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The First Focused Hard X-Ray Images of the Sun with NuSTARWe present results from the first campaign of dedicated solar observations undertaken by the Nuclear Spectroscopic Telescope ARray (NuSTAR) hard X-ray (HXR) telescope. Designed as an astrophysics mission, NuSTAR nonetheless has the capability of directly imaging the Sun at HXR energies (3 keV) with an increase in sensitivity of at least two magnitude compared to current non-focusing telescopes. In this paper we describe the scientific areas where NuSTAR will make major improvements on existing solar measurements. We report on the techniques used to observe the Sun with NuSTAR, their limitations and complications, and the procedures developed to optimize solar data quality derived from our experience with the initial solar observations. These first observations are briefly described, including the measurement of the Fe K-shell lines in a decaying X-class flare, HXR emission from high in the solar corona, and full-disk HXR images of the Sun.
Document ID
20170003741
Document Type
Reprint (Version printed in journal)
Authors
Grefenstette, Brian W. (California Inst. of Tech. Pasadena, CA, United States)
Glesener, Lindsay (Minnesota Univ. Minneapolis, MN, United States)
Kruckner, Sam (California Univ. Berkeley, CA, United States)
Hudson, Hugh (California Univ. Berkeley, CA, United States)
Hannah, Iain G. (Glasgow Univ. United Kingdom)
Smith, David M. (California Univ. Santa Cruz, CA, United States)
Vogel, Julia K. (Lawrence Livermore National Lab. Livermore, CA, United States)
White, Stephen M. (Air Force Research Lab. Albuquerque, NM, United States)
Madsen, Kristin K. (California Inst. of Tech. Pasadena, CA, United States)
Marsh, Andrew J. (California Univ. Santa Cruz, CA, United States)
Shih, Albert (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
April 20, 2017
Publication Date
July 18, 2016
Publication Information
Publication: The Astrophysical Journal
Volume: 836
Issue: 1
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN40992
Funding Number(s)
CONTRACT_GRANT: NNG08FD60C
CONTRACT_GRANT: NNX14AN84G
CONTRACT_GRANT: DE-AC52-07NA27344
CONTRACT_GRANT: NNX12AJ36G
CONTRACT_GRANT: NNX14AG07G
CONTRACT_GRANT: NNX15AK26G
CONTRACT_GRANT: NNX13AM41H
Distribution Limits
Public
Copyright
Other