Inorbit performance of the Hard X-ray Telescope (HXT) on board the Hitomi (ASTRO-H) satellite

Hironori Matsumoto, Hisamitsu Awaki, Manabu Ishida, Akihiro Furuzawa, Shigeo Yamauchi, Yoshitomo Maeda, Ikuyuki Mitsuishi, Yoshito Haba, Takayuki Hayashi, Ryo Iizuka, Kazunori Ishibashi, Masayuki Itoh, Hideyo Kunieda, Takuya Miyazawa, Hideyuki Mori, Takashi Okajima, Satoshi Sugita, Keisuke Tamura, Yuzuru Tawara

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Hitomi (ASTRO-H) carries two Hard X-ray Telescopes (HXTs), which can focus x-rays up to 80 keV. Combined with the hard x-ray imagers (HXIs) that detect the focused x-rays, imaging spectroscopy in the high-energy band from 5 to 80 keV is made possible. We studied characteristics of HXTs after the launch, such as the encircled energy function (EEF) and the effective area using the data of a Crab observation. The half power diameters (HPDs) in the 5- to 80-keV band evaluated from the EEFs are 1.59 arcmin for HXT-1 and 1.65 arcmin for HXT-2. Those are consistent with the HPDs measured with ground experiments when uncertainties are taken into account. We can conclude that there is no significant change in the characteristics of the HXTs before and after the launch. The off-axis angle of the aim point from the optical axis is evaluated to be <0.5 arcmin for both HXT-1 and HXT-2. The best-fit parameters for the Crab spectrum obtained with the HXT-HXI system are consistent with the canonical values.

Original languageEnglish
Article number011212
JournalJournal of Astronomical Telescopes, Instruments, and Systems
Volume4
Issue number1
DOIs
Publication statusPublished - 01-01-2018

Fingerprint

Telescopes
Satellites
telescopes
X rays
x rays
crabs
Image sensors
crab
Band structure
energy bands
energy
spectroscopy
Spectroscopy
Imaging techniques

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Control and Systems Engineering
  • Instrumentation
  • Astronomy and Astrophysics
  • Mechanical Engineering
  • Space and Planetary Science

Cite this

Matsumoto, Hironori ; Awaki, Hisamitsu ; Ishida, Manabu ; Furuzawa, Akihiro ; Yamauchi, Shigeo ; Maeda, Yoshitomo ; Mitsuishi, Ikuyuki ; Haba, Yoshito ; Hayashi, Takayuki ; Iizuka, Ryo ; Ishibashi, Kazunori ; Itoh, Masayuki ; Kunieda, Hideyo ; Miyazawa, Takuya ; Mori, Hideyuki ; Okajima, Takashi ; Sugita, Satoshi ; Tamura, Keisuke ; Tawara, Yuzuru. / Inorbit performance of the Hard X-ray Telescope (HXT) on board the Hitomi (ASTRO-H) satellite. In: Journal of Astronomical Telescopes, Instruments, and Systems. 2018 ; Vol. 4, No. 1.
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abstract = "Hitomi (ASTRO-H) carries two Hard X-ray Telescopes (HXTs), which can focus x-rays up to 80 keV. Combined with the hard x-ray imagers (HXIs) that detect the focused x-rays, imaging spectroscopy in the high-energy band from 5 to 80 keV is made possible. We studied characteristics of HXTs after the launch, such as the encircled energy function (EEF) and the effective area using the data of a Crab observation. The half power diameters (HPDs) in the 5- to 80-keV band evaluated from the EEFs are 1.59 arcmin for HXT-1 and 1.65 arcmin for HXT-2. Those are consistent with the HPDs measured with ground experiments when uncertainties are taken into account. We can conclude that there is no significant change in the characteristics of the HXTs before and after the launch. The off-axis angle of the aim point from the optical axis is evaluated to be <0.5 arcmin for both HXT-1 and HXT-2. The best-fit parameters for the Crab spectrum obtained with the HXT-HXI system are consistent with the canonical values.",
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Matsumoto, H, Awaki, H, Ishida, M, Furuzawa, A, Yamauchi, S, Maeda, Y, Mitsuishi, I, Haba, Y, Hayashi, T, Iizuka, R, Ishibashi, K, Itoh, M, Kunieda, H, Miyazawa, T, Mori, H, Okajima, T, Sugita, S, Tamura, K & Tawara, Y 2018, 'Inorbit performance of the Hard X-ray Telescope (HXT) on board the Hitomi (ASTRO-H) satellite', Journal of Astronomical Telescopes, Instruments, and Systems, vol. 4, no. 1, 011212. https://doi.org/10.1117/1.JATIS.4.1.011212

Inorbit performance of the Hard X-ray Telescope (HXT) on board the Hitomi (ASTRO-H) satellite. / Matsumoto, Hironori; Awaki, Hisamitsu; Ishida, Manabu; Furuzawa, Akihiro; Yamauchi, Shigeo; Maeda, Yoshitomo; Mitsuishi, Ikuyuki; Haba, Yoshito; Hayashi, Takayuki; Iizuka, Ryo; Ishibashi, Kazunori; Itoh, Masayuki; Kunieda, Hideyo; Miyazawa, Takuya; Mori, Hideyuki; Okajima, Takashi; Sugita, Satoshi; Tamura, Keisuke; Tawara, Yuzuru.

In: Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 4, No. 1, 011212, 01.01.2018.

Research output: Contribution to journalArticle

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T1 - Inorbit performance of the Hard X-ray Telescope (HXT) on board the Hitomi (ASTRO-H) satellite

AU - Matsumoto, Hironori

AU - Awaki, Hisamitsu

AU - Ishida, Manabu

AU - Furuzawa, Akihiro

AU - Yamauchi, Shigeo

AU - Maeda, Yoshitomo

AU - Mitsuishi, Ikuyuki

AU - Haba, Yoshito

AU - Hayashi, Takayuki

AU - Iizuka, Ryo

AU - Ishibashi, Kazunori

AU - Itoh, Masayuki

AU - Kunieda, Hideyo

AU - Miyazawa, Takuya

AU - Mori, Hideyuki

AU - Okajima, Takashi

AU - Sugita, Satoshi

AU - Tamura, Keisuke

AU - Tawara, Yuzuru

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Hitomi (ASTRO-H) carries two Hard X-ray Telescopes (HXTs), which can focus x-rays up to 80 keV. Combined with the hard x-ray imagers (HXIs) that detect the focused x-rays, imaging spectroscopy in the high-energy band from 5 to 80 keV is made possible. We studied characteristics of HXTs after the launch, such as the encircled energy function (EEF) and the effective area using the data of a Crab observation. The half power diameters (HPDs) in the 5- to 80-keV band evaluated from the EEFs are 1.59 arcmin for HXT-1 and 1.65 arcmin for HXT-2. Those are consistent with the HPDs measured with ground experiments when uncertainties are taken into account. We can conclude that there is no significant change in the characteristics of the HXTs before and after the launch. The off-axis angle of the aim point from the optical axis is evaluated to be <0.5 arcmin for both HXT-1 and HXT-2. The best-fit parameters for the Crab spectrum obtained with the HXT-HXI system are consistent with the canonical values.

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