The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope. I. Instrument Overview and In-flight Performance
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Published:2023-09-01
Issue:1051
Volume:135
Page:098001
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ISSN:0004-6280
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Container-title:Publications of the Astronomical Society of the Pacific
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language:
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Short-container-title:PASP
Author:
Doyon RenéORCID, Willott Chris J.ORCID, Hutchings John B., Sivaramakrishnan AnandORCID, Albert LoïcORCID, Lafrenière DavidORCID, Rowlands NeilORCID, Begoña Vila M.ORCID, Martel André R., LaMassa StephanieORCID, Aldridge David, Artigau ÉtienneORCID, Cameron Peter, Chayer PierreORCID, Cook Neil J.ORCID, Cooper Rachel A.ORCID, Darveau-Bernier AntoineORCID, Dupuis Jean, Earnshaw Colin, Espinoza NéstorORCID, Filippazzo Joseph C.ORCID, Fullerton Alexander W.ORCID, Gaudreau Daniel, Gawlik Roman, Goudfrooij PaulORCID, Haley Craig, Kammerer JensORCID, Kendall David, Lambros Scott D., Ignat Luminita Ilinca, Maszkiewicz Michael, McColgan Ashley, Morishita TakahiroORCID, Ouellette Nathalie N.-Q.ORCID, Pacifici CamillaORCID, Philippi Natasha, Radica MichaelORCID, Ravindranath SwaraORCID, Rowe JasonORCID, Roy ArpitaORCID, Roy Niladri, Saad Karl, Sohn Sangmo TonyORCID, Talens Geert JanORCID, Touahri Driss, Thatte Deepashri, Taylor Joanna M.ORCID, Vandal ThomasORCID, Volk KevinORCID, Wander Michel, Warner Gerald, Zheng Sheng-Hai, Zhou Julia, Abraham RobertoORCID, Beaulieu Mathilde, Benneke Björn, Ferrarese LauraORCID, Jayawardhana RayORCID, Johnstone DougORCID, Kaltenegger LisaORCID, Meyer Michael R.ORCID, Pipher Judy L.ORCID, Rameau JulienORCID, Rieke MarciaORCID, Salhi SalmaORCID, Sawicki MarcinORCID
Abstract
Abstract
The Near-Infrared Imager and Slitless Spectrograph (NIRISS) is the science module of the Canadian-built Fine Guidance Sensor onboard the James Webb Space Telescope (JWST). NIRISS has four observing modes: (1) broadband imaging featuring seven of the eight NIRCam broadband filters, (2) wide-field slitless spectroscopy at a resolving power of ∼150 between 0.8 and 2.2 μm, (3) single-object cross-dispersed slitless spectroscopy (SOSS) enabling simultaneous wavelength coverage between 0.6 and 2.8 μm at R ∼ 700, a mode optimized for exoplanet spectroscopy of relatively bright (J < 6.3) stars and (4) aperture masking interferometry (AMI) between 2.8 and 4.8 μm enabling high-contrast (∼10−3 − 10−4) imaging at angular separations between 70 and 400 mas for relatively bright (M < 8) sources. This paper presents an overview of the NIRISS instrument, its design, its scientific capabilities, and a summary of in-flight performance. NIRISS shows significantly better response shortward of ∼2.5 μm resulting in 10%–40% sensitivity improvement for broadband and low-resolution spectroscopy compared to pre-flight predictions. Two time-series observations performed during instrument commissioning in the SOSS mode yield very stable spectro-photometry performance within ∼10% of the expected noise. The first space-based companion detection of the tight binary star AB Dor AC through AMI was demonstrated.
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
22 articles.
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