential Certification: Sara Buson (sara.buson@nasa.gov)
Subjects: Gamma Ray, Request for Observations, AGN, Blazar, Transient
The Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope, has observed strong gamma-ray emission from a source positionally consistent with the radio source PKS B1251-713 with coordinates RA=193.7496721 deg, Dec=-71.6384544 deg (J2000; Johnston et al. 1995, AJ, 110, 880). This source is not in any published LAT catalog and was not detected by AGILE or EGRET.
Preliminary analysis indicates that the source brightened in gamma rays on 2015 October 23 with a daily averaged flux (E > 100 MeV) of (1.1+/-0.2) x10^-7 ph cm^-2 s^-1 (errors are statistical only). The source had a photon index of (1.4+/-0.1).
Because Fermi operates in an all-sky scanning mode, regular gamma-ray monitoring of this source will continue. In consideration of the activity of this source we encourage multiwavelength observations. For this source the Fermi LAT contact person is S. Buson (sara.buson@nasa.gov).
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.
