REM observations of the blazar OJ 287 in NIR

The Large Area Telescope onboard the Fermi satellite detected a gamma-ray flare from the blazar OJ 287 on 2011 October 10 (ATel #3680). The robotic 60-cm REM telescope located at La Silla (Chile), following a periodical monitoring program, observed automatically the field of the blazar OJ 287 starting from November 2009. Recently, infrared observations were performed in the J and H bands using REMIR on 2011 October 1, 6, 7, 9, and 11.