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Proceedings Paper

In–flight calibration of the Swift XRT Point Spread Function
Author(s): Alberto Moretti; Sergio Campana; T. Mineo; Patrizia Romano; A. F. Abbey; L. Angelini; A. Beardmore; W. Burkert; D. N. Burrows; M. Capalbi; G. Chincarini; O. Citterio; G. Cusumano; M. J. Freyberg; P. Giommi; M. R. Goad; O. Godet; G. D. Hartner; J. E. Hill; J. Kennea; V. La Parola; V. Mangano; D. Morris; J. A. Nousek; J. Osborne; K. Page; C. Pagani; M. Perri; G. Tagliaferri; F. Tamburelli; A. Wells
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Paper 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. Swift was successfully launched on 2004 November 20. Here we report the results of the analysis of Swift XRT Point Spread Function (PSF) as measured in the first four months of the mission during the instrument calibration phase. The analysis includes the study of the PSF of different point-like sources both on-axis and off-axis with different spectral properties. We compare the in-flight data with the expectations from the on-ground calibration. On the basis of the calibration data we built an analytical model to reproduce the PSF as a function of the energy and the source position within the detector which can be applied in the PSF correction calculation for any extraction region geometry.

Paper Details

Date Published: 18 August 2005
PDF: 9 pages
Proc. SPIE 5898, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIV, 589818 (18 August 2005); doi: 10.1117/12.617164
Show Author Affiliations
Alberto Moretti, INAF--Osservatorio Astronomico di Brera (Italy)
Sergio Campana, INAF--Osservatorio Astronomico di Brera (Italy)
T. Mineo, INAF-IASF (Italy)
Patrizia Romano, INAF--Osservatorio Astronomico di Brera (Italy)
A. F. Abbey, Univ. of Leicester (United Kingdom)
L. Angelini, NASA-GSFC (United States)
A. Beardmore, Univ. of Leicester (United Kingdom)
W. Burkert, Max-Planck-Institut für extraterrestrische Physik (Germany)
D. N. Burrows, Pennsylvania State Univ. (United States)
M. Capalbi, ASI-ASDC (Italy)
G. Chincarini, INAF--Osservatorio Astronomico di Brera (Italy)
O. Citterio, INAF--Osservatorio Astronomico di Brera (Italy)
G. Cusumano, INAF-IASF (Italy)
M. J. Freyberg, Max-Plank-Insititut für extraterrestrische Physik (Germany)
P. Giommi, ASI-ASDC (Italy)
M. R. Goad, Univ. of Leicester (United Kingdom)
O. Godet, Univ. of Leicester (United Kingdom)
G. D. Hartner, Max-Planck-Institut für extraterrestrische Physik (Germany)
J. E. Hill, Pennsylvania State Univ. (United States)
J. Kennea, Pennsylvania State Univ. (United States)
V. La Parola, INAF-IASF (Italy)
V. Mangano, INAF-IASF (Italy)
D. Morris, Pennsylvania State Univ. (United States)
J. A. Nousek, Pennsylvania State Univ. (United States)
J. Osborne, Univ. of Leicester (United Kingdom)
K. Page, Univ. of Leicester (United Kingdom)
C. Pagani, Pennsylvania State Univ. (United States)
M. Perri, ASI-ASDC (Italy)
G. Tagliaferri, INAF--Osservatorio Astronomico di Brera (Italy)
F. Tamburelli, ASI-ASDC (Italy)
A. Wells, Univ. of Leicester (United Kingdom)

Published in SPIE Proceedings Vol. 5898:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIV
Oswald H. W. Siegmund, Editor(s)

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