TITLE: GCN CIRCULAR NUMBER: 13427 SUBJECT: GRB 120709A: Matched filter analysis of Fermi-LAT data DATE: 12/07/10 20:51:49 GMT FROM: Weikang Zheng at U.of Michigan Weikang Zheng and Carl Akerlof, report on behalf of the ROTSE collaboration: We analyzed Fermi/LAT data of GRB 120709A (Kocevski et al., GCN 13423) as a follow-up of routine search in GBM trigger catalogs in our LAT data processing pipeline using the matched filter technique (Akerlof et al. 2010, ApJ, 725, L15; 2011 ApJ, 726, 22; 2012, arXiv:1205.3066; Zheng et al. 2012, ApJ 745,72; 2012, arXiv:1203.5113). We use a standard data selection method (with Energy range of 100 MeV < E < 300 GeV). About 10 photons associated with GRB are detected above 100 MeV in 47.5s duration, with the highest energy of ~3.07 GeV at 2.04s after the burst. The GRB location estimated by the matched filter technique is RA = 320.23, Dec = -51.13 with uncertainty ~0.5 degree, consistent with the location given in GCN 13423. The photon information can be found in the following link including the skymap: http://www.rotse.net/LAT/GBMTriggers/363561103/