The GLASS-JWST Early Release Science programme: The NIRISS spectroscopic catalogue

¹ INAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, 35122 Padova, Italy
² University of California, Los Angeles, Department of Physics and Astronomy, 430 Portola Plaza, Los Angeles, CA 90095, USA
³ Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
⁴ School of Physics, University of Melbourne, Parkville, Vic 3010, Australia
⁵ Australian Research Council Centre of Excellence for All-Sky Astrophysics in 3-Dimensions, Australia
⁶ School of Astronomy and Space Science, University of Chinese Academy of Sciences (UCAS), Beijing 100049, PR China
⁷ School of Physics and Technology, Wuhan University (WHU), Wuhan 430072, PR China
⁸ IPAC, California Institute of Technology, 1200 E. California Blvd, Pasadena, CA 91125, USA
⁹ Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy
¹⁰ INAF – OAS, Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, via Gobetti 93/3, I-40129 Bologna, Italy
¹¹ University of Ljubljana, Department of Mathematics and Physics, Jadranska ulica 19, SI-1000 Ljubljana, Slovenia
¹² INAF – Osservatorio Astronomico di Roma, via Frascati 33, 00078 Monteporzio Catone, Italy
¹³ INAF – IASF Milano, via A. Corti 12, I-20133 Milano, Italy
¹⁴ Department of Physics and Astronomy, University of California, Davis, 1 Shields Ave, Davis, CA 95616, USA
¹⁵ Department of Physics and Astronomy, Tufts University, 574 Boston Ave., Medford, MA 02155, USA
¹⁶ Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia
¹⁷ School of Astronomy and Space Science, University of Chinese Academy of Sciences (UCAS), Beijing 100049, China
¹⁸ National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
¹⁹ Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, China

^⋆ Corresponding author: peter.watson@inaf.it

Received: 1 April 2025
Accepted: 28 May 2025

Abstract

We present a spectroscopic redshift catalogue of sources within the Abell 2744 cluster field, derived from JWST/NIRISS observations, obtained as part of the GLASS-JWST Early Release Science programme. We describe the data reduction, the contamination modelling, and the source detection, as well as the data quality assessment, the redshift determination, and the validation. The catalogue consists of 354 secure and 134 tentative redshifts, of which 245 are new spectroscopic redshifts, spanning the range 0.1≤z≤8.2. These include 17 galaxies at the cluster redshift, one galaxy at z≈8, and a triply imaged galaxy at z = 2.653±0.002. Comparing against galaxies with existing spectroscopic redshifts (z_spec), we find a small offset of Δz=(z_spec−z_NIRISS)/(1+z_spec) =(1.3±1.6)×10⁻³. We also present a forced extraction tool (PYGRIFE) and a visualisation tool (PYGCG) to the community, to aid with the reduction and classification of grism data. This catalogue will enable future studies of the spatially resolved properties of galaxies throughout cosmic noon, including dust attenuation and star formation. As a first application of the catalogue, we discuss the spectroscopic confirmation of multiple image systems and the identification of multiple overdensities at 1<z<2.7.