CEERS Epoch 1 NIRCam Imaging: Reduction Methods and Simulations Enabling Early JWST Science Results
By M. Bagley, S. Finkelstein, A. Koekemoer, H. Ferguson, P. Haro, Mark Dickinson, J. Kartaltepe, C. Papovich, P. Pérez-González, N. Pirzkal and 27 more. Astrophysical Journal Letters, 2022
164 citations recorded by the source corpus.
We 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.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/6db489101142f03737fb0b10b908192b46014972
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In Astronomy and Astrophysics
- R. Somerville
- P. Hopkins
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- L. Hernquist
- Richard S. Ellis
- Christopher J. Conselice
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- P. V. van Dokkum
In Nuclear and High Energy Physics
Citations in the corpus
- JADES Initial Data Release for the Hubble Ultra Deep Field: Revealing the Faint Infrared Sky with Deep JWST NIRCam Imaging (2023, methodology): “We estimate and subtract any remaining background in the submosaics, following roughly the procedure outlined in Bagley et al. ( 2023 ) .”
- The Complete CEERS Early Universe Galaxy Sample: A Surprisingly Slow Evolution of the Space Density of Bright Galaxies at z ∼ 8.5–14.5 (2023, methodology): “See Bagley et al. ( 2023 ) and F23 for more information on the background method and details on the method ’ s performance in CEERS images.”
- The Rise of Faint, Red Active Galactic Nuclei at z > 4: A Sample of Little Red Dots in the JWST Extragalactic Legacy Fields (2025, unknown): “55 The CEERS, PRIMER, and NGDEEP NIRCam data were processed using the JWST Calibration Pipeline 56 ( versions 1.8.5, 1.10.2, and 1.9.2, respectively ) with custom modi fi cations described in M. B. Bagley et al. ( 2023 ) and S. L. Finkelstein et al. ( 2022 ) .”
- JWST Census for the Mass–Metallicity Star Formation Relations at z = 4–10 with Self-consistent Flux Calibration and Proper Metallicity Calibrators (2023, methodology): “…Release Science ( ERS ) observations of GLASS ( Treu et al. 2022; Morishita et al. 2023; Mascia et al. 2023 ) and CEERS ( Finkelstein et al. 2023; Bagley et al. 2023; Sanders et al. 2023; Tang et al. 2023; Fujimoto et al. 2023; Shapley et al. 2023 ) , two Director ’ s Discretionary Time ( DDT )…”