J/AJ/143/7 Spectroscopic survey of WISE-selected sources (Lake+, 2012)
Optical spectroscopic survey of high-latitude WISE-selected sources.
Lake S.E., Wright E.L., Petty S., Assef R.J., Jarrett T.H., Stanford S.A.,
Stern D., Tsai C.-W.
<Astron. J., 143, 7 (2012)>
=2012AJ....143....7L 2012AJ....143....7L
ADC_Keywords: Redshifts - Galaxy catalogs - Photometry, infrared
Keywords: catalogs - galaxies: general - Galaxy: stellar content - surveys
Abstract:
We report on the results of an optical spectroscopic survey at high
Galactic latitude (|b|≥30°) of a sample of WISE-selected targets,
grouped by WISE W1 (λeff=3.4µm) flux, which we use to
characterize the sources WISE detected. We observed 762 targets in 10
disjoint fields centered on ultraluminous infrared galaxy candidates
using DEIMOS on Keck II. We find 0.30±0.02 galaxies arcmin-2 with
a median redshift of z=0.33±0.01 for the sample with W1≥120µJy.
The foreground stellar densities in our survey range from
0.23±0.07arcmin-2 to 1.1±0.1arcmin-2 for the same sample. We
obtained spectra that produced science grade redshifts for ≥90% of
our targets for sources with W1 flux ≥120µJy that also had an
i-band flux ≥18µJy. We used this for targeting very preliminary
data reductions available to the team in 2010 August. Our results
therefore present a conservative estimate of what is possible to
achieve using WISE's Preliminary Data Release for the study of field
galaxies.
Description:
WISE (Wide-field Infrared Survey Explorer) is an all-sky mid-infrared
survey satellite that NASA launched on 2009 December 14 from
Vandenberg SLC2W. A Preliminary Data Release covering 57% of the sky
took place on 2011 April 14. Here we present the design and results
from the spectroscopic survey we carried out using DEIMOS spectrograph
(Phillips et al. 2002AAS...20113702P 2002AAS...20113702P) on the Keck II telescope on UT
2010 September 14 selected by a W1 flux-classified catalog.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 101 327 WISE-DEIMOS redshift catalog
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See also:
II/307 : WISE Preliminary Data Release (Cutri+ 2011)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
J/MNRAS/417/2230 : BVRI+SDSS+2MASS and WISE photometry of 289 stars
(Bilir+, 2011)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- WISEP WISE Preliminary Release Catalog name, based
on J2000 position
21- 34 F14.10 deg RAdeg Right Ascension (J2000)
36- 49 F14.10 deg DEdeg Declination (J2000)
51- 59 F9.7 --- z Redshift
61- 68 E8.2 --- e_z ? Uncertainty in z (1)
70 I1 --- q_z [3/4] Quality code for z (2)
72- 88 A17 --- Temp SpecPro template used
90- 95 F6.3 mag W1mag [13.531/18.38] WISE band 1 mag.(3.4um) (3)
97-101 F5.3 mag e_W1mag ? Uncertainty in W1mag (1)
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Note (1): Blank entries indicate "nan" values.
Note (2): If the spectrum produced a science grade classification and redshift
we assigned quality class of three or four. If the spectrum was
inconclusive but confirmed the presence of a source then the
quality class is zero, one or two. If there was no evidence of
emission in excess of the sky background anywhere, then the quality
class is -1. Only high quality (q_z≥3) spectra are included in
this table.
Note (3): Magnitudes are Johnson Vega magnitudes from the internal preliminary,
L3o, database. These were the magnitudes used for selection. If the
corresponding value for e_W1mag is NULL/blank then the magnitude
given in this column is a 2-σ upper limit.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 03-Apr-2013