The 2-degree Field Lensing Survey
Our redshift catalogues are publicly-available via the "Data Release" tab on the left.
Please also see the 2dFLenS survey paper (Blake et al. 2016, MNRAS, 462, 4240) and our joint cosmological analysis of lensing and large-scale structure statistics. (Joudaki et al. 2018, MNRAS, 474, 4894).
2dFLenS is a galaxy redshift survey performed at the Australian Astronomical Observatory to extend the spectroscopic-redshift coverage of deep-imaging gravitational lensing surveys in the southern sky, in particular the Kilo-Degree Survey. The overlap of 2dFLenS and the KiDS-450 data release is illustrated in the following plot.
The science goals of 2dFLenS were to perform new tests of gravitational physics, and to promote the development of algorithms for the joint analysis of imaging and spectroscopic data including galaxy-galaxy lensing, redshift-space distortion and photometric-redshift calibration.
The 2dFLenS sample consists of 70,079 redshifts, including 40,531 Luminous Red Galaxies spanning redshift range z < 0.9, and 28,269 redshifts which form a magnitude-limited nearly-complete sub-sample in the magnitude range 17 < r < 19.5. Further key statistics are collected in the table below. For more details, please refer to the 2dFLenS survey paper (Blake et al. 2016, MNRAS, 462, 4240).
|Total number of redshifts||70,079|
|Survey area||731 sq deg, mostly in KiDS-South|
|Redshift range||z < 0.9|
|AAT nights used||53 (63% clear)|
|Survey duration||17/9/14 - 5/1/16 (14B, 15A, 15B semesters)|
|AAT fields observed||275, 45-min integrations|