We present results of inflight calibration of the point spread function (PSF) of the Soft X-ray Telescope (SXT-S) that focuses X-ray onto the pixel array of the Soft X-ray Spectrometer system (SXS). 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~ksec and the limited knowledge of the systematic uncetainties, we find that the raytracing model of 1'.2 half-power-diameter (HPD) 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 sigma). In the central 16 pixels, the corresponding ratio is 15% with an error of 6%.
@article{arxiv.1712.08321,
title = {Inflight Calibration of the Hitomi Soft X-ray Spectrometer (2) Point Spread Function},
author = {Yoshitomo Maeda and Toshiki Sato and Takayuki Hayashi and Ryo Iizuka and Lorella Angelini and Ryota Asai and Akihiro Furuzawa and Richard Kelley and Shu Koyama and Sho Kurashima and Manabu Ishida and Hideyuki Mori and Nozomi Nakaniwa and Takashi Okajima and Peter J. Serlemitsos and Masahiro Tsujimoto and Tahir Yaqoob},
journal= {arXiv preprint arXiv:1712.08321},
year = {2018}
}