Fermi LAT detection of renewed GeV gamma-ray activity associated with the flat-spectrum radio source PKS 2247-131
ATel #9620; D. Gasparrini (ASDC & INFN PG) on behalf of the Fermi-LAT collaboration
on 13 Oct 2016; 20:17 UT
Credential Certification: Dario Gasparrini (dario.gasparrini@asdc.asi.it)
Subjects: Gamma Ray, >GeV, Request for Observations, AGN, Blazar
Referred to by ATel #: 11141
The Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope, has observed a renewed strong gamma-ray activity from a source positionally consistent with the flat-spectrum radio source PKS 2247-131 with coordinates RA=342.4983854 deg, Dec=-12.8546736 deg (J2000; Beasley et al. 2002, ApJS, 141, 13). Fermi-LAT already reported a flare on ATel #9285 but 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 2016 October 12 reaching a daily-average flux (E > 100 MeV) of (4.9+/-0.3) x10^-6 ph cm^-2 s^-1 (errors are statistical only) and corresponding averaged photon index of 2.1+/-0.1. This is the highest gamma-ray daily flux ever recorded for this source.
Fermi is currently executing a Target of Opportunity observation of the Crab, temporarily reducing the accumulation of exposure toward PKS 2247-131 (http://fermi.gsfc.nasa.gov/ssc/observations/timeline/too/). 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.
