The 6dF Galaxy Survey: final redshift release (DR3) and southern large-scale structures

Jones, D. Heath; Read, Mike; Saunders, Will; Colless, Matthew; Jarrett, T. H.; Parker, Quentin A.; Fairall, A. P.; Mauch, T.; Sadler, E. M.; Watson, Fred; Burton, D.; Campbell, Lachlan; Cass, Paul; Croom, S. M.; Dawe, J. A.; Fiegert, Kristin; Frankcombe, Leela M.; Hartley, M.; Huchra, J. P.; James, D.; Kirby, E.; Lahav, O.; Lucey, J. R.; Mamon, G. A.; Moore, Lesa; Peterson, Bruce A.; Prior, Sayuri L.; Proust, D.; Russell, Ken; Safouris, V.; Wakamatsu, K.; Westra, Eduard; Williams, M.

doi:10.1111/j.1365-2966.2009.15338.x

Cited by 923 publications

(622 citation statements)

References 75 publications

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“…Specifically we use the 6dFGS Data Release 3 (6dFGS DR3; Jones et al 2009), the final redshift release of the survey. As 2MRS, the 6dFGS is based mainly on the Ks-selected 2MASS, but is deeper, with a magnitude limit of Ks,tot = 12.65 mag, where Ks,tot is the total magnitude from the 2MASS.…”

Section: The 6dfgs Catalogmentioning

confidence: 99%

Galaxy groups in the low-redshift Universe

Lim

et al. 2017

Monthly Notices of the Royal Astronomical Society

133

179

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We apply a halo-based group finder to four large redshift surveys, the 2MRS, 6dFGS, SDSS and 2dFGRS, to construct group catalogs in the low-redshift Universe. The group finder is based on that of Yang et al. but with an improved halo mass assignment so that it can be applied uniformly to various redshift surveys of galaxies. Halo masses are assigned to groups according to proxies based on the stellar mass/luminosity of member galaxies. The performances of the group finder in grouping galaxies according to common halos and in halo mass assignments are tested using realistic mock samples constructed from hydrodynamical simulations and empirical models of galaxy occupation in dark matter halos. Our group finder finds ∼ 94% of the correct true member galaxies for 90 − 95% of the groups in the mock samples; the halo masses assigned by the group finder are un-biased with respect to the true halo masses, and have a typical uncertainty of ∼ 0.2 dex. The properties of group catalogs constructed from the observational samples are described and compared with other similar catalogs in the literature.

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Section: The 6dfgs Catalogmentioning

confidence: 99%

Galaxy groups in the low-redshift Universe

Lim

et al. 2017

Monthly Notices of the Royal Astronomical Society

133

179

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“…There is a good quality optical spectrum available from the 6dF database (Jones et al 2009), here reported in Figure 5: surprisingly, it has a clear stellar appearance with well defined Balmer lines with the exception of the Hα, and it is classified as a DA white dwarf.…”

Section: The Cluster Mst 1945−2143 / 2fhlmentioning

confidence: 99%

Two new high-energy γ-ray blazar candidates

Campana

Maselli

Bernieri

et al. 2016

Mon. Not. R. Astron. Soc.

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We report the detection of two new γ-ray sources in the Fermi-LAT sky (Pass 8) at energies higher than 20 GeV, and confirmed at lower energies, using a source detection tool based on the Minimum Spanning Tree algorithm. One of these sources, at a Galactic latitude of about −4 • , is a new discovery, while the other was previously reported above 50 GeV in the 2FHL catalogue. We searched for archival multi-wavelength data of possible counterparts and found interesting candidates. Both objects are radio sources and their WISE infrared colours are typical of blazars. While for the former source no optical spectra are available, for the latter a puzzling optical spectrum corresponding to a white dwarf star is found in the 6dF database. We discuss the spectral energy distributions of both sources and possible interpretations.

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“…Since publishing the previous release of the Stripe 82X catalog, we have mined these additional databases for spectroscopic redshifts: PRIMUS (Coil et al 2011), the Ross et al (2012) pre-BOSS pilot survey with Hectospec, 6dF (Jones et al 2004(Jones et al , 2009, and VVDS (Garilli et al 2008). We also have an ongoing ground-based follow-up campaign to target X-ray sources and have redshifts from WIYN HYDRA from observing runs in 2012 December, 2013 August-September, 2014 January, June, July, September, and 2015 January; from ISAAC on VLT from 2013 August; from NIRSPEC on Keck 2013 September; and from Palomar DoubleSpec from 2014 July and December.…”

Section: A3 Optical Spectroscopymentioning

confidence: 99%

“…We mined the following public spectroscopic catalogs to find redshifts, and where possible, optical classifications of the X-ray sources with SDSS counterparts: SDSS Data Release 12 (DR12; Alam et al 2015), 2SLAQ (Croom et al 2009), pre-BOSS pilot survey using Hectospec on MMT (Ross et al 2012), and 6dF (Jones et al 2004(Jones et al , 2009. We checked by eye the 41 spectra that had the zwarning flag set by the SDSS pipeline.…”

