J/MNRAS/496/19 OzDES DR2 redshift catalogue (Lidman+, 2020)
OzDES multi-object fibre spectroscopy for the Dark Energy Survey: results and
second data release.
Lidman C., Tucker B.E., Davis T.M., Uddin S.A., Asorey J., Bolejko K.,
Brout D., Calcino J., Carollo D., Carr A., Childress M., Hoormann J.K.,
Foley R.J., Galbany L., Glazebrook K., Hinton S.R., Kessler R., Kim A.G.,
King A., Kremin A., Kuehn K., Lagattuta D., Lewis G.F., Macaulay E.,
Malik U., March M., Martini P., Moller A., Mudd D., Nichol R.C.,
Panther F., Parkinson D., Pursiainen M., Sako M., Swann E., Scalzo R.,
Scolnic D., Sharp R., Smith M., Sommer N.E., Sullivan M., Webb S.,
Wiseman P., Yu Z., Yuan F., Zhang B., Abbott T.M.C., Aguena M., Allam S.,
Annis J., Avila S., Bertin E., Bhargava S., Brooks D., Carnero Rosell A.,
Carrasco Kind M., Carretero J., Castander F.J., Costanzi M.,
da Costa L.N., De Vicente J., Doel P., Eifler T.F., Everett S.,
Fosalba P., Frieman J., Garcia-Bellido J., Gaztanaga E., Gruen D.,
Gruendl R.A., Gschwend J., Gutierrez G., Hartley W.G., Hollowood D.L.,
Honscheid K., James D.J., Kuropatkin N., Li T.S., Lima M., Lin H.,
Maia M.A.G., Marshall J.L., Melchior P., Menanteau F., Miquel R.,
Palmese A., Paz-Chinchon F., Plazas A.A., Roodman A., Rykoff E.S.,
Sanchez E., Santiago B., Scarpine V., Schubnell M., Serrano S.,
Sevilla-Noarbe I., Suchyta E., Swanson M.E.C., Tarle G., Tucker D.L.,
Varga T.N., Walker A.R., Wester W., Wilkinson R.D., DES Collaboration
<Mon. Not. R. Astron. Soc., 496, 19 (2020)>
=2020MNRAS.496...19L 2020MNRAS.496...19L
ADC_Keywords: Spectra, optical; Redshifts; Surveys; Transient;
Active gal. nuclei; Supernovae; Magnitudes; Galaxies, spectra
Keywords: transients: supernovae ; quasars: supermassive black holes ;
cosmology: dark energy ; surveys ; catalogues ;
techniques: spectroscopic
Abstract:
We present a description of the Australian Dark Energy Survey (OzDES)
and summarize the results from its 6 years of operations. Using the
2dF fibre positioner and AAOmega spectrograph on the 3.9-m
Anglo-Australian Telescope, OzDES has monitored 771 active galactic
nuclei, classified hundreds of supernovae, and obtained redshifts for
thousands of galaxies that hosted a transient within the 10 deep
fields of the Dark Energy Survey. We also present the second OzDES
data release, containing the redshifts of almost 30 000 sources, some
as faint as rAB=24mag, and 375 000 individual spectra. These data,
in combination with the time-series photometry from the Dark Energy
Survey, will be used to measure the expansion history of the Universe
out to z∼1.2 and the masses of hundreds of black holes out to z∼4.
OzDES is a template for future surveys that combine simultaneous
monitoring of targets with wide-field imaging cameras and wide-field
multi-object spectrographs.
Description:
The Australian Dark Energy Survey (OzDES) has used the 2dF fibre
positioner on the Anglo-Australian Telescope (AAT) to obtain spectra
of thousands of sources in the 10 deep fields of the Dark Energy
Survey (DES) over the 6 years that DES ran.
The Dark Energy Survey (DES) was a 6-year programme, ending in 2019,
using the DECam imager on the CTIO Blanco 4-m telescope in Chile. DES
consisted of two surveys: a wide-field survey covering 5000deg2, and a
deep survey consisting of 10 DECam fields located in several
well-studied extragalactic fields.
Since 2012, OzDES has been targeting sources in the 10 DES deep fields
with the 2dF fibre positioner on the AAT.
Over the 6 years that OzDES ran, OzDES obtained redshifts for
7000 candidate SN hosts (Smith+ 2020AJ....160..267S 2020AJ....160..267S) and
spectroscopically confirmed several hundred SNe.
