3 February 2004 SWIFT XRT point spread function measured at the Panter end-to-end tests
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Abstract
The SWIFT X-ray Telescope (XRT) is designed to make astrometric, spectroscopic and photometric observations of the X-ray emission from Gamma-ray bursts and their afterglows, in the energy band 0.2 - 10 keV. Here we report the results of the analysis of SWIFT XRT Point Spread Function (PSF) as measured during the end-to-end calibration campaign at the Panter X-Ray beam line facility. The analysis comprises the study of the PSF both on-axis and off-axis. We compare the laboratory results with the expectations from the ray-tracing software and from the mirror module tested as a single unit. We show that the measured HEW meets the mission scientific requirements. On the basis of the calibration data we build an analytical model which is able to reproduce the PSF as a function of the energy and the position within the detector.
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Alberto Moretti, Sergio Campana, Gianpiero Tagliaferri, Anthony F. Abbey, Richard M. Ambrosi, Lorella Angelini, Andrew P. Beardmore, Heinrich W. Brauninger, Wolfgang Burkert, David N. Burrows, Milvia Capalbi, Guido Chincarini, Oberto Citterio, Giancarlo Cusumano, Michael J. Freyberg, Paolo Giommi, Gisela D. Hartner, Joanne E. Hill, Koji Mori, Dave C. Morris, Kallol Mukerjee, John A. Nousek, Julian P. Osborne, Alexander D. T. Short, Francesca Tamburelli, D. J. Watson, Alan A. Wells, "SWIFT XRT point spread function measured at the Panter end-to-end tests", Proc. SPIE 5165, X-Ray and Gamma-Ray Instrumentation for Astronomy XIII, (3 February 2004); doi: 10.1117/12.504857; https://doi.org/10.1117/12.504857
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