Deeper than DEEP: A Spectroscopic Survey of $z>3$ Lyman-$\hat{I}\pm$ Emitters in the Extended Groth Strip

Abstract

We present a spectroscopic survey of Ly$\hat{I}\pm$ emitters in the Extended Groth Strip (EGS) field, targeting the regime near the Epoch of Reionization. Using Keck/DEIMOS, we observed 947 high-$z$ candidates with photometric redshifts from 3 $<z_{\text{phot}}<$ 7 and down to an $H$-band (HST/WFC3 F160W) magnitude limit of < 27.5. Observations were taken over the course of 8 nights, with integration times ranging from 4 to 7.8 hours. Our survey secured 137 unique redshifts, 126 of which are Ly$\hat{I}\pm$ emitters at 2.8 $<z<$ 6.5 with a mean redshift of $\overline{z}=4.3$. We provide a comprehensive redshift catalog for our targets, as well as the reduced one- and two- dimensional spectra for each object. These observations will provide an important auxiliary dataset for the JWST Directors Discretionary Early Release Science (DD-ERS) program the Cosmic Evolution Early Release Science Survey (CEERS), which recently completed near- and mid-IR imaging and spectroscopy of galaxies in the EGS field.

8 pages, 7 figures, 2 tables, Accepted in MNRAS