University of Tasmania
Browse

File(s) under permanent embargo

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

journal contribution
posted on 2023-05-21, 19:40 authored by Boyer, ML, Anderson, J, Gennaro, M, Geha, M, Wingfield McQuinn, KB, Tollerud, E, Correnti, M, Brenner Newman, MJ, Cohen, RE, Kallivayalil, N, Beaton, R, Andrew ColeAndrew Cole, Dolphin, A, Kalirai, JS, Sandstrom, KM, Savino, A, Skillman, ED, Weisz, DR, Williams, BF
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.

History

Publication title

American Astronomical Society. Bulletin

Volume

6

Pagination

1-5

ISSN

2330-9458

Department/School

School of Natural Sciences

Publisher

American Astronomical Society

Place of publication

United States

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC