In-orbit performance of the soft X-ray imaging system aboard Hitomi (ASTRO-H)

Hiroshi Nakajima, Yoshitomo Maeda, Hiroyuki Uchida, Takaaki Tanaka, Hiroshi Tsunemi, Kiyoshi Hayashida, Takeshi G. Tsuru, Tadayasu Dotani, Ryo Nagino, Shota Inoue, Masanobu Ozaki, Hiroshi Tomida, Chikara Natsukari, Shutaro Ueda, Koji Mori, Makoto Yamauchi, Isamu Hatsukade, Yusuke Nishioka, Miho Sakata, Tatsuhiko BeppuDaigo Honda, Masayoshi Nobukawa, Junko S. Hiraga, Takayoshi Kohmura, Hiroshi Murakami, Kumiko K. Nobukawa, Aya Bamba, John P. Doty, Ryo Iizuka, Toshiki Sato, Sho Kurashima, Nozomi Nakaniwa, Ryota Asai, Manadu Ishida, Hideyuki Mori, Yang Soong, Takashi Okajima, Peter Serlemitsos, Yuzuru Tawara, Ikuyuki Mitsuishi, Kazunori Ishibashi, Keisuke Tamura, Takayuki Hayashi, Akihiro Furuzawa, Satoshi Sugita, Takuya Miyazawa, Hisamitsu Awaki, Eric D. Miller, Hiroya Yamaguchi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We describe the in-orbit performance of the soft X-ray imaging system consisting of the Soft X-ray Telescope and the Soft X-ray Imager aboard Hitomi. Verification and calibration of imaging and spectroscopic performance are carried out, making the best use of the limited data of less than three weeks. Basic performance, including a large field of view of 38 × 38, is verified with the first-light image of the Perseus cluster of galaxies. Amongst the small number of observed targets, the on-minus-off pulse image for the out-of-time events of the Crab pulsar enables us to measure the half-power diameter of the telescope as ∼1.3. The average energy resolution measured with the onboard calibration source events at 5.89 keV is 179 ± 3 eV in full width at half maximum. Light leak and crosstalk issues affected the effective exposure time and the effective area, respectively, because all the observations were performed before optimizing an observation schedule and the parameters for the dark-level calculation. Screening the data affected by these two issues, we measure the background level to be 5.6 × 10−6 counts s−1 arcmin−2 cm−2 in the energy band of 5–12 keV, which is seven times lower than that of the Suzaku XIS-BI.

Original languageEnglish
Article numberpsx116
JournalPublications of the Astronomical Society of Japan
Volume70
Issue number2
DOIs
Publication statusPublished - 01-03-2018

Fingerprint

orbits
telescopes
calibration
crabs
x rays
background level
schedules
field of view
crosstalk
pulsars
energy bands
energy
crab
screening
galaxies
pulses
parameter
calculation
exposure

