The Spitzer-HETDEX Exploratory Large Area Survey. IV. Model-Based Multi-wavelength Photometric Catalog
Gene C. K. Leung, Steven Finkelstein, John Weaver, Casey Papovich,, Rebecca Larson, Katherine Chworowsky, Robin Ciardullo, Eric Gawiser, Caryl, Gronwall, Shardha Jogee, Lalitwadee Kawinwanichakij, Rachel Somerville, Isak, Wold, and L. Y. Aaron Yung

TL;DR
This paper introduces a comprehensive 16-band photometric catalog for the SHELA survey, combining new imaging and model-based extraction methods to improve source detection and photometry over a large area, facilitating advanced extragalactic research.
Contribution
It presents a new model-based multi-wavelength photometric catalog with enhanced depth and accuracy, validated against existing surveys, covering 27 square degrees with four million sources.
Findings
The catalog reaches 80% completeness at AB mag 24.7 in riz bands.
Photometric redshifts have a 1σ scatter of 0.04 up to z=1.
Model-based photometry captures more flux from resolved sources.
Abstract
We present a 0.3--4.5 m 16-band photometric catalog for the Spitzer/HETDEX Exploratory Large-Area (SHELA) survey. SHELA covers a deg field within the footprint of the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). Here we present new DECam imaging and a -band-selected catalog of four million sources extracted using a fully model-based approach. We validate our photometry by comparing with the model-based DECam Legacy Survey. We analyze the differences between model-based and aperture photometry by comparing with the previous SHELA catalog, finding that our model-based photometry can measure point sources to fainter fluxes and better capture the full emission of resolved sources. The catalog is () complete at () AB mag, and the optical photometry reaches a depth of AB mag. We measure photometric…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Galaxies: Formation, Evolution, Phenomena · Scientific Research and Discoveries
