Results of analysis of the detector response of the Pi of the Sky experiment

L. W. Piotrowski and A. F. Źarnecki
Faculty of Physics, University of Warsaw, Ho˙za 69, 00-681 Warsaw

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Abstract

The large coverage of the Pi of the Sky apparatus requires the use of cameras with very-wide angle lenses (20° X 20° field of view). However, such optics introduce significant deformations of the point spread function (PSF), increasing with the distance from the frame center. Deformed PSF introduces additional uncertainties in results of data analysis. In order to reduce these uncertainties, a model describing the PSF in our experiment has been developed. Laboratory measurements of the Pi of the Sky PSF, its parametrization and results of application to photometric and astrometric algorithms are shown in this paper, as well as a realistic simulator of the Pi of the Sky frame.

Results of analysis of the detector response of the Pi of the Sky experiment Measured PSFs 0, 800 and 1400 pixels from the frame center, along the diagonal
Fig. 1 Fig. 2 Fig. 3
Results of analysis of the detector response of the Pi of the Sky experiment
Fig. 4 Fig. 5 Fig. 6
Fig. 7 Fig. 8 Fig. 9


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Keywords : Gamma-ray Bursts (GRB) – point spread function (PSF) – wide-field camera.