The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) Survey Design, Reductions, and Detections
Karl Gebhardt, Erin Mentuch Cooper, Robin Ciardullo, Viviana, Acquaviva, Ralf Bender, William P. Bowman, Barbara G. Castanheira, Gavin, Dalton, Dustin Davis, Roelof S. de Jong, D. L. DePoy, Yaswant Devarakonda,, Sun Dongsheng, Niv Drory, Maximilian Fabricius, Daniel J. Farrow

TL;DR
HETDEX is a large spectroscopic survey designed to measure redshifts of over a million Lyα emitting galaxies between redshifts 1.88 and 3.52, enabling precise cosmological measurements of the universe's expansion.
Contribution
This paper details the design, calibration, and data processing methods of HETDEX, a novel wide-field integral field spectroscopic survey targeting high-redshift galaxies.
Findings
Survey successfully detects emission-line sources with required specifications.
Achieved high astrometric accuracy and flux calibration in initial data.
Demonstrated capability to measure cosmological parameters with <1% accuracy.
Abstract
We describe the survey design, calibration, commissioning, and emission-line detection algorithms for the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). The goal of HETDEX is to measure the redshifts of over a million Ly emitting galaxies between 1.88<z<3.52, in a 540 deg^2 area encompassing a co-moving volume of 10.9 Gpc^3. No pre-selection of targets is involved; instead the HETDEX measurements are accomplished via a spectroscopic survey using a suite of wide-field integral field units distributed over the focal plane of the telescope. This survey measures the Hubble expansion parameter and angular diameter distance, with a final expected accuracy of better than 1%. We detail the project's observational strategy, reduction pipeline, source detection, and catalog generation, and present initial results for science verification in the COSMOS, Extended Groth Strip, and…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Galaxies: Formation, Evolution, Phenomena · Particle Detector Development and Performance
