The Second Data Release of the KODIAQ Survey

Abstract

We present and make publicly available the second data release (DR2) of the Keck Observatory Database of Ionized Absorption toward Quasars (KODIAQ) survey. KODIAQ DR2 consists of a fully-reduced sample of 300 quasars at 0.07 < z_em < 5.29 observed with HIRES at high resolution (36,000 <= R <= 103,000). DR2 contains 831 spectra available in continuum normalized form, representing a sum total exposure time of ~4.9 megaseconds on source. These co-added spectra arise from a total of 1577 individual exposures of quasars taken from the Keck Observatory Archive (KOA) in raw form and uniformly processed. DR2 extends DR1 by adding 130 new quasars to the sample, including additional observations of QSOs in DR1. All new data in DR2 were obtained with the single-chip Tektronix TK2048 CCD configuration of HIRES in operation between 1995 and 2004. DR2 is publicly available to the community, housed as a higher level science product at the KOA and in the igmspec database (v03).

Accepted for publication in the Astronomical Journal. 4 pages, 3 tables, 7 figures

References in corpus (7)

• Metallicity Evolution of Damped Lyman-alpha Systems out to z~5
• Distances to Galactic high-velocity clouds. I. Cohen Stream, complex GCP, cloud g1
• Distances to Galactic high-velocity clouds. Complex C
• An Accurate Distance to High-Velocity Cloud Complex C
• The primordial deuterium abundance of the most metal-poor damped Lyman-alpha system
• The Cosmic Evolution of the Metallicity Distribution of Ionized Gas Traced by Lyman Limit Systems
• Low-metallicity Absorbers Account for Half of the Dense Circumgalactic Gas at z < 1

Cited by in corpus (6)

• MUSE Analysis of Gas around Galaxies (MAGG) -- I: Survey design and the environment of a near pristine gas cloud at z~3.5
• A New Precision Measurement of the Small-Scale Line-of-Sight Power Spectrum of the Ly$\alpha$ Forest
• The ACCELERATION programme: I. Cosmology with the redshift drift
• Thermal state of the intergalactic medium at $z\sim 2-4$
• A Novel Statistical Method for Measuring the Temperature-Density Relation in the IGM Using the $b$-$N_{\text{HI}}$ Distribution of Absorbers in the Ly$\alpha$ Forest
• Jeans smoothing of the Ly$\alpha$ forest absorption lines