John Dawe

Publications (3)9.8 Total impact

• Source

  Available from: Ken-ichi Wakamatsu

  Article: The 6dF Galaxy Survey: Final Redshift Release (DR3) and Southern Large-Scale Structures

  D. Heath Jones, Mike A. Read, Will Saunders, Matthew Colless, Tom Jarrett, Quentin Parker, Anthony Fairall, Thomas Mauch, Elaine Sadler, Fred Watson, [......], Gary Mamon, Lesa Moore, Bruce Peterson, Sayuri Prior, Dominique Proust, Ken Russell, Vicky Safouris, Ken-ichi Wakamatsu, Eduard Westra, Mary Williams
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  ABSTRACT: We report the final redshift release of the 6dF Galaxy Survey, a combined redshift and peculiar velocity survey over the southern sky (|b|>10 deg). Its 136,304 spectra have yielded 110,256 new extragalactic redshifts and a new catalogue of 125,071 galaxies making near-complete samples with (K, H, J, r_F, b_J) <= (12.65, 12.95, 13.75, 15.60, 16.75). The median redshift of the survey is 0.053. Survey data, including images, spectra, photometry and redshifts, are available through an online database. We describe changes to the information in the database since earlier interim data releases. Future releases will include velocity dispersions, distances and peculiar velocities for the brightest early-type galaxies, comprising about 10% of the sample. Here we provide redshift maps of the southern local universe with z<=0.1, showing nearby large-scale structures in hitherto unseen detail. A number of regions known previously to have a paucity of galaxies are confirmed as significantly underdense regions. The URL of the 6dFGS database is http://www-wfau.roe.ac.uk/6dFGS
  Monthly Notices of the Royal Astronomical Society 05/2009; · 4.90 Impact Factor
• Source

  Available from: Ken-ichi Wakamatsu

  Article: The 6dF Galaxy Survey: samples, observational techniques and the first data release

  D. Heath Jones, Will Saunders, Matthew Colless, Mike A. Read, Quentin A. Parker, Fred G. Watson, Lachlan A. Campbell, Daniel Burkey, Thomas Mauch, Lesa Moore, [......], Kristin Fiegert, John Dawe, John Huchra, Tom Jarrett, Ofer Lahav, John Lucey, Gary A. Mamon, Dominique Proust, Elaine M. Sadler, Ken-ichi Wakamatsu
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  ABSTRACT: The 6dF Galaxy Survey (6dFGS) aims to measure the redshifts of around 150 000 galaxies, and the peculiar velocities of a 15 000-member subsample, over almost the entire southern sky. When complete, it will be the largest redshift survey of the nearby Universe, reaching out to about z∼ 0.15, and more than an order of magnitude larger than any peculiar velocity survey to date. The targets are all galaxies brighter than Ktot= 12.75 in the 2MASS Extended Source Catalog (XSC), supplemented by 2MASS and SuperCOSMOS galaxies that complete the sample to limits of (H, J, rF, bJ) = (13.05, 13.75, 15.6, 16.75). Central to the survey is the Six-Degree Field (6dF) multifibre spectrograph, an instrument able to record 150 simultaneous spectra over the -field of the UK Schmidt Telescope. An adaptive tiling algorithm has been employed to ensure around 95 per cent fibring completeness over the 17 046 deg2 of the southern sky with | b | > 10°. Spectra are obtained in two observations using separate V and R gratings, that together give R∼ 1000 over at least 4000–7500 Å and signal-to-noise ratio ∼10 per pixel. Redshift measurements are obtained semi-automatically, and are assigned a quality value based on visual inspection. The 6dFGS data base is available at http://www-wfau.roe.ac.uk/6dFGS/, with public data releases occurring after the completion of each third of the survey.
  Monthly Notices of the Royal Astronomical Society 11/2004; 355(3):747 - 763. · 4.90 Impact Factor
• Article: The 6dF Galaxy Survey: progress and data release 1

  Will Saunders, Heath Jones, Mike Read, Lachlan Campbell, Matthew Colless, Malcolm Hartley, Paul Cass, Dionne James, Ken Russell, Kristin Fiegert, Fred Watson, Thomas Mauch, John Dawe, Science Advisory Group
  Anglo-Australian Observatory Epping Newsletter. 03/2004; 104:16.