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The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is an unbiased,massively multiplexed spectroscopic survey, designed to measure the expansionhistory of the universe through low-resolution ($R\sim750$) spectra ofLyman-Alpha Emitters. In its search for these galaxies, HETDEX will alsoobserve a few 10$^{5}$ stars. In this paper, we present the first stellarvalue-added catalog within the internal second data release of the HETDEXSurvey (HDR2). The new catalog contains 120,571 low-resolution spectra for98,736 unique stars between $10 < G < 22$ spread across the HETDEX footprint atrelatively high ($b\sim60^\circ$) Galactic latitudes. With these spectra, wemeasure radial velocities (RVs) for $\sim$42,000 unique FGK-type stars in thecatalog and show that the HETDEX spectra are sufficient to constrain these RVswith a 1$\sigma$ precision of 28.0 km/s and bias of 3.5 km/s with respect tothe LAMOST surveys and 1$\sigma$ precision of 27.5 km/s and bias of 14.0 km/scompared to the SEGUE survey. Since these RVs are for faint ($G\geq16$) stars,they will be complementary to Gaia. Using t-Distributed Stochastic NeighborEmbedding (t-SNE), we also demonstrate that the HETDEX spectra can be used todetermine a star's T${\rm{eff}}$, and log g and its [Fe/H]. With the t-SNEprojection of the FGK-type stars with HETDEX spectra we also identify 416 newcandidate metal-poor ([Fe/H] $< -1$~dex) stars for future study. Theseencouraging results illustrate the utility of future low-resolution stellarspectroscopic surveys.

The Stars of the HETDEX Survey. I. Radial Velocities and Metal-Poor Stars from Low-Resolution Stellar Spectra