An optical flare of GB6 1310+4844 observed with the Kanata telescope

Following the Fermi/LAT detection of the gamma-ray flare from GB6 B1310+4844 (ATEL #2316), we performed optical photometric observation with the Kanata 1.5-m telescope at Higashi-Hiroshima Observatory. Our preliminary analysis shows that I and R-band magnitudes of GB6 B1310+4844 were R=20.1+/-0.3 and I=18.8+/-0.2 on 2009 Nov. 28.8(UT). We adopted a nearby star at RA=13:12:54.1 and DEC=+48:27:58.2 (R=16.019,I=15.657 in UCAC3) as the photometric reference.