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Arxiv: JADES NIRSpec Initial Data Release for the Hubble Ultra Deep Field: Redshifts and Line Fluxes of Distant Galaxies from the Deepest JWST Cycle 1 NIRSpec Multi-Object Spectroscopy Published: 6/4/2023 11:44:23 PM Updated: 5/31/2024 7:07:03 PM

Paper abstract: We describe the NIRSpec component of the JWST Deep Extragalactic Survey(JADES), and provide deep spectroscopy of 253 sources targeted with the NIRSpecmicro-shutter assembly in the Hubble Ultra Deep Field and surroundingGOODS-South. The multi-object spectra presented here are the deepest so farobtained with JWST, amounting to up to 28 hours in the low-dispersion (R~30-300) prism, and up to 7 hours in each of the three medium-resolutionR~ 1000 gratings and one high-dispersion grating, G395H(R~2700). Our low-dispersion and medium-dispersion spectra cover thewavelength range 0.6-5.3\mum. We describe the selection of the spectroscopictargets, the strategy for the allocation of targets to micro-shutters, and thedesign of the observations. We present the public release of the reduced 2D and1D spectra, and a description of the reduction and calibration process. Wemeasure spectroscopic redshifts for 178 of the objects targeted extending up toz=13.2. We present a catalog of all emission lines detected at S/N>5, andour redshift determinations for the targets. Combined with the first JADESNIRCam data release, these public JADES spectroscopic and imaging datasetsprovide a new foundation for discoveries of the infrared universe by theworldwide scientific community.