Year: 2003
Type: preprint
Abstract: The 2dF Galaxy Redshift Survey (2dFGRS) is a major spectroscopic survey taking full advantage of the unique capabilities of the 2dF facility built by the Anglo-Australian Observatory. The 2dFGRS is integrated with the 2dF QSO survey (Croom et al., 2004). The 2dFGRS obtained spectra for 245591 objects, mainly galaxies, brighter than a nominal extinction-corrected magnitude limit of bJ=19.45. Reliable (quality>=3) redshifts were obtained for 221414 galaxies. The galaxies cover an area of approximately 1500 square degrees selected from the extended APM Galaxy Survey in three regions: a North Galactic Pole (NGP) strip, a South Galactic Pole (SGP) strip, and random fields scattered around the SGP strip. Redshifts are measured from spectra covering 3600-8000 Angstroms at a two-pixel resolution of 9.0 Angstrom and a median S/N of 13 per pixel. All redshift identifications are visually checked and assigned a quality parameter Q in the range 1-5; Q>=3 redshifts are 98.4% reliable and have an rms uncertainty of 85 km/s. The overall redshift completeness for Q>=3 redshifts is 91.8% but this varies with magnitude from 99% for the brightest galaxies to 90% for objects at the survey limit (Colless et al., 2007).
Source: arXiv (Cornell University)
Authors: Colless, Matthew, Peterson, Bruce A., Jackson, Carole, Peacock, John A., Cole, Shaun, Norberg, Peder, Baldry, Ivan K., Baugh, Carlton M., Bland-Hawthorn, Joss, Bridges, Terry, Cannon, Russell, Collins, Chris, Couch, Warrick, Cross, Nicholas, Dalton, Gavin, De Propris, Roberto, Driver, Simon P., Efstathiou, George, Ellis, Richard S., Frenk, Carlos S., Glazebrook, Karl, Lahav, Ofer, Lewis, Ian, Lumsden, Stuart, Maddox, Steve, Madgwick, Darren, Sutherland, Will, Taylor, Keith
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1918324942