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Pushing the limits of the NuSTAR detectors

Grefenstette, Brian W. and Cook, W. Rick and Harrison, Fiona A. and Kitaguchi, Takao and Madsen, Kristin K. and Miyasaka, Hiromasa and Pike, Sean N. (2018) Pushing the limits of the NuSTAR detectors. In: High Energy, Optical, and Infrared Detectors for Astronomy VIII. Proceedings of SPIE. No.10709. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 107092V. ISBN 9781510619715.

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NuSTAR (the Nuclear Spectroscopic Telescope ARray) is a NASA Small Explorer (SMEX) mission launched in June of 2012. Since its launch, NuSTAR has been the preeminent instrument for spectroscopic analysis of the hard X-ray sky over the 3-80 keV bandpass. The low energy side of the bandpass is limited by the absorption along the photon path as well as by the ability of the pixels to trigger on incident photons. The on-board calibration source does not have a low-energy line that we can use to calibrate this part of the response, so instead we use the "nearest-neighbor" readout in the NuSTAR detector architecture to calibrate the individual pixel thresholds for all 8 flight detectors on both focal plane modules (FPMs). These threshold measurements feed back into the quantum efficiency of the detectors at low (<5 keV) energies and, once well-calibrated, may allow the use of NuSTAR data below the current 3 keV limit.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Grefenstette, Brian W.0000-0002-1984-2932
Harrison, Fiona A.0000-0003-2992-8024
Madsen, Kristin K.0000-0003-1252-4891
Miyasaka, Hiromasa0000-0002-8074-4186
Pike, Sean N.0000-0002-8403-0041
Additional Information:© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). BG acknowledges valuable conversations with W. Rick Cook and Jill Burhnam during the development of this paper. This work was supported under NASA Contract No. NNG08FD60C, and made use of data from the NuS-TAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory, and funded by the National Aeronautics and Space Administration. This work makes use of open source code produced by the community, including Astropy, a community-developed core Python package for Astronomy (Astropy Collaboration, 2018) and the SciPy ecosystem. All graphics were produced using Veusz, Copyright (C) 2003-2018 Jeremy Sanders and contributors.
Group:Space Radiation Laboratory, NuSTAR, Astronomy Department
Funding AgencyGrant Number
Series Name:Proceedings of SPIE
Issue or Number:10709
Record Number:CaltechAUTHORS:20181207-145745237
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Official Citation:Brian W. Grefenstette, W. Rick Cook, Fiona A. Harrison, Takao Kitaguchi, Kristin K. Madsen, Hiromasa Miyasaka, Sean N. Pike, "Pushing the limits of NuSTAR detectors," Proc. SPIE 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII, 107092V (9 August 2018); doi: 10.1117/12.2312844
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91582
Deposited By: George Porter
Deposited On:08 Dec 2018 00:09
Last Modified:16 Nov 2021 03:42

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