Calibration of the Solar-B x-ray optics

Marco Barbera, Leon Golub, Mark A. Weber, Leon Golub, Jonathan Cirtain, Salvatore Varisco, Mario L. Cosmo, Peter N. Cheimets, William A. Podgorski, Edward E. Deluca, Jay A. Bookbinder, Marco Barbera, Gerald K. Austin, Jon H. Chappell, William Davis

Research output: Contribution to conferenceOtherpeer-review

1 Citation (Scopus)


The Solar-B X-ray telescope (XRT) is a grazing-incidence modified Wolter I X-ray telescope, of 35 cm inner diameterand 2.7 m focal length. XRT, designed for full sun imaging over the wavelength 6-60 Angstroms, will be the highestresolution solar X-Ray telescope ever flown. Images will be recorded by a 2048 X 2048 back-illuminated CCD with13.5 µm pixels (1 arc-sec/pixel ) with full sun field of view. XRT will have a wide temperature sensitivity in order toobserve 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 mostsignificant results of the XRT mirror performance, namely: characteristics of the point response function (PSF), theencircled energy and the effective area. The mirror FWHM is 0.8” when corrected for 1-g, finite source distance, andCCD pixelization. With the above corrections the encircled energy at 27m and 1keV is 52%. The effective area isgreater than 2cm2 at 0.5keV and greater than 1.7cm2 at 1.0keV
Original languageEnglish
Number of pages7
Publication statusPublished - 2005

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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