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6 July 2018 Effective area calibration of the nuclear spectroscopic telescope array (NuSTAR)
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Abstract
The Nuclear Spectroscopic Telescope ARray (NuSTAR) has been in orbit for 6 years, and with the calibration data accumulated over that period we have taken a new look at the effective area calibration. The NuSTAR 10-m focal length is achieved using an extendible mast, which flexes due to solar illumination. This results in individual observations sampling a range of off-axis angles rather than a particular off-axis angle. In our new approach, we have split over 50 individual Crab observations into segments at particular off-axis angles. We combine segments from different observations at the same off-axis angle to generate a new set of synthetic spectra, which we use to calibrate the vignetting function of the optics against the canonical Crab spectrum.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kristin K. Madsen, Walter Cook, Karl Forster, Brian Grefenstette, Fiona Harrison, Hiromasa Miyasaka, and Sean Pike "Effective area calibration of the nuclear spectroscopic telescope array (NuSTAR)", Proc. SPIE 10699, Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray, 106991W (6 July 2018); https://doi.org/10.1117/12.2313675
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12 PAGES + PRESENTATION

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