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 language | English |
|---|---|
| Article number | psx116 |
| Journal | Publications of the Astronomical Society of Japan |
| Volume | 70 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 01-03-2018 |
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All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
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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 journal › Article
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 -