OPTIMA-Burst: Observing GRB Afterglows and other Fast Transients with High Time Resolution

Details OPTIMA-Burst: Observing GRB Afterglows and other Fast Transients with High Time Resolution OPTIMA-Burst: Observing GRB Afterglows and other Fast Transients with High Time Resolution

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc..984..124s&link_type=abstract

HIGH TIME RESOLUTION ASTROPHYSICS: The Universe at Sub-Second Timescales. AIP Conference Proceedings, Volume 984, pp. 124-131 (

Astronomy and Astrophysics

Astrophysics

1

Gamma-Ray Sources, Gamma-Ray Bursts, Photometric, Polarimetric, And Spectroscopic Instrumentation, Plasma Reactions, Eclipses, Transits, And Occultations

Scientific paper

OPTIMA-Burst is a high time resolution optical photo/polarimeter specifically developed for the study of GRB Afterglows. It combines a high-speed single-photon counting photo/polarimeter with accurate (4 μs) and absolute (GPS) tagging of photon arrival-times, with a telescope with a quick automatic response to external Burst Triggers (GCN). Thus the instrument facilitates GRB afterglow photometry and polarimetry of early fast variability and flares. This allows unique insights into the physics of the ultra-relativistic jets assumed in GRBs and their Afterglows. OPTIMA-Burst was deployed for three months in 2006 on the 1.3 m Telescope of the Skinakas Observatory (Crete) proving the viability of the observation principle and of the instrument's implementation. Observations of polarized and highly variable sources (e.g. Crab Pulsar, CVs) allowed the determination of sensitivity. In 2007 a second long-duration campaign was performed, during which OPTIMA-Burst observed a peculiar transient source showing unusually strong flaring activity on very short timescales. OPTIMA-Burst's unique combination of quick response-time and high time resolution proved to be very valuable in the discovery of this source.

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