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• W3101570263 abstract "The determination of galaxy redshifts in James Webb Space Telescope (JWST)'s blank-field surveys will mostly rely on photometric estimates, based on the data provided by JWST's Near-Infrared Camera (NIRCam) at 0.6-5.0 {mu}m and Mid Infrared Instrument (MIRI) at {lambda}>5.0 {mu}m. In this work we analyse the impact of choosing different combinations of NIRCam and MIRI broad-band filters (F070W to F770W), as well as having ancillary data at {lambda}<0.6 {mu}m, on the derived photometric redshifts (zphot) of a total of 5921 real and simulated galaxies, with known input redshifts z=0-10. We found that observations at {lambda}<0.6 {mu}m are necessary to control the contamination of high-z samples by low-z interlopers. Adding MIRI (F560W and F770W) photometry to the NIRCam data mitigates the absence of ancillary observations at {lambda}<0.6 {mu}m and improves the redshift estimation. At z=7-10, accurate zphot can be obtained with the NIRCam broad bands alone when S/N>=10, but the zphot quality significantly degrades at S/N<=5. Adding MIRI photometry with one magnitude brighter depth than the NIRCam depth allows for a redshift recovery of 83-99%, depending on SED type, and its effect is particularly noteworthy for galaxies with nebular emission. The vast majority of NIRCam galaxies with [F150W]=29 AB mag at z=7-10 will be detected with MIRI at [F560W, F770W]<28 mag if these sources are at least mildly evolved or have spectra with emission lines boosting the mid-infrared fluxes." @default.
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• W3101570263 date "2016-12-05" @default.
• W3101570263 modified "2023-10-18" @default.
• W3101570263 title "THE IMPACT OF <i>JWST</i> BROADBAND FILTER CHOICE ON PHOTOMETRIC REDSHIFT ESTIMATION" @default.
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• W3101570263 doi "https://doi.org/10.3847/0067-0049/227/2/19" @default.
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