Section: Optical Spectramentioning

confidence: 99%

“…The coadded photometry reaches 1.2-2.2 magnitudes deeper than any single SDSS scan (r∼24.6 versus r∼22.2; Annis et al 2014;Jiang et al 2014), and the full field has existing optical spectroscopy from SDSS and SDSS BOSS (Data Releases 9 and 10; Ahn et al 2012Ahn et al , 2014, 2 SLAQ (Croom et al 2009), and WiggleZ (Drinkwater et al 2010), with partial coverage from DEEP2 (Newman et al 2013), PRIMUS (Coil et al 2011), 6dF (Jones et al 2004(Jones et al , 2009, the VIMOS VLT Deep Survey (VVDS Garilli et al 2008), a deep spectroscopic survey of faint quasars from Jiang et al (2006), and a pre-BOSS pilot survey using Hectospec on MMT (Ross et al 2012). Existing multi-wavelength data in Stripe 82 include near-infrared observations from UKIDSS (Hewett et al 2006;Casali et al 2007; Lawrence et al 2007) and the VISTA Hemisphere Survey (VHS; McMahon et al 2013); farinfrared coverage from Herschel over 79 deg 2 (Viero et al 2014); ultraviolet coverage with GALEX (Morrissey et al 2007); radio observations at 1.4 GHz with Faint Images of the Radio Sky at Twenty centimeters (FIRST) (Becker et al 1995;White et al 1997;Becker et al 2012;Helfand et al 2015), with deeper VLA coverage over 80 deg 2 (Hodge et al 2011); and millimeter observations with the Atacama Cosmology Telescope (ACT; Fowler et al 2007;Swetz et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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THE 31 DEG² RELEASE OF THE STRIPE 82 X-RAY SURVEY: THE POINT SOURCE CATALOG

LaMassa

Urry²,

Cappelluti

et al. 2016

ApJ

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We release the next installment of the Stripe 82 X-ray survey point-source catalog, which currently covers 31.3 deg 2 of the Sloan Digital Sky Survey (SDSS) Stripe 82 Legacy field. In total, 6181 unique X-ray sources are significantly detected with XMM-Newton (>5σ) and Chandra (>4.5σ). This catalog release includes data from XMM-Newton cycle AO 13, which approximately doubled the Stripe 82X survey area. The flux limits of the Stripe 82X survey are 8.7×10 −16 erg s −1 cm −2 , 4.7×10 −15 erg s −1 cm −2 , and 2.1×10 −15 erg s −1 cm −2 in the soft (0.5-2 keV), hard (2-10 keV), and full bands (0.5-10 keV), respectively, with approximate half-area survey flux limits of 5.4×10 −15 erg s −1 cm −2 , 2.9×10 −14 erg s −1 cm −2 , and 1.7×10 −14 erg s −1 cm −2 . We matched the X-ray source lists to available multi-wavelength catalogs, including updated matches to the previous release of the Stripe 82X survey; 88% of the sample is matched to a multi-wavelength counterpart. Due to the wide area of Stripe 82X and rich ancillary multi-wavelength data, including coadded SDSS photometry, mid-infrared WISE coverage, near-infrared coverage from UKIDSS and VISTA Hemisphere Survey, ultraviolet coverage from GALEX, radio coverage from FIRST, and far-infrared coverage from Herschel, as well as existing ∼30% optical spectroscopic completeness, we are beginning to uncover rare objects, such as obscured high-luminosity active galactic nuclei at high-redshift. The Stripe 82X point source catalog is a valuable data set for constraining how this population grows and evolves, as well as for studying how they interact with the galaxies in which they live.

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The 6dF Galaxy Survey: final redshift release (DR3) and southern large-scale structures

Cited by 923 publications

References 75 publications

Galaxy groups in the low-redshift Universe

Galaxy groups in the low-redshift Universe

Two new high-energy γ-ray blazar candidates

THE 31 DEG² RELEASE OF THE STRIPE 82 X-RAY SURVEY: THE POINT SOURCE CATALOG

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The 6dF Galaxy Survey: final redshift release (DR3) and southern large-scale structures

Cited by 923 publications

References 75 publications

Galaxy groups in the low-redshift Universe

Galaxy groups in the low-redshift Universe

Two new high-energy γ-ray blazar candidates

THE 31 DEG2 RELEASE OF THE STRIPE 82 X-RAY SURVEY: THE POINT SOURCE CATALOG

Contact Info

Product

Resources

About

THE 31 DEG² RELEASE OF THE STRIPE 82 X-RAY SURVEY: THE POINT SOURCE CATALOG