Current status of the X-ray mirror for the XL-calibur experiment

K. Hattori, H. Matsumoto, Q. Abarr, H. Awaki, M. G. Baring, R. Bose, D. Braun, G. de Geronimo, P. Dowkontt, J. Elliot, T. Enoto, M. Errando, Y. Fukazawa, A. Furuzawa, T. Gadson, E. Gau, V. Guarino, S. Gunji, K. Hall, K. HarmonK. Hayashida, S. Heatwole, A. Hossen, F. Imazato, K. Ishibashi, M. Ishida, N. K. Iyer, F. Kislat, M. Kiss, T. Kitaguchi, D. Kotsifakis, H. Krawczynski, J. Lanzi, L. Lisalda, Y. Maeda, H. Matake, T. Mineta, T. Miyazawa, T. Mizuno, N. Nakaniwa, T. Okajima, I. Pastrani, M. Pearce, Z. Peterson, C. Purdy, B. Rauch, F. Ryde, Y. Saito, C. Shreeves, G. Simburger, C. Snow, S. Spooner, T. A. Stana, D. Stuchlik, H. Takahashi, T. Takeda, M. Takeo, T. Tamagawa, K. Tamura, H. Tsunemi, N. Uchida, Y. Uchida, K. Uchiyama, B. Vincent, A. T. West, E. A. Wulf, R. Yamamoto, Y. Yoshida

Research output: Chapter in Book/Report/Conference proceedingConference contribution


XL-Calibur is a balloon-borne hard X-ray polarimetry mission, the first flight of which is currently foreseen for 2022. XL-Calibur carries an X-ray telescope consists of 213 Wolter I grazing-incidence mirrors which are nested in a coaxial and cofocal configuration. The optics design is nearly identical to the Hard X-ray Telescope (HXT) on board the ASTRO-H satellite. The telescope was originally fabricated for the Formation Flying Astronomical Survey Telescope (FFAST) project. However, the telescope can be used for XL-Calibur, since the FFAST project was terminated before completion. The mirror surfaces are coated with Pt/C depth-graded multilayers to reflect hard X-rays above 10 keV by Bragg reflection. The effective area of the telescope is larger than 300 cm2 at 20 keV. This paper reports the current status of the telescope for XL-Calibur.

Original languageEnglish
Title of host publicationSpace Telescopes and Instrumentation 2020
Subtitle of host publicationUltraviolet to Gamma Ray
EditorsJan-Willem A. den Herder, Shouleh Nikzad, Kazuhiro Nakazawa
ISBN (Electronic)9781510636750
Publication statusPublished - 2020
EventSpace Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray - Virtual, Online, United States
Duration: 14-12-202018-12-2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceSpace Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray
Country/TerritoryUnited States
CityVirtual, Online

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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