The & Surveys:

Data Release 4

First reduced spectra + redshift catalog release

August 7, 2024

The initial release of the UNCOVER reduced spectra and redshift catalogs are now available as part of DR4! The DR4 Spectra release includes all successfully reduced observations taken in July/Aug 2023, with PRISM spectra from 0.6-5µm of 553 objects. For this initial release, the redshift catalog includes only objects with secure or solid (flag_zspec_qual=3 or =2) redshift fits (409 objects).

All catalogs are based on F444W PSF-matched imaging, where the bright cluster galaxies and ICL have been modeled and subtracted. Detection was performed on a noise-equalized long-wavelength image (F277W+F356W+F444W).

In addition to the spectroscopic redshift catalog, we release a catalog of line fluxes that are estimated from each object's msaexp redshift best-fit, and magnifications calculated from the updated v2.0 lensing model using the new spec-zs.

For full details, please see the README and the UNCOVER first spectra release paper.

Please cite Price et al. 2024 when using any of the following data products, and Furtak et al. 2023 when using the MSA target magnification catalog.

Lens model updated release: v2.0

August 7, 2024

Authors: Lukas J. Furtak and Adi Zitrin

The UNCOVER strong lensing (SL) model is a parametric SL model constructed with the UNCOVER JWST data using a new (grid-free) analytic method by A. Zitrin.

In this model release (v2.0), we supply WCS-registered FITS maps of the deflection field (in pixels), convergence, shear, and the lensing potential normalized to Dds/Ds=1. We also supply magnification maps for various source redshifts: 1, 2, 4, 6, 8, 10, 15 and 20. The lensing maps have a FoV of 7.6' x 7.6', which covers the entire central UNCOVER field. We provide maps for the best-fit model in two resolutions, a high-resolution version in 0.04"/pix (JWST NIRCam resolution) and a low-resolution version with 0.1"/pix.

Compared to the v1.1 models, we added 13 spectroscopic redshifts from JWST/NIRSpec MSA and JWST/NIRCam grism observations, and 132 additional cluster members selected from JWST/NIRCam imaging. The additional spectroscopic redshifts in particular constrain the northern and north-western sub-structures that were previously mostly constrained with photometric redshifts.

Please cite Furtak et al. 2023 and Price et al. 2024 when using any of the lensing maps provided here.

For any questions, please contact us at: furtak [at] post.bgu.ac.il

Updated Lensing Magnifications

August 7, 2024

We also release updated lensing magnifications the full UNCOVER photometric sample! The lensing values are computed for each source (from the SUPER photometric catalog) using the best-available redshift (highest to lowest priority: UNCOVER MSA spec-z, literature spec-z, and MegaScience+UNCOVER eazy phot-z).

Note that the IDs in this full-sample catalog are identical to the DR3 IDs.

For full details, please see the README.

Please cite Furtak et al. 2023 (lens modeling), Price et al. 2024 (updated lens model & UNCOVER spec-zs), and Suess et al. 2024 & Weaver et al. 2024 (MegaScience+UNCOVER eazy phot-zs) when using the full-sample magnification catalog.