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Slitless Areal Pure-Parallel HIgh-Redshift Emission Survey (SAPPHIRES): Early Data Release of Deep JWST/NIRCam Images and Spectra in MACS J0416 Parallel Field

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arxiv 2503.15587 v1 pith:4UHQSG7E submitted 2025-03-19 astro-ph.GA

classification astro-ph.GA
keywords nircamdatawfssdeepimaginggalaxyparallelredshifts
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abstract

We present the early data release (EDR) of SAPPHIRES, a JWST Cycle-3 Treasury imaging and spectroscopic survey using the powerful NIRCam wide-field slitless spectroscopic (WFSS) mode in pure parallel. SAPPHIRES will obtain NIRCam imaging and WFSS data in many cosmological deep fields totaling a telescope charged time of 709 hours (557-hour exposures). In this EDR, we present NIRCam imaging and WFSS data obtained in parallel to the Frontier Field galaxy cluster MACS J0416.1-2403, which are attached to primary observations JWST-GO-4750. With a total dual-channel exposure time of 47.2 hours, we obtain deep NIRCam imaging in 13 bands at 0.6--5.0 micron and deep WFSS at 3.1-5.0 micron through the F356W and F444W filters with grisms in orthogonal dispersion directions. We release reduced NIRCam images, photometric catalogs of 22107 sources and WFSS spectra of 1060 sources with confirmed redshifts ($z\simeq0-8.5$). Preliminary value-added catalogs including photometric redshifts, spectroscopic redshifts and physical properties (mass, star-formation rate, etc.) are also made available. We also characterize the data quality and demonstrate scientific applications, including (1) galaxy candidates at the redshift frontier ($z\gtrsim10$), (2) the ionized gas kinematics of a galaxy reconstructed from $R\sim1500$ grism spectra at orthogonal dispersion directions, (3) massive emission-line galaxies and active galactic nuclei (AGN) around the Epoch of Reionization.

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Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. EIGER VII. The evolving relationship between galaxies and the intergalactic medium in the final stages of reionization

    astro-ph.GA 2025-06 conditional novelty 7.0 of 10

    Galaxies and intergalactic transmission switch from anti-correlated at z<5.5 to positively correlated at 5.7<z<6.15, indicating galaxy-driven, inside-out reionization.

  2. A Compact Proto-group at $z \sim 5$: A Massive Galaxy Caught in Formation

    astro-ph.GA 2026-07 conditional novelty 6.5 of 10

    SCGG-z5 is a spectroscopically confirmed compact proto-group of six galaxies at z=4.97 within ~16 pkpc, with total stellar mass log M*/Msun=10.07 and dynamics consistent with a dark-matter-dominated halo that simulati...

  3. NEXUS: A Search for Nuclear Variability with the First Two JWST NIRCam Epochs

    astro-ph.GA 2025-09 conditional novelty 6.0 of 10

    Using two JWST NIRCam epochs, difference imaging finds 465 nuclear variable sources and sets tight F444W variability upper limits of 3 to 10 percent for ten Little Red Dots.

  4. MINERVA: A NIRCam Medium Band and MIRI Imaging Survey to Unlock the Hidden Gems of the Distant Universe

    astro-ph.GA 2025-07 conditional novelty 6.0 of 10

    The MINERVA survey will expand JWST medium-band imaging area by about 7 times and is forecast to cut photometric-redshift scatter and outlier fractions by factors of 3.7 and 2.6.

  5. The Identification of Two JWST/NIRCam-Dark Starburst Galaxies at $z=6.6$ with ALMA

    astro-ph.GA 2025-06 conditional novelty 6.0 of 10

    Two ALMA-detected, JWST/NIRCam-dark starburst galaxies at z=6.6 are presented as viable progenitors of massive quiescent galaxies at z>4, with a poorly constrained number density between 10^-8.1 and 10^-5.5 Mpc^-3.

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