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Nakajima, H., Maeda, Y., Uchida, H., Tanaka, T., Tsunemi, H., Hayashida, K., ... Yamaguchi, H. (2018). In-orbit performance of the soft X-ray imaging system aboard Hitomi (ASTRO-H). Publications of the Astronomical Society of Japan, 70(2), [psx116]. https://doi.org/10.1093/pasj/psx116
Nakajima, Hiroshi ; Maeda, Yoshitomo ; Uchida, Hiroyuki ; Tanaka, Takaaki ; Tsunemi, Hiroshi ; Hayashida, Kiyoshi ; Tsuru, Takeshi G. ; Dotani, Tadayasu ; Nagino, Ryo ; Inoue, Shota ; Ozaki, Masanobu ; Tomida, Hiroshi ; Natsukari, Chikara ; Ueda, Shutaro ; Mori, Koji ; Yamauchi, Makoto ; Hatsukade, Isamu ; Nishioka, Yusuke ; Sakata, Miho ; Beppu, Tatsuhiko ; Honda, Daigo ; Nobukawa, Masayoshi ; Hiraga, Junko S. ; Kohmura, Takayoshi ; Murakami, Hiroshi ; Nobukawa, Kumiko K. ; Bamba, Aya ; Doty, John P. ; Iizuka, Ryo ; Sato, Toshiki ; Kurashima, Sho ; Nakaniwa, Nozomi ; Asai, Ryota ; Ishida, Manadu ; Mori, Hideyuki ; Soong, Yang ; Okajima, Takashi ; Serlemitsos, Peter ; Tawara, Yuzuru ; Mitsuishi, Ikuyuki ; Ishibashi, Kazunori ; Tamura, Keisuke ; Hayashi, Takayuki ; Furuzawa, Akihiro ; Sugita, Satoshi ; Miyazawa, Takuya ; Awaki, Hisamitsu ; Miller, Eric D. ; Yamaguchi, Hiroya. / In-orbit performance of the soft X-ray imaging system aboard Hitomi (ASTRO-H). In: Publications of the Astronomical Society of Japan. 2018 ; Vol. 70, No. 2.
@article{747d70167b3c4e2a987f24f6bc456aa6,
title = "In-orbit performance of the soft X-ray imaging system aboard Hitomi (ASTRO-H)",
abstract = "We describe the in-orbit performance of the soft X-ray imaging system consisting of the Soft X-ray Telescope and the Soft X-ray Imager aboard Hitomi. Verification and calibration of imaging and spectroscopic performance are carried out, making the best use of the limited data of less than three weeks. Basic performance, including a large field of view of 38 × 38, is verified with the first-light image of the Perseus cluster of galaxies. Amongst the small number of observed targets, the on-minus-off pulse image for the out-of-time events of the Crab pulsar enables us to measure the half-power diameter of the telescope as ∼1.3. The average energy resolution measured with the onboard calibration source events at 5.89 keV is 179 ± 3 eV in full width at half maximum. Light leak and crosstalk issues affected the effective exposure time and the effective area, respectively, because all the observations were performed before optimizing an observation schedule and the parameters for the dark-level calculation. Screening the data affected by these two issues, we measure the background level to be 5.6 × 10−6 counts s−1 arcmin−2 cm−2 in the energy band of 5–12 keV, which is seven times lower than that of the Suzaku XIS-BI.",
author = "Hiroshi Nakajima and Yoshitomo Maeda and Hiroyuki Uchida and Takaaki Tanaka and Hiroshi Tsunemi and Kiyoshi Hayashida and Tsuru, {Takeshi G.} and Tadayasu Dotani and Ryo Nagino and Shota Inoue and Masanobu Ozaki and Hiroshi Tomida and Chikara Natsukari and Shutaro Ueda and Koji Mori and Makoto Yamauchi and Isamu Hatsukade and Yusuke Nishioka and Miho Sakata and Tatsuhiko Beppu and Daigo Honda and Masayoshi Nobukawa and Hiraga, {Junko S.} and Takayoshi Kohmura and Hiroshi Murakami and Nobukawa, {Kumiko K.} and Aya Bamba and Doty, {John P.} and Ryo Iizuka and Toshiki Sato and Sho Kurashima and Nozomi Nakaniwa and Ryota Asai and Manadu Ishida and Hideyuki Mori and Yang Soong and Takashi Okajima and Peter Serlemitsos and Yuzuru Tawara and Ikuyuki Mitsuishi and Kazunori Ishibashi and Keisuke Tamura and Takayuki Hayashi and Akihiro Furuzawa and Satoshi Sugita and Takuya Miyazawa and Hisamitsu Awaki and Miller, {Eric D.} and Hiroya Yamaguchi",
year = "2018",
month = "3",
day = "1",
doi = "10.1093/pasj/psx116",
language = "English",
volume = "70",
journal = "Publication of the Astronomical Society of Japan",
issn = "0004-6264",
publisher = "Astronomical Society of Japan",
number = "2",

}

Nakajima, H, Maeda, Y, Uchida, H, Tanaka, T, Tsunemi, H, Hayashida, K, Tsuru, TG, Dotani, T, Nagino, R, Inoue, S, Ozaki, M, Tomida, H, Natsukari, C, Ueda, S, Mori, K, Yamauchi, M, Hatsukade, I, Nishioka, Y, Sakata, M, Beppu, T, Honda, D, Nobukawa, M, Hiraga, JS, Kohmura, T, Murakami, H, Nobukawa, KK, Bamba, A, Doty, JP, Iizuka, R, Sato, T, Kurashima, S, Nakaniwa, N, Asai, R, Ishida, M, Mori, H, Soong, Y, Okajima, T, Serlemitsos, P, Tawara, Y, Mitsuishi, I, Ishibashi, K, Tamura, K, Hayashi, T, Furuzawa, A, Sugita, S, Miyazawa, T, Awaki, H, Miller, ED & Yamaguchi, H 2018, 'In-orbit performance of the soft X-ray imaging system aboard Hitomi (ASTRO-H)', Publications of the Astronomical Society of Japan, vol. 70, no. 2, psx116. https://doi.org/10.1093/pasj/psx116

In-orbit performance of the soft X-ray imaging system aboard Hitomi (ASTRO-H). / Nakajima, Hiroshi; Maeda, Yoshitomo; Uchida, Hiroyuki; Tanaka, Takaaki; Tsunemi, Hiroshi; Hayashida, Kiyoshi; Tsuru, Takeshi G.; Dotani, Tadayasu; Nagino, Ryo; Inoue, Shota; Ozaki, Masanobu; Tomida, Hiroshi; Natsukari, Chikara; Ueda, Shutaro; Mori, Koji; Yamauchi, Makoto; Hatsukade, Isamu; Nishioka, Yusuke; Sakata, Miho; Beppu, Tatsuhiko; Honda, Daigo; Nobukawa, Masayoshi; Hiraga, Junko S.; Kohmura, Takayoshi; Murakami, Hiroshi; Nobukawa, Kumiko K.; Bamba, Aya; Doty, John P.; Iizuka, Ryo; Sato, Toshiki; Kurashima, Sho; Nakaniwa, Nozomi; Asai, Ryota; Ishida, Manadu; Mori, Hideyuki; Soong, Yang; Okajima, Takashi; Serlemitsos, Peter; Tawara, Yuzuru; Mitsuishi, Ikuyuki; Ishibashi, Kazunori; Tamura, Keisuke; Hayashi, Takayuki; Furuzawa, Akihiro; Sugita, Satoshi; Miyazawa, Takuya; Awaki, Hisamitsu; Miller, Eric D.; Yamaguchi, Hiroya.

