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Proceedings Paper

Flat-fielding strategy for the JWST/NIRSpec multi-object spectrograph
Author(s): T. D. Rawle; C. Alves de Oliveira; S. M. Birkmann; T. Boeker; G. de Marchi; P. Ferruit; G. Giardino; N. Luetzgendorf; M. Sirianni
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Paper Abstract

The Near-Infrared Spectrograph (NIRSpec) onboard the James Webb Space Telescope (JWST) will be the first space-borne Multi-Object Spectrograph (MOS), comprising a quarter of a million individually addressable microshutters to allow simultaneous observation of ∼100 targets. We present the strategy for flat-fielding the NIRSpec MOS, correcting for the combined effects of the telescope and instrument throughput as well as the detector response. With a highly configurable shutter array, a novel approach is required to ensure that flat- field reference observations do not significantly impact telescope efficiency. We envisage a two-step strategy: 1) Creation of a three-dimensional master flat-field reference (two spatial dimensions, one wavelength) from a small set of well-designed calibration data; 2) Correction of any data frame using a two-dimensional flat-field generated on-the-fly, for that specific MOS configuration, from the master.

Paper Details

Date Published: 29 July 2016
PDF: 10 pages
Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 990446 (29 July 2016); doi: 10.1117/12.2232150
Show Author Affiliations
T. D. Rawle, European Space Agency (United States)
C. Alves de Oliveira, European Space Agency (United States)
S. M. Birkmann, European Space Agency (United States)
T. Boeker, European Space Agency (United States)
G. de Marchi, European Space Research and Technology Ctr. (Netherlands)
P. Ferruit, European Space Research and Technology Ctr. (Netherlands)
G. Giardino, European Space Research and Technology Ctr. (Netherlands)
N. Luetzgendorf, European Space Agency (United States)
M. Sirianni, European Space Agency (United States)

Published in SPIE Proceedings Vol. 9904:
Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave
Howard A. MacEwen; Giovanni G. Fazio; Makenzie Lystrup; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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