Development of MITSuME—Multicolor imaging telescopes for survey and monstrous explosions

A report of the observation system MITSuME for the physics of gamma-ray bursts (GRBs) and the early universe is presented. MITSuME   consists of three robotic telescopes, two optical telescopes and an IR telescope. Each optical telescope has a Tri-color Camera capable of perform g′g′, RcRc, IcIc bands photometry at the same time. The 91 cm IR telescope is now developing, this telescope is designed to have a wide field of view of 56′×56′56′×56′ and will perform YY, JJ, HH, KsKs photometry. These three telescopes are able to respond promptly to GRB alerts without human intervention. Using the MITSuME, we have already succeeded in detecting five GRBs and two of them were very distant GRBs.