Stephan M. Birkmann,1 Giovanna Giardino,2 Marco Siriannihttps://orcid.org/0000-0002-7626-6361,1 Pierre Ferruit,3 Bernhard Rauscher,4 Catarina Alves de Oliveira,3 Torsten Böker,1 Nimisha Kumari,5 Nora Lützgendorf,1 Elena Manjavacas,5 Charles Proffitt,6 Timothy D. Rawle,1 Maurice te Plate,1 Peter Zeidler5
1European Space Agency (United States) 2ATG Europe (Netherlands) 3European Space Agency (Spain) 4NASA Goddard Space Flight Ctr. (United States) 5AURA for the European Space Agency (United States) 6Space Telescope Science Institute (United States)
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The Near-Infrared Spectrograph (NIRSpec) is one the four focal plane instruments on the James Webb Space Telescope (JWST) which was launched on December 25, 2021. We present the in-flight status and performance of NIRSpec’s detector system as derived from the instrument commissioning data as available at the time of the conference. The instrument features two 2048 × 2048 HAWAII-2RG sensor chip assemblies (SCAs) that are operated at a temperature of about 42.8 K and are read out via a pair of SIDECAR ASICs. NIRSpec supports “Improved Reference Sampling and Subtraction” (IRS2) readout mode that was designed to meet NIRSpec’s stringent noise requirements and to reduce 1/f and correlated noise. In addition, NIRSpec features subarrays optimized for bright object time series observations, e.g. for the observation of exoplanet transit around bright host stars. We focus on the dark signal as well as the read and total noise performance of the detectors.
Stephan M. Birkmann,Giovanna Giardino,Marco Sirianni,Pierre Ferruit,Bernhard Rauscher,Catarina Alves de Oliveira,Torsten Böker,Nimisha Kumari,Nora Lützgendorf,Elena Manjavacas,Charles Proffitt,Timothy D. Rawle,Maurice te Plate, andPeter Zeidler
"The in-flight noise performance of the JWST/NIRSpec detector system", Proc. SPIE 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave, 121802P (27 August 2022); https://doi.org/10.1117/12.2629545
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Stephan M. Birkmann, Giovanna Giardino, Marco Sirianni, Pierre Ferruit, Bernhard Rauscher, Catarina Alves de Oliveira, Torsten Böker, Nimisha Kumari, Nora Lützgendorf, Elena Manjavacas, Charles Proffitt, Timothy D. Rawle, Maurice te Plate, Peter Zeidler, "The in-flight noise performance of the JWST/NIRSpec detector system," Proc. SPIE 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave, 121802P (27 August 2022); https://doi.org/10.1117/12.2629545