The Spitzer–HETDEX Exploratory Large-Area Survey. IV. Model-based Multiwavelength Photometric Catalog

  • Leung G
  • Finkelstein S
  • Weaver J
  • et al.
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Abstract

We present a 0.3–4.5 μ m 16-band photometric catalog for the Spitzer/HETDEX Exploratory Large-Area (SHELA) survey. SHELA covers an ∼27 deg 2 field within the footprint of the Hobby–Eberly Telescope Dark Energy Experiment (HETDEX). Here we present new DECam imaging and an 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 ∼ 24.7 (25.1) AB mag, and the optical photometry reaches a 5 σ depth of ∼25.5 AB mag. We measure photometric redshifts and achieve a 1 σ scatter of Δ z /(1 + z ) of 0.04 with available spectroscopic redshifts at 0 ≤ z ≤ 1. This large-area, multiwavelength photometric catalog, combined with spectroscopic information from HETDEX, will enable a wide range of extragalactic science investigations.

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APA

Leung, G. C. K., Finkelstein, S. L., Weaver, J. R., Papovich, C., Larson, R. L., Chworowsky, K., … Yung, L. Y. A. (2023). The Spitzer–HETDEX Exploratory Large-Area Survey. IV. Model-based Multiwavelength Photometric Catalog. The Astrophysical Journal Supplement Series, 269(2), 46. https://doi.org/10.3847/1538-4365/acfe78

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