TY - JOUR
T1 - In-flight calibration of the Hitomi Soft X-ray Spectrometer. (2) Point spread function
AU - Maeda, Yoshitomo
AU - Sato, Toshiki
AU - Hayashi, Takayuki
AU - Iizuka, Ryo
AU - Angelini, Lorella
AU - Asai, Ryota
AU - Furuzawa, Akihiro
AU - Kelley, Richard
AU - Koyama, Shu
AU - Kurashima, Sho
AU - Ishida, Manabu
AU - Mori, Hideyuki
AU - Nakaniwa, Nozomi
AU - Okajima, Takashi
AU - Serlemitsos, Peter J.
AU - Tsujimoto, Masahiro
AU - Yaqoob, Tahir
N1 - Funding Information:
The authors acknowledge the support from the JSPS Core-to-Core Program, and all the JAXA members who have contributed to the ASTRO-H mission. All U.S. members gratefully acknowledge support through the NASA Science Mission Directorate.
Funding Information:
R.I., M.T., and Y.M. acknowledge support from Grants-in-Aid for Scientific Research (numbers 25870744, 25105516, 23540280, JP15H03642, JP16K05309) by the Ministry of Education, Culture, Sports, Science and Technology, Japan., and the Grant-in-Aid for Scientific Research on Innovative Areas: Nuclear matter in neutron stars investigated by experiments and astronomical observations. T.S. is supported by a Grant-in-Aid for the Japan Society for the Promotion of Science Fellows (Grant Number 16J03448).
Publisher Copyright:
© The Author(s) 2018.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - We present results of inflight calibration of the point spread function of the Soft X-ray Telescope that focuses X-rays onto the pixel array of the Soft X-ray Spectrometer system. We make a full array image of a point-like source by extracting a pulsed component of the Crab nebula emission. Within the limited statistics afforded by an exposure time of only 6.9 ks and limited knowledge of the systematic uncertainties, we find that the raytracing model of 1.2 half-power-diameter is consistent with an image of the observed event distributions across pixels. The ratio between the Crab pulsar image and the raytracing shows scatter from pixel to pixel that is 40% or less in all except one pixel. The pixel-to-pixel ratio has a spread of 20%, on average, for the 15 edge pixels, with an averaged statistical error of 17% (1 σ). In the central 16 pixels, the corresponding ratio is 15% with an error of 6%.
AB - We present results of inflight calibration of the point spread function of the Soft X-ray Telescope that focuses X-rays onto the pixel array of the Soft X-ray Spectrometer system. We make a full array image of a point-like source by extracting a pulsed component of the Crab nebula emission. Within the limited statistics afforded by an exposure time of only 6.9 ks and limited knowledge of the systematic uncertainties, we find that the raytracing model of 1.2 half-power-diameter is consistent with an image of the observed event distributions across pixels. The ratio between the Crab pulsar image and the raytracing shows scatter from pixel to pixel that is 40% or less in all except one pixel. The pixel-to-pixel ratio has a spread of 20%, on average, for the 15 edge pixels, with an averaged statistical error of 17% (1 σ). In the central 16 pixels, the corresponding ratio is 15% with an error of 6%.
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U2 - 10.1093/pasj/psx146
DO - 10.1093/pasj/psx146
M3 - Article
AN - SCOPUS:85071365255
SN - 0004-6264
VL - 70
JO - Publication of the Astronomical Society of Japan
JF - Publication of the Astronomical Society of Japan
IS - 2
M1 - psx146
ER -