CEERS MIRI Imaging: Data Reduction and Quality Assessment
Abstract
The Cosmic Evolution Early Release Science Survey (CEERS), targeting the Extended Groth Strip extragalactic field, is one of the JWST Director's Discretionary Early Release Science programs. To date, all observations have been executed and include NIRCam/MIRI imaging and NIRSpec/NIRCam spectroscopic exposures. Here, we discuss the MIRI imaging, which includes eight pointings, four of which provide deep imaging with the bluer bands (F560W, F770W) and four with contiguous wavelength coverage in F1000W, F1280W, F1500W, and F1800W, where two of these also include coverage in F770W and F2100W. We present a summary of the data, the data quality, and data reduction. The data reduction is based on the JWST Calibration Pipeline combined with custom modifications and additional steps designed to enhance the output quality, including improvements in astrometry and the removal of detector artifacts. We estimate the image depth of the reduced mosaics, and show that these generally agree with expectations from the Exposure Time Calculator. We compare the MIRI F560W and F770W flux densities for bright sources to measurements from Spitzer/IRAC Ch3 (5.8 $μ$m) and Ch4 (8.0 $μ$m), and we find that they agree with systematic differences of $<0.1$ mag. For the redder MIRI bands, we assess their quality by studying the spectral energy distributions (SEDs) of Galactic stars. The SEDs are consistent with the expected Rayleigh-Jeans law with a deviation $\sim 0.03$ mag, indicating that the MIRI colors are reliable. We also discuss all publicly released data products (images and source catalogs), which are available on the CEERS website (https://ceers.github.io/).
Authors 38
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University of Groningen · Space Research Organisation Netherlands
Affiliation as printed
Kapteyn Astronomical Institute , University of Groningen , P.O. Box 800 , 9700 AV Groningen , The Netherlands
SRON Netherlands Institute for Space Research , Postbus 800 , 9700 AV Groningen , The Netherlands
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Affiliation as printed
Department of Physics and Astronomy , Texas A&M University , College Station , TX , 77843-4242 USA
George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy , Texas A&M University , College Station , TX , 77843-4242 USA
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University of Padua · Osservatorio Astronomico di Padova · National Institute for Astrophysics
Affiliation as printed
Dipartimento di Fisica e Astronomia "G.Galilei" , Universitá di Padova , Via Marzolo 8 , I-35131 Padova , Italy
INAF-Osservatorio Astronomico di Padova , Vicolo dell'Osservatorio 5 , I-35122 , Padova , Italy
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Affiliation as printed
Kapteyn Astronomical Institute , University of Groningen , P.O. Box 800 , 9700 AV Groningen , The Netherlands
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University of Massachusetts Amherst
Affiliation as printed
University of Massachusetts Amherst , 710 North Pleasant Street , Amherst , MA 01003-9305 , USA
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Affiliation as printed
NSF's National Optical-Infrared Astronomy Research Laboratory , 950 N. Cherry Ave. , Tucson , AZ 85719 , USA
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Goddard Space Flight Center · Osservatorio Astronomico di Padova · National Institute for Astrophysics
Affiliation as printed
Astrophysics Science Division , Goddard Space Flight Center , Code 665 , Greenbelt , MD 20771 , USA
INAF-Osservatorio Astronomico di Padova , Vicolo dell'Osservatorio 5 , I-35122 , Padova , Italy
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Space Telescope Science Institute
Affiliation as printed
Space Telescope Science Institute , 3700 San Martin Dr. , Baltimore , MD 21218 , USA
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Rochester Institute of Technology
Affiliation as printed
Laboratory for Multiwavelength Astrophysics , School of Physics and Astronomy , Rochester Institute of Technology , 84 Lomb Memorial Drive , Rochester , NY 14623 , USA
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Affiliation as printed
Kapteyn Astronomical Institute , University of Groningen , P.O. Box 800 , 9700 AV Groningen , The Netherlands
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Center for Astrophysics Harvard & Smithsonian
Affiliation as printed
Center for Astrophysics -Harvard & Smithsonian , 60 Garden Street , Cambridge , MA 02138 , USA
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Affiliation as printed
Kapteyn Astronomical Institute , University of Groningen , P.O. Box 800 , 9700 AV Groningen , The Netherlands
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Astronomical Observatory of Rome · National Institute for Astrophysics
Affiliation as printed
INAF -Osservatorio Astronomico di Roma , via di Frascati 33 , 00078 Monte Porzio Catone , Italy
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Affiliation as printed
Kapteyn Astronomical Institute , University of Groningen , P.O. Box 800 , 9700 AV Groningen , The Netherlands
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Affiliation as printed
Department of Physics and Astronomy , Texas A&M University , College Station , TX , 77843-4242 USA
George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy , Texas A&M University , College Station , TX , 77843-4242 USA
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Affiliation as printed
Department of Physics , 196 Auditorium Road , Unit 3046 , University of Connecticut , Storrs , CT 06269 , USA
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University of Sussex · University of Malta
Affiliation as printed
Astronomy Centre , University of Sussex , Falmer , Brighton BN1 9QH , UK
Institute of Space Sciences and Astronomy , University of Malta , Msida MSD 2080 , Malta
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