251. The Spitzer-HETDEX Exploratory Large Area Survey. IV. Model-Based Multi-wavelength Photometric Catalog
- Author
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Leung, Gene C. K., Finkelstein, Steven, Weaver, John, Papovich, Casey, Larson, Rebecca, Chworowsky, Katherine, Ciardullo, Robin, Gawiser, Eric, Gronwall, Caryl, Jogee, Shardha, Kawinwanichakij, Lalitwadee, Somerville, Rachel, Wold, Isak, and Yung, L. Y. Aaron
- Subjects
Astrophysics - Astrophysics of Galaxies ,Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
We present a 0.3--4.5 $\mu$m 16-band photometric catalog for the Spitzer/HETDEX Exploratory Large-Area (SHELA) survey. SHELA covers a $\sim 27$ deg$^2$ field within the footprint of the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). Here we present new DECam imaging and a $rizK_s$-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 $80\%$ ($50\%$) complete at $riz \sim 24.7$ ($25.1$) AB mag, and the optical photometry reaches a $5\sigma$ depth of $\sim 25.5$ AB mag. We measure photometric redshifts and achieve $1\sigma$ scatter of $\Delta z/(1+z)$ of 0.04 with available spectroscopic redshifts at $0 \le z \le 1$. This large area, multi-wavelength photometric catalog, combined with spectroscopic information from HETDEX, will enable a wide range of extragalactic science investigations., Comment: 22 pages, 12 figures, submitted to ApJ
- Published
- 2023