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The JWST resolved stellar populations early release science program I.: NIRCam Flux Calibration


Boyer, ML and Anderson, J and Gennaro, M and Geha, M and Wingfield McQuinn, KB and Tollerud, E and Correnti, M and Brenner Newman, MJ and Cohen, RE and Kallivayalil, N and Beaton, R and Cole, AA and Dolphin, A and Kalirai, JS and Sandstrom, KM and Savino, A and Skillman, ED and Weisz, DR and Williams, BF, The JWST resolved stellar populations early release science program I.: NIRCam Flux Calibration, American Astronomical Society. Bulletin, 6 pp. 1-5. ISSN 2330-9458 (2022) [Non Refereed Article]

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DOI: doi:10.3847/2515-5172/ac923a


We use globular cluster data from the Resolved Stellar Populations Early Release Science (ERS) program to validate the flux calibration for the Near Infrared Camera (NIRCam) on the James Webb Space Telescope. We find a significant flux offset between the eight short wavelength detectors, ranging from 1% to 23% (~0.01-0.2 mag) that affects all NIRCam imaging observations. We deliver improved zero-points for the ERS filters and show that alternate zero-points derived by the community also improve the calibration significantly. We also find that the detector offsets appear to be time variable by up to at least 0.1 mag.

Item Details

Item Type:Non Refereed Article
Keywords:space telescopes, photometry, infrared
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Astronomical instrumentation
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Cole, AA (Professor Andrew Cole)
ID Code:153493
Year Published:2022
Deposited By:Physics
Deposited On:2022-09-20
Last Modified:2022-09-27

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