Ultra-Fast Flash Observatory (UFFO) For Early Photon Measurements From Gamma Ray Bursts

Astronomy and Astrophysics – Astronomy

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Scientific paper

We describe the Ultra-Fast Flash Observatory (UFFO), which will observe early optical photons from gamma-ray bursts (GRBs) with a sub-second optical response, for the first time. The UFFO will probe the early optical rise of GRBs, opening a completely new frontier in GRB and transient studies, using a fast-response MEMS (Micro-Electro-Mechanical Systems) Mirror Array (MMA)-based optical system. In our small UFFO-Pathfinder experiment, scheduled to launch aboard the Lomonosov satellite in April 2012, we use a motorized mirror in our Slewing Mirror Telescope instrument to achieve less than one second optical response after X-ray trigger. We describe the science and the mission of the UFFO-Pathfinder project, as well as our plans of a full-scale UFFO-100 as the next step. With our program of ultra-fast optical response GRB observatories, we aim to gain a deeper understanding of GRB mechanisms, and potentially open up the z>10 universe to study via GRB as point source emission probes.

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