Improved REM telescope interface with a new simultaneous multiband visible camera

摘要: A new mechanical interface between the telescope Nasmyth derotator and focal plane instrumentation has been developed built for robotic REM in La Silla. light-weighted flange will substitute existing one in order to improve performances term of flexures. ghost-free, high performances, dichroic been designed installed inside flange, improving efficiency wavelength splitting between the visible near-infrared channels. The camera been completely redesigned order get simultaneous multi-band coverage within 10'x10' field view. Four bands be observed onto same 2kx2k, 13.5 micron pixel, detector. Band is obtained with plate dichroics, working at 45 deg incidence angle. It allow fast observe gamma-ray burst afterglow from 400 nm up 2.5 micron, better characterize spectral features these fastly evolving sources.