Bagley_2023_ApJL_946_L12.pdf (8.91 MB)
CEERS epoch 1 NIRCam imaging: reduction methods and simulations enabling early JWST science results
journal contribution
posted on 2023-06-10, 06:51 authored by MB Bagley, SL Finkelstein, AM Koekemoer, HC Ferguson, PA Haro, M Dickinson, JS Kartaltepe, C Papovich, PG Pérez-González, N Pirzkal, RS Somerville, CNA Willmer, G Yang, Stephen WilkinsStephen Wilkins, othersWe present the data release and data reduction process for the Epoch 1 NIRCam observations for the Cosmic Evolution Early Release Science Survey (CEERS). These data consist of NIRCam imaging in six broadband filters (F115W, F150W, F200W, F277W, F356W and F444W) and one medium-band filter (F410M) over four pointings, obtained in parallel with primary CEERS MIRI observations. We reduced the NIRCam imaging with the JWST Calibration Pipeline, with custom modifications and reduction steps designed to address additional features and challenges with the data. Here we provide a detailed description of each step in our reduction and a discussion of future expected improvements. Our reduction process includes corrections for known prelaunch issues such as 1/f noise, as well as in-flight issues including snowballs, wisps, and astrometric alignment. Many of our custom reduction processes were first developed with prelaunch simulated NIRCam imaging over the full 10 CEERS NIRCam pointings. We present a description of the creation and reduction of this simulated data set in the Appendix. We provide mosaics of the real images in a public release, as well as our reduction scripts with detailed explanations to allow users to reproduce our final data products. These represent one of the first official public data sets released from the Directors Discretionary Early Release Science (DD-ERS) program.
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- Published
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- Published version
Journal
Astrophysical Journal LettersISSN
2041-8205Publisher
American Astronomical SocietyExternal DOI
Volume
946Page range
L12 1-23Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2023-04-24First Open Access (FOA) Date
2023-04-24First Compliant Deposit (FCD) Date
2023-04-21Usage metrics
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