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Paper detail

The JWST Resolved Stellar Populations Early Release Science Program I.: NIRCam Flux Calibration

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 (JWST). We find a significant flux offset between the eight short wavelength detectors, ranging from 1-23% (about 0.01-0.2 mag) that affects all NIRCam imaging observations. We deliver improved zeropoints for the ERS filters and show that alternate zeropoints 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.

preprint2022arXivOpen access
Martha L. BoyerJay AndersonMario GennaroMarla GehaKristen B. Wingfield McQuinnErik TollerudMatteo CorrentiMax J. Brenner NewmanRoger E. CohenNitya KallivayalilRachel BeatonAndrew A. ColeAndrew DolphinJason S. KaliraiKarin M. SandstromAlessandro SavinoEvan D. SkillmanDaniel R. WeiszBenjamin F. Williams
astro-ph.COastro-ph.GAastro-ph.IMastro-ph.EPastro-ph.SR
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Martha L. BoyerJay AndersonMario GennaroMarla GehaKristen B. Wingfield McQuinnErik TollerudMatteo CorrentiMax J. Brenner NewmanRoger E. CohenNitya KallivayalilRachel BeatonAndrew A. ColeAndrew DolphinJason S. KaliraiKarin M. SandstromAlessandro SavinoEvan D. SkillmanDaniel R. WeiszBenjamin F. Williams

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