REM, Rapid Eye Mount
Group members: Emilio Molinari, Enrico Mattaini, Emilio Sant'Ambrogio
REM (Rapid Eye Mount) is a 60 cm diameter fast reacting telescope located in the La Silla premises of the ESO Chilean Observatory (29°15′S and 70°44′W).
The telescope hosts two instruments: REMIR, an infrared imaging camera, and ROS2, a visible imager with 4 parallel channels. The two cameras can observe simultaneously thanks to a dichroic placed before telescope focus the same field of view of 10x10 arcmin.
Its relatively small size is in fact balanced by an accurate 10 deg/sec fast pointing. This velocity makes REM suitable for immediate response to random alerts. Being build and continuously working for GRB prompt follow-ups, REM is regularly offered to the community who can submit proposal every 6 months. The telescope hosts two instruments: REMIR, an infrared imaging camera, and ROS2, a visible imager. The two cameras can observe simultaneously thanks to a dichroic placed before telescope focus the same field of view of 10x10 arcmin. In the infrared range from 1 to 2.3 micron REMIR can use a [z', J, H, K'] filter set and frames can reach H=15 in 5 sec exposure. ROS2 is equipped with a Sloan filter set [g, r, i, z] and produces the 4 channels simultaneously and will be fully operational from 2013.
The observing procedure is completely robotic and the nightly schedule is optimized for the observation of scheduled targets but it is immediately overdriven in case of GRB (or other) alerts. Typically REM can observe the new target after 30 seconds from notification.
REM has been installed in its place during June 2003 and has been gathering data on GRB and other sources since then. Also it can be considered a bench for experimental instrumentation and equipment. Different solution for the cryogeny in the IR camera, a number of IT architectures and a fast (quasi TV) intensified camera (Tortora) filled the technical schedule of the past years. The Observatory is operated for INAF by the REM Team, a delocalized group of people.