First peek of ASTRO-H Soft X-ray Telescope (SXT) in-orbit performance

Takashi Okajima, Yang Soong, Peter Serlemitsos, Hideyuki Mori, Larry Olsen, David Robinson, Richard Koenecke, Bill Chang, Devin Hahne, Ryo Iizuka, Manabu Ishida, Yoshitomo Maeda, Toshiki Sato, Naomichi Kikuchi, Sho Kurashima, Nozomi Nakaniwa, Takayuki Hayashi, Kazunori Ishibashi, Takuya Miyazawa, Kenji TachibanaKeisuke Tamura, Akihiro Furuzawa, Yuzuru Tawara, Satoshi Sugita

研究成果: Conference contribution

24 引用 (Scopus)

抜粋

ASTRO-H (Hitomi) is a Japanese X-ray astrophysics satellite just launched in February, 2016, from Tanegashima, Japan by a JAXA's H-IIA launch vehicle. It has two Soft X-ray Telescopes (SXTs), among other instruments, that were developed by NASA's Goddard Space Flight Center in collaboration with ISAS/JAXA and Nagoya University. One is for an X-ray micro-calorimeter instrument (Soft X-ray Spectrometer, SXS) and the other for an X-ray CCD camera (Soft X-ray Imager, SXI), both covering the X-ray energy band up to 15 keV. The two SXTs were fully characterized at the 30-m X-ray beamline at ISAS/JAXA. The combined SXT+SXS system effective area is about 250 and 300 cm2 at 1 and 6 keV, respectively, although observations were performed with the gate valve at the dewar entrance closed, which blocks most of low energy X-rays and some of high energy ones. The angular resolution for SXS is 1.2 arcmin (Half Power Diameter, HPD). The combined SXT+SXI system effective area is about 370 and 350 cm2 at 1 and 6 keV, respectively. The angular resolution for SXI is 1.3 arcmin (HPD). The both SXTs have a field of view of about 16 arcmin (FWHM of their vignetting functions). The SXT+SXS field of view is limited to 3 × 3 arcmin by the SXS array size. In-flight data available to the SXT team was limited at the time of this conference and a point-like source data is not available for the SXT+SXS. Although due to lack of attitude information we were unable to reconstruct a point spread function of SXT+SXI, according to RXJ1856.5-3754 data, the SXT seems to be working as expected in terms of imaging capability. As for the overall effective area response for both SXT+SXS and SXT+SXI, consistent spectral model fitting parameters with the previous measurements were obtained for Crab and G21.5-0.9 data. On the other hand, their 2-10 keV fluxes differ by about 20% at this point. Calibration work is still under progress. The SXT is the latest version of the aluminum foil X-ray mirror, which is extremely light-weight and very low cost, yet produces large effective area over a wide energy-band. Its area-mass ratio is the largest, 16 cm2/kg, among ASTRO-H, Chandra, and XMM-Newton mirrors. The aluminum foil mirror is a still compelling technology depending on the mission science goal.

元の言語English
ホスト出版物のタイトルSpace Telescopes and Instrumentation 2016
ホスト出版物のサブタイトルUltraviolet to Gamma Ray
編集者Marshall Bautz, Tadayuki Takahashi, Jan-Willem A. den Herder
出版者SPIE
ISBN(電子版)9781510601895
DOI
出版物ステータスPublished - 01-01-2016
イベントSpace Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray - Edinburgh, United Kingdom
継続期間: 26-06-201601-07-2016

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
9905
ISSN(印刷物)0277-786X
ISSN(電子版)1996-756X

Other

OtherSpace Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
United Kingdom
Edinburgh
期間26-06-1601-07-16

    フィンガープリント

All Science Journal Classification (ASJC) codes

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

これを引用

Okajima, T., Soong, Y., Serlemitsos, P., Mori, H., Olsen, L., Robinson, D., Koenecke, R., Chang, B., Hahne, D., Iizuka, R., Ishida, M., Maeda, Y., Sato, T., Kikuchi, N., Kurashima, S., Nakaniwa, N., Hayashi, T., Ishibashi, K., Miyazawa, T., ... Sugita, S. (2016). First peek of ASTRO-H Soft X-ray Telescope (SXT) in-orbit performance. : M. Bautz, T. Takahashi, & J-W. A. den Herder (版), Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray [99050Z] (Proceedings of SPIE - The International Society for Optical Engineering; 巻数 9905). SPIE. https://doi.org/10.1117/12.2231705