1. The 6dF Galaxy Redshift Survey: Status Report and Data Release 2 Heath Jones ANU/AAO Will Saunders AAO Mike Read Edinburgh Matthew Colless AAO 100,000 REDSHIFTS

2. The 6dF Galaxy Survey: The 6dFGS is designed to be the first of a new generation of combined z+v-surveys, combining…  NIR-selected redshift survey of the local universe  Peculiar velocity survey using FP distances  Additional redshift surveys of other ‘interesting’ source samples.

3. The 6dF Galaxy Survey: The 6dFGS is designed to be the first of a new generation of combined z+v-surveys, combining…  NIR-selected redshift survey of the local universe  Peculiar velocity survey using FP distances  Additional redshift surveys of other ‘interesting’ source samples. Survey strategy… survey whole southern sky with |b|>10° primary z-survey: 2MASS galaxies to K tot <12.75 secondary samples: H<13, J<13.75, r<15.6, b<16.75 11 additional samples: radio, X-ray, IRAS… v-survey: ~15,000 brightest early-type galaxies

4. Selection in the NIR (J,H,K) minimizes extinction effects of extinction - galaxies can be selected over |b|>10° Advantages - NIR selection

5. Selection in the NIR (J,H,K) minimizes extinction effects of extinction - galaxies can be selected over |b|>10°. NIR luminosity is very closely correlated with total stellar mass, and so yields the stellar mass function. log (M stars /h -2 M  ) Advantages - NIR selection Cole et al (2001)

6. Selection in the NIR (J,H,K) minimizes extinction effects of extinction - galaxies can be selected over |b|>10°. NIR luminosity is very closely correlated with total stellar mass, and so yields the stellar mass function. Advantages - Sky Coverage 2dFGRS SDSS The 6dFGS has 8x the sky coverage of the 2dFGRS and twice the coverage of SDSS.

7. Selection in the NIR (J,H,K) minimizes extinction effects of extinction - galaxies can be selected over |b|>10°. NIR luminosity is very closely correlated with total stellar mass, and so yields the stellar mass function. Advantages - NIR selection The 6dFGS has 8x the sky coverage of the 2dFGRS and twice the coverage of SDSS. Traditionally, most redshift surveys have been optically selected and therefore favoured late-type galaxies. In contrast, the NIR selection of 6dFGS is biased towards the redder early-type galaxies needed for the Peculiar Velocity Survey.

8. Target Allocation SamplePriorityTotalSampling 2MASS K s < 12.75811398894.1% 2MASS H < 13.056328391.8% 2MASS J < 13.756200892.7% SuperCosmos r F <15.76919994.9% SuperCosmos b J <17.06974993.8% Target allocation 92% or better for the primary and secondary samples. Number of Tiled Sources Number of Sources on Sky

9. Target Allocation SamplePriorityTotalSampling 2MASS K s < 12.75811398894.1% 2MASS H < 13.056328391.8% 2MASS J < 13.756200892.7% SuperCosmos r F <15.76919994.9% SuperCosmos b J <17.06974993.8% Shapley693985.7% ROSAT All-Sky Survey6291391.7% HIPASS (> 4-sigma)682185.5% IRAS FSC61070794.9% Denis J < 145150593.2% Denis I < 155201761.7% 2MASS AGN4213291.7% Hamburg-ESO Survey4353990.6% NOAO-VLA Sky Survey 4433487.6% Target allocation 92% or better for the primary and secondary samples. Additional target samples extend science and fully exploit survey: 2MASS NIR sky survey DENIS NIR sky survey SuperCosmos galaxy catalogs ROSAT All-Sky Survey (RASS) HI Parkes Sky Survey (HIPASS) IRAS Faint Source Catalog (FSC) NVSS and SUMSS radio surveys Hamburg-ESO QSO survey

10. V grating:  = 5 – 6 A Q=1 - spectra of no value Q=2 - possible z value Q=3 - likely z value Q=4 - z value beyond doubt Q=5 - textbook example R grating:  = 9 – 12 A Q=1 - spectra of no value Q=2 - possible z value Q=3 - acceptable z value Q=4 - z value beyond doubt Q=5 - textbook example Q=6 - Galactic source <1% 0 % 5 % 7 % 77 % 11% DR 2:

11. The Observing/Redshifting Cycle Preparation, observing, reducing follows the lunar cycle 6dFGS

12. The Observing/Redshifting Cycle Preparation, observing, reducing follows the lunar cycle Redshifting takes place in the following lunation Survey results are updated/reported ~6 weeks after observation 6dFGS Mt STROMLO TELESCOPE

13. 6dFGS 2nd Data Release: April 2005 DR2 Jan 2002 – October 2004 for public release  89211 spectra; 83014 unique redshifts; 936 fields 36540 more redshifts (37163 more spectra) than DR1 http://www-wfau.roe.ac.uk/6dFGS/ 6dFGS Online Database: Searchable using either SQL query commands or a WWW form Each source has its own multi-extension FITS file, including 6dF spectrum, brJHK imaging, redshift and photometric information The different target catalogues are also online, fully searchable and inter- linked

14. What’s New Since DR1 Data and database structure largely unchanged since DR1 Recent introduction of a QSO template for redshifting (~Aug 05 onwards) Introduction of Q=6 for confirmed Galactic spectra (formerly Q=2) Around 7% have disparate irreconcilable proximity and mag rankings Around 1% have no br match at all Recalibrated br SUPERCosmos photometry (BMAG, RMAG) and the preservation of the old selection magnitudes (BMAGSEL, RMAGSEL):

15. Median z for 6dFGS (z=0.05) is roughly half that of 2dFGRS and SDSS When complete, the population of 6dFGS galaxies at low redshifts will be on a par with the other surveys Number-Redshift Distribution

16. Redshift Maps: ~90k redshifts 2MASS

17. 547 fields 595 fields 422 fields 1564 fields over southern sky with |b| >10  = 17000   Survey Sky Coverage Observing strategy has been to cover the sky in thirds: (1) central strip; (2) equatorial strip; (3) southern polar cap. 6df

18. 1564 fields over southern sky with |b|>10  = 17000   Observing strategy has been to cover the sky in thirds: (1) central strip; (2) equatorial strip; (3) southern polar cap. 1375 fields observed to date – 936 fields from January 02 to October 04 constituting the Second Data Release Survey Sky Coverage Number of Galaxy Redshifts