We present the results of the prompt, early and afterglow optical observations of five {gamma}-ray bursts (GRBs): GRB 100901A, GRB 100902A, GRB 100905A, GRB 100906A and GRB 101020A. These observations were made with the Mobile Astronomical System of TElescope-Robots in Russia (MASTER-II Net), the 1.5-m telescope of the Sierra Nevada Observatory and the 2.56-m Nordic Optical Telescope.
Cone search capability for table J/MNRAS/421/1874/table8 (Standard stars for GRB100901A)
Cone search capability for table J/MNRAS/421/1874/table9 (Standard stars for GRB100906A)