JADES Data Release 4 - Paper II: Data reduction, analysis and emission-line fluxes of the complete spectroscopic sample
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ID: 314012
2026
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Abstract
Abstract We present the fourth data release of JADES, the JWST Advanced Deep Extragalactic Survey, providing deep spectroscopic observations in the two GOODS fields. A companion paper presents the target selection, spectroscopic redshifts and success rates, and in this paper, we discuss the data reduction and present emission line flux measurements. The spectroscopy in this work consists of medium-depth, deep and ultradeep NIRSpec/MSA spectra of 5,190 targets, covering the spectral range 0.6–5.5 µm and observed with both the low-dispersion prism (R = 30–300) and all three medium-resolution gratings (R = 500–1500). We describe the data reduction, analysis and description of the data products included in this data release. In total, we measured 3,297 robust redshifts out of 5,190 targets, spanning a redshift range from z = 0.5 up to z = 14.2, including 974 at z > 4. This data release includes 1-d and 2-d fully reduced spectra with 3 and 5 pixel extractions, with slit-loss corrections and background subtraction optimized for point sources. Furthermore, we provide redshifts and S/N > 5 emission-line flux catalogues for the prism and grating spectra, as well as new guidelines to use these data products. Lastly, we are launching a new JADES Online Database, designed to enable quick selection and browsing of this data release. Altogether, these data provide the largest statistical sample to date including both PRISM and medium grating spectra across full NIRSpec wavelength range to characterise the properties of galaxy populations across Cosmic time.
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| Authors | J Scholtz, S Carniani, E Parlanti, F D’Eugenio, E Curtis-Lake, P Jakobsen, A J Bunker, A J Cameron, S Arribas, W M Baker, S Charlot, J Chevellard, C Circosta, M Curti, Q Duan, D J Eisenstein, K Hainline, Z Ji, B D Johnson, G C Jones, N Kumari, R Maiolino, M V Maseda, M Perna, P G Pérez-González, T Rawle, M Rieke, P Rinaldi, B Robertson, A Saxena, I Shivaei, M S Silcock, Y Sun, B Rodríguez Del Pino, S Tacchella, H Übler, G Venturi, C C Williams, C N A Willmer, C Willott, J Witstok |
| Journal | monthly notices of the royal astronomical society |
| Year | 2026 |
| DOI |
10.1093/mnras/stag939
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| URL | |
| Keywords | Keywords not found |
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