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Proceedings Paper

The calibration of the Solar-B x-ray optics
Author(s): Mario L. Cosmo; Edward E. DeLuca; Leon Golub; Gerald K. Austin; Jon H. Chappell; Marco Barbera; Jay A. Bookbinder; Peter N. Cheimets; Jonathan Cirtain; William A. Podgorski; William Davis; Salvatore Varisco; Mark A. Weber
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Paper Abstract

The Solar-B X-ray telescope (XRT) is a grazing-incidence modified Wolter I X-ray telescope, of 35 cm inner diameter and 2.7 m focal length. XRT, designed for full sun imaging over the wavelength 6-60 Angstroms, will be the highest resolution solar X-Ray telescope ever flown. Images will be recorded by a 2048 X 2048 back-illuminated CCD with 13.5 μm pixels (1 arc-sec/pixel ) with full sun field of view. XRT will have a wide temperature sensitivity in order to observe and discriminate both the high (5-10 MK) and low temperature (1-5 MK) phenomena in the coronal plasma. This paper presents preliminary results of the XRT mirror calibration performed at the X-ray Calibration Facility, NASA-MSFC, Huntsville, Alabama during January and February 2005. We discuss the methods and the most significant results of the XRT mirror performance, namely: characteristics of the point response function (PSF), the encircled energy and the effective area. The mirror FWHM is 0.8" when corrected for 1-g, finite source distance, and CCD pixelization. With the above corrections the encircled energy at 27 μm and 1keV is 52%. The effective area is greater than 2cm2 at 0.5keV and greater than 1.7cm2 at 1.0keV.

Paper Details

Date Published: 25 August 2005
PDF: 7 pages
Proc. SPIE 5900, Optics for EUV, X-Ray, and Gamma-Ray Astronomy II, 59000E (25 August 2005); doi: 10.1117/12.618822
Show Author Affiliations
Mario L. Cosmo, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Edward E. DeLuca, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Leon Golub, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Gerald K. Austin, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Jon H. Chappell, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Marco Barbera, Osservatorio Astronomico Giuseppe Vaiana (Italy)
Jay A. Bookbinder, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Peter N. Cheimets, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Jonathan Cirtain, Harvard-Smithsonian Ctr. for Astrophysics (United States)
William A. Podgorski, Harvard-Smithsonian Ctr. for Astrophysics (United States)
William Davis, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Salvatore Varisco, Osservatorio Astronomico Giuseppe Vaiana (Italy)
Mark A. Weber, Harvard-Smithsonian Ctr. for Astrophysics (United States)


Published in SPIE Proceedings Vol. 5900:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy II
Oberto Citterio; Stephen L. O'Dell, Editor(s)

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