Pi of the Sky:. modelling of the detector response for more effective search for optical GRB counterparts

Details Pi of the Sky:. modelling of the detector response for more effective search for optical GRB counterparts Pi of the Sky:. modelling of the detector response for more effective search for optical GRB counterparts

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apsp.conf..313p&link_type=abstract

ASTROPARTICLE, PARTICLE AND SPACE PHYSICS, DETECTORS AND MEDICAL PHYSICS APPLICATIONS. Proceedings of the 11th Conference. Held

Physics

Medical Physics

Scientific paper

The ultimate goal of the "Pi of the Sky" apparatus is observation of optical flashes of astronomical origin and other light sources variable on short timescales, down to tens of seconds. We search mainly for optical emissions of Gamma Ray Bursts, but also variable stars, novae, blazars, etc. This task requires a precise photometry - accurate measurement of the source's brightness (and it's variability). "Pi of the Sky" single cameras' field of view is about 20° × 20°. This causes a significant deformation of a point spread function (PSF), reducing quality of brightness measurement with standard photometric algorithms. To improve photometry, we decided to perform laboratory PSF measurements, using a CCD camera and an artificial light source as a star simulator. This work shows preliminary results of this study - a set of high resolution PSF shapes, pixel response and pixel sensitivity functions. Finally, an idea how to simulate a real star image in the "Pi of the Sky" parametrize is presented.

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