Fermi LAT Detection of a GeV Flare from FSRQ PKS 2320-035
ATel #5022; Bryce Carpenter (CUA) and Roopesh Ojha (NASA/GSFC/ORAU) on behalf of the Fermi Large Area Telescope Collaboration
on 27 Apr 2013; 15:34 UT
Credential Certification: Roopesh Ojha (Roopesh.Ojha@gmail.com)
Subjects: Gamma Ray, >GeV, AGN, Blazar, Quasar
Referred to by ATel #: 8323
The Large Area Telescope (LAT), one of the two instruments on the Fermi Gamma-ray Space Telescope, has observed increasing gamma-ray flux from a source positionally consistent with the flat spectrum radio quasar PKS 2320-035 (also known as 2FGL J2323.6-0316, Nolan et al. 2012, ApJS, 199, 31). PKS 2320-035 has coordinates RA=23h23m31.9537s DEC=-03d17m05.023s, J2000, (Johnston et al. 1995, AJ, 110, 880) and redshift z=1.41 (Browne et al. 1975, MNRAS, 173, 87).
Preliminary analysis indicates that on April 25, 2013 the daily averaged flux (E>100MeV) reached (1.0 +/- 0.3) x 10^-6 ph cm^-2 s^-1 (statistical uncertainty only) which is 18 times its average daily flux from the 2FGL catalog.
Because Fermi operates in an all-sky scanning mode, regular gamma-ray monitoring of this source will continue. This source is being added to the "LAT Monitored Sources" and consequently a preliminary estimation of the daily gamma-ray flux observed by Fermi LAT will be publicly available (http://fermi.gsfc.nasa.gov/ssc/data/access/lat/msl_lc/). We encourage further multifrequency observations of this source. For this source the Fermi LAT contact person is Bryce Carpenter (carpbr01@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.
