Spectral response and effective area functions of the Hitomi imaging instruments

Tahir Yaqoob; Lorella Angelini; Eric D. Miller; Hiroya Yamaguchi; Michael S. Dutka; Robert S. Hill; Hiromitsu Takahashi; Michael Loewenstein; Kristin L. Rutkowski; Hans Krimm; Michael C. Witthoeft

doi:10.1117/1.JATIS.4.4.048005

13 December 2018 Spectral response and effective area functions of the Hitomi imaging instruments

Tahir Yaqoob, Lorella Angelini, Eric D. Miller, Hiroya Yamaguchi, Michael S. Dutka, Robert S. Hill, Hiromitsu Takahashi, Michael Loewenstein, Kristin L. Rutkowski, Hans Krimm, Michael C. Witthoeft

Author Affiliations +

Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 4, Issue 4, 048005 (December 2018). https://doi.org/10.1117/1.JATIS.4.4.048005

Abstract

We describe the tools and the underlying methods and principles for generating the spectral response functions for the four imaging instruments that were flown on the Hitomi x-ray astronomy satellite [Soft X-ray Spectrometer, or SXS; Soft X-ray Imager, or SXI, and two Hard X-ray Imagers, or HXI]. In essence, the spectral response function is a temporally and spatially averaged effective area and line-spread-function. For model-fitting x-ray spectra from an instrument, the spectral response function encapsulates the end-to-end physics of the entire system from telescope to detector, and also includes satellite attitude drift, exposure corrections, and in the case of the HXIs, drift in the telescope/detector alignment system. Accuracy in the construction of the spectral response functions is, therefore, critical to maximize the science return from the data.

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Tahir Yaqoob, Lorella Angelini, Eric D. Miller, Hiroya Yamaguchi, Michael S. Dutka, Robert S. Hill, Hiromitsu Takahashi, Michael Loewenstein, Kristin L. Rutkowski, Hans Krimm, and Michael C. Witthoeft "Spectral response and effective area functions of the Hitomi imaging instruments," Journal of Astronomical Telescopes, Instruments, and Systems 4(4), 048005 (13 December 2018). https://doi.org/10.1117/1.JATIS.4.4.048005

Received: 7 August 2017; Accepted: 5 November 2018; Published: 13 December 2018

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