The Second Data Release of the KODIAQ Survey
  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).