In: Publications of the Astronomical Society of Japan, Vol. 70, No. 2, psx116, 01.03.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - In-orbit performance of the soft X-ray imaging system aboard Hitomi (ASTRO-H)

AU - Nakajima, Hiroshi

AU - Maeda, Yoshitomo

AU - Uchida, Hiroyuki

AU - Tanaka, Takaaki

AU - Tsunemi, Hiroshi

AU - Hayashida, Kiyoshi

AU - Tsuru, Takeshi G.

AU - Dotani, Tadayasu

AU - Nagino, Ryo

AU - Inoue, Shota

AU - Ozaki, Masanobu

AU - Tomida, Hiroshi

AU - Natsukari, Chikara

AU - Ueda, Shutaro

AU - Mori, Koji

AU - Yamauchi, Makoto

AU - Hatsukade, Isamu

AU - Nishioka, Yusuke

AU - Sakata, Miho

AU - Beppu, Tatsuhiko

AU - Honda, Daigo

AU - Nobukawa, Masayoshi

AU - Hiraga, Junko S.

AU - Kohmura, Takayoshi

AU - Murakami, Hiroshi

AU - Nobukawa, Kumiko K.

AU - Bamba, Aya

AU - Doty, John P.

AU - Iizuka, Ryo

AU - Sato, Toshiki

AU - Kurashima, Sho

AU - Nakaniwa, Nozomi

AU - Asai, Ryota

AU - Ishida, Manadu

AU - Mori, Hideyuki

AU - Soong, Yang

AU - Okajima, Takashi

AU - Serlemitsos, Peter

AU - Tawara, Yuzuru

AU - Mitsuishi, Ikuyuki

AU - Ishibashi, Kazunori

AU - Tamura, Keisuke

AU - Hayashi, Takayuki

AU - Furuzawa, Akihiro

AU - Sugita, Satoshi

AU - Miyazawa, Takuya

AU - Awaki, Hisamitsu

AU - Miller, Eric D.

AU - Yamaguchi, Hiroya

PY - 2018/3/1

Y1 - 2018/3/1

N2 - We describe the in-orbit performance of the soft X-ray imaging system consisting of the Soft X-ray Telescope and the Soft X-ray Imager aboard Hitomi. Verification and calibration of imaging and spectroscopic performance are carried out, making the best use of the limited data of less than three weeks. Basic performance, including a large field of view of 38 × 38, is verified with the first-light image of the Perseus cluster of galaxies. Amongst the small number of observed targets, the on-minus-off pulse image for the out-of-time events of the Crab pulsar enables us to measure the half-power diameter of the telescope as ∼1.3. The average energy resolution measured with the onboard calibration source events at 5.89 keV is 179 ± 3 eV in full width at half maximum. Light leak and crosstalk issues affected the effective exposure time and the effective area, respectively, because all the observations were performed before optimizing an observation schedule and the parameters for the dark-level calculation. Screening the data affected by these two issues, we measure the background level to be 5.6 × 10−6 counts s−1 arcmin−2 cm−2 in the energy band of 5–12 keV, which is seven times lower than that of the Suzaku XIS-BI.

AB - We describe the in-orbit performance of the soft X-ray imaging system consisting of the Soft X-ray Telescope and the Soft X-ray Imager aboard Hitomi. Verification and calibration of imaging and spectroscopic performance are carried out, making the best use of the limited data of less than three weeks. Basic performance, including a large field of view of 38 × 38, is verified with the first-light image of the Perseus cluster of galaxies. Amongst the small number of observed targets, the on-minus-off pulse image for the out-of-time events of the Crab pulsar enables us to measure the half-power diameter of the telescope as ∼1.3. The average energy resolution measured with the onboard calibration source events at 5.89 keV is 179 ± 3 eV in full width at half maximum. Light leak and crosstalk issues affected the effective exposure time and the effective area, respectively, because all the observations were performed before optimizing an observation schedule and the parameters for the dark-level calculation. Screening the data affected by these two issues, we measure the background level to be 5.6 × 10−6 counts s−1 arcmin−2 cm−2 in the energy band of 5–12 keV, which is seven times lower than that of the Suzaku XIS-BI.

UR - http://www.scopus.com/inward/record.url?scp=85062966564&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85062966564&partnerID=8YFLogxK

U2 - 10.1093/pasj/psx116

DO - 10.1093/pasj/psx116

M3 - Article

AN - SCOPUS:85062966564

VL - 70

JO - Publication of the Astronomical Society of Japan

JF - Publication of the Astronomical Society of Japan

SN - 0004-6264

IS - 2

M1 - psx116

ER -