MITSuME: multicolor optical/NIR telescopes for GRB afterglows.

Multicolor Imaging Telescopes for Survey and Monstrous Explosions (MITSuME) is built to perform multi-color photometry of NIR/optical afterglow covering the wavebands from Ks to g′ allowing the photometric redshift measurements up to z≈10. Two 50 cm optical telescopes are built at Akeno, Yamanashi in eastern Japan, and at OAO, Okayama in western Japan. Each telescope has a Tricolor Camera, which allows us to take simultaneous images in g′, Rc and Ic bands. These telescopes respond to GCN alerts and start taking series of tricolor images, which are immediately processed through the analys is pipeline on site. The pipeline consists of source finding, catalog matching, sky coordinates mapping to the image pixels, and photometry of the found sources. In addition, an automated search for an optical counterpart is performed. In addition, a wide-field (1°) 91 cm NIR telescope is being built at OAO with filters in Ks, H, J, and y bands. Summary of early results will be also presented. [ABSTRACT FROM AUTHOR]