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J/MNRAS/472/237               OzDES DR1                       (Childress+, 2017)

OzDES multifibre spectroscopy for the Dark Energy Survey: Three year results and first data release. Childress M.J., Lidman C., Davis T.M., Tucker B.E., Asorey J., Yuan F., Abbott T.M.C., Abdalla F.B., Allam S., Annis J., Banerji M., Benoit-Levy A., Bernard S.R., Bertin E., Brooks D., Buckley-Geer E., Burke D.L., Rosell A.Carnero , Carollo D., Carrasco Kind M., Carretero J., Castander F.J., Cunha C.E., Costa L.N.da , D'Andrea C.B., Doel P., Eifler T.F., Evrard A.E., Flaugher B., Foley R.J., Fosalba P., Frieman J., Garcia-Bellido J., Glazebrook K., Goldstein D.A., Gruen D., Gruendl R.A., Gschwend J., Gupta R.R., Gutierrez G., Hinton S.R., Hoormann J.K., James D.J., Kessler R., Kim A.G., King A.L., Kovacs E., Kuehn K., Kuhlmann S., Kuropatkin N., Lagattuta D.J., Lewis G.F., Li T.S., Lima M., Lin H., Macaulay E., Maia M.A.G., Marriner J., March M., Marshall J.L., Martini P., McMahon R.G., Menanteau F., Miquel R., Moller A., Morganson E., Mould J., Mudd D., Muthukrishna D., Nichol R.C., Nord B., Ogando R.L.C., Ostrovski F., Parkinson D., Plazas A.A., Reed S.L., Reil K., Romer A.K., Rykoff E.S., Sako M., Sanchez E., Scarpine V., Schindler R., Schubnell M., Scolnic I.D., Sevilla-Noarbe N., Seymour R., Sharp M., Smith M., Soares-Santos F., Sobreira , Sommer N.E., Spinka H., Suchyta E., Sullivan M., Swanson M.E.C., Tarle G., Uddin S.A., Walker A.R., Wester W., Zhang B.R. (DES Collaboration) <Mon. Not. R. Astron. Soc. 472, 237 (2017)> =2017MNRAS.472..237C (SIMBAD/NED BibCode)
ADC_Keywords: Redshifts ; Spectroscopy ; Galaxy catalogs Keywords: supernovae: general - dark energy Abstract: We present results for the first three years of OzDES, a six-year program to obtain redshifts for objects in the Dark Energy Survey (DES) supernova fields using the 2dF fibre positioner and AAOmega spectrograph on the Anglo-Australian Telescope. OzDES is a multi-object spectroscopic survey targeting multiple types of targets at multiple epochs over a multi-year baseline, and is one of the first multi-object spectroscopic surveys to dynamically include transients into the target list soon after their discovery. At the end of three years, OzDES has spectroscopically confirmed almost 100 supernovae, and has measured redshifts for 17,000 objects, including the redshifts of 2,566 supernova hosts. We examine how our ability to measure redshifts for targets of various types depends on signal-to-noise, magnitude, and exposure time, finding that our redshift success rate increases significantly at a signal-to-noise of 2 to 3 per 1-Angstrom bin. We also find that the change in signal-to-noise with exposure time closely matches the Poisson limit for stacked exposures as long as 10 hours. We use these results to predict the redshift yield of the full OzDES survey, as well as the potential yields of future surveys on other facilities such as 4MOST, PFS, and MSE. This work marks the first OzDES data release, comprising 14,693 redshifts. OzDES is on target to obtain over 30,000 redshifts over the six-year duration of the survey, including a yield of approximately 5,700 supernova host-galaxy redshifts. Description: The table contains redshifts for 14,693 objects that land within the 10 deep fields of the Dark Energy Survey. The redshifts were obtained by the OzDES collaboration using the AAOmega spectrograph and 2dF fibre positioner on the Anglo-Australian Telescope. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file ozdesdr1.dat 88 14693 Positions, redshifts, redshifts quality flags
Byte-by-byte Description of file: ozdesdr1.dat
Bytes Format Units Label Explanations
1- 12 A12 --- OzDES OzDES object number (OzDES_NNNNNN) 14- 23 F10.6 deg RAdeg Right ascension (J2000.0) 25- 34 F10.6 deg DEdeg Declination (J2000.0) 36- 43 F8.5 --- z Redshift (1) 45 I1 --- Flag Redshift quality flag (2) 49- 88 A40 --- types Object type (3)
Note (1): Redshifts are in the heliocentric reference frame Note (2): The redshift quality flag can have one of three values as follows: 6 = securely classified star 4 = redshift based on multiple strong spectroscopic features, >99% confidence. 3 = redshift based typically on a single strong spectroscopic feature or multiple weak features, >95% confidence. Note (3): Some objects can have multiple types
Acknowledgements: Chris Lidman, clidman(at)
(End) Chris Lidman [AAO, Australia], Patricia Vannier [CDS] 21-Sep-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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