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J/AJ/150/111 KODIAQ DR1 (O'Meara+, 2015)
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table2.dat
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Beginning of ReadMe :J/AJ/150/111 KODIAQ DR1 (O'Meara+, 2015)
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The first data release of the KODIAQ survey.
O'Meara J.M., Lehner N., Howk J.C., Prochaska J.X., Fox A.J., Swain M.A.,
Gelino C.R., Berriman G.B., Tran H.
<Astron. J., 150, 111 (2015)>
=2015AJ....150..111O (SIMBAD/NED BibCode)
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ADC_Keywords: QSOs ; Redshifts
Keywords: catalogs - intergalactic medium - quasars: absorption lines -
quasars: general - surveys
Abstract:
We present and make publicly available the first data release (DR1) of
the Keck Observatory Database of Ionized Absorption toward Quasars
(KODIAQ) survey. The KODIAQ survey is aimed at studying galactic and
circumgalactic gas in absorption at high redshift, with a focus on
highly ionized gas traced by O vi, using the HIRES spectrograph on the
KeckI telescope. KODIAQ DR1 consists of a fully reduced sample of 170
quasars at 0.29<z_em_<5.29 observed with HIRES at high resolution
(36000<=R<=103000) between 2004 and 2012. DR1 contains 247 spectra
available in continuum normalized form, representing a sum total
exposure time of 1.6 megaseconds. These coadded spectra arise from a
total of 567 individual exposures of quasars taken from the Keck
Observatory Archive (KOA) in raw form and uniformly processed using a
publicly available HIRES data reduction package. DR1 is publicly
available to the community, housed as a higher level science product
at the KOA. We will provide future data releases that make available
additional quasars, including those with pre-2004 observations taken
with the previous-generation HIRES detectors.
Description:
As part of the Keck Observatory Database of Ionized Absorption toward
Quasars (KODIAQ) survey, we have uniformly processed the HIRES spectra
of hundreds of quasars. The HIRES spectrograph is located on the KeckI
telescope. In this work, we present the first Data Release (DR1) from
the survey.
Data taken over the last two decades from the HIRES spectrograph fall
into three general categories. The first is the earliest data from
1995 to 1997. The second category spans the years 1997-2004. Finally,
the third category covers data from 2004 to the present. The data in
DR1 are all drawn from this last category.
The KODIAQ DR1 comprises 170 quasars observed in the mosaic
configuration of HIRES between 2004 and 2012. Note that one quasar is
a lensed system, so the number of individual sightlines is 171. The
DR1 sample is summarized in Table2.