At the same time, OzDES has monitored a sample of 771 AGN up to z∼4.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ozdesdr2.dat 210 38624 OzDES-DR2 redshift catalogue
sp/* . 38463 OzDES DR2 2dF_AAOmega with the x5700 dichroic
1D spectra in FITS format
sp_both/* . 690 OzDES DR2 2dF_AAOmega with the x5700 and x6700
dichroic 1D Spectra in FITS format
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See also:
IX/49 : XXL Survey: First results (Pierre+, 2016)
II/357 : The Dark Energy Survey (DES): Data Release 1 (Abbott+, 2018)
II/371 : The Dark Energy Survey (DES): Data Release 2 (Abbott+, 2021)
J/A+A/568/A22 : Joint analysis of the SDSS-II & SNLS SNe Ia (Betoule+, 2014)
J/MNRAS/453/4020 : ATLAS 1.4GHz Data Release 3 (Franzen+, 2015)
J/MNRAS/472/273 : OzDES DR1 (Childress+, 2017)
J/AJ/153/107 : Australian Dark Energy Survey (OzDES) QSO cat. (Tie+, 2017)
J/ApJ/862/123 : griz light curves of 15 DES quasars (Mudd+, 2018)
J/MNRAS/481/894 : Rapidly evolving transients in the DES (Pursiainen+, 2018)
J/MNRAS/484/5330 : High-z strong lens candidates from DES (Jacobs+, 2019)
J/ApJ/882/177 : Abundances of 4 member stars of Tucana III (Marshall+, 2019)
J/MNRAS/490/3508 : The Southern Stellar Stream Sp. Survey (S5) (Li+, 2019)
http://docs.datacentral.org.au/ozdes/overview/dr2/ : OzDES DR2 homepage
Byte-by-byte Description of file: ozdesdr2.dat
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Bytes Format Units Label Explanations
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1- 27 A27 --- ID Official DES name or an assigned OzDES name
if unavailable (OzDES_ID)
29- 36 F8.5 deg RAdeg [6.4/99.4] Right Ascension (J2000) (Alpha_J2000)
38- 46 F9.5 deg DEdeg [-59.8/1.1] Declination (J2000) (Delta_J2000)
48- 52 F5.2 mag rmag [13.32/30.14]? DES r-band AB magnitude (rmag)
54- 127 A74 --- Type Assigned type(s); See Section 3.2
(Object_types) (1)
129- 137 F9.6 --- z [-0.018/4.8]? Redshift (z)
139 I1 --- q_z [1/6] Quality of z (qop) (2)
141- 149 A9 --- Trans Type of transient (e.g. SN Ia, SN II, etc.
"None" if no type) (Transient_type)
151- 205 A55 --- Comm Comments from redshifters (Comment)
207- 210 A4 --- Flag "both": a 2dF_AAOmega with both the x5700 and
x6700 dichroic spectrum is available
in the subdirectory "sp_both" in FITS format;
column added by CDS
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Note (1): Source type as in Table 1 and Appendix C:
Transient = Active transients
SN_host = Hosts with rmag<24
SNhostfaint = Hosts with 24<rmag<25
SNfreehost = Host galaxies of previously targeted transients
SNLS = SN hosts from the SNLS survey data
(Astier+ 2006A&A...447...31A 2006A&A...447...31A; Betoule+ 2014, J/A+A/568/A22)
Cooke_host = Host galaxy candidates of transients found in deep
SNLS stacks
Photo-z = For training and testing photometric redshift algorithms
AGN_reverberation = Reverberation mapping programme
(Hoormann+ 2019MNRAS.487.3650H 2019MNRAS.487.3650H)
AGN_monitoring =
DEVILS = Objects in the DEVILS survey (Davies+ 2018MNRAS.480..768D 2018MNRAS.480..768D)
RadioGalaxy_I = Radio Galaxies (higher priority)
RadioGalaxy_II = Radio Galaxies (lower priority)
ClusterGalaxy_I = Cluster Galaxies (higher priority)
ClusterGalaxy_II = Cluster Galaxies (lower priority)
SpARCS = Brightest Cluster Galaxies from the SpARCS survey
(Wilson+ 2009ApJ...698.1943W 2009ApJ...698.1943W)
ELG = Emission Line Galaxies
LRG = Luminous Red Galaxies
XXL_QSO = QSOs in the XXL fields (Pierre+ 2016, IX/49)
QSOHz = High-z quasar candidates
QSO_faint = Faint QSOs in the S1 and S2 fields
QSOc = quasar candidates selected from the Cambridge QSO group
QSOuv = uv-excess quasar candidates
RedMaGiC = For calibrating photometric redshifts of redMaGiC galaxies
(Rozo+ 2016MNRAS.461.1431R 2016MNRAS.461.1431R)
StrongLens = Candidate strong lenses (Nord+ 2016ApJ...827...51N 2016ApJ...827...51N;
Jacobs+ 2019, J/MNRAS/484/5330)
BrightGalaxy = Backup targets during poor conditions
BBstar = stars selected on the basis of blue colours in g-r and r-i
RNDstars = Random star-like objects
FStar =
BrightStar = Backup targets during poor conditions
Tail1,Tail2,Tail3 = 3 star-like objects with colour in the tail-like region
Tertiary = Stars with a broad range of colours to aid calibration
VarObj1 = Variable Object candidate (high priority)
VarObj2 = Variable Object candidate (lower priority)
WhiteDwarf = White dwarfs to aid calibration
Note (2): The redshift quality flag has the following meanings:
4 = redshift based on multiple strong spectroscopic features matched,
>99% confidence (17,800 occurrences).
3 = redshift based typically on a single strong spectroscopic feature
or multiple weak features, >95% confidence (7949 occurrences).
2 = potential redshift associated with typically a single weak feature,
low confidence, not to be used for science (5576 occurrences).
1 = no matching features, thus no constraints on redshift (4453 occurrences).
6 = securely classified star (2846 occurrences).
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History:
Catalog and spectra downloaded on:
https://datacentral.org.au/services/query/ via
https://docs.datacentral.org.au/ozdes/overview/downloading-data/
License: https://academic.oup.com/journals/pages/open_access/
funderpolicies/chorus/standardpublication_model
(End) Emmanuelle Perret [CDS] 18-Aug-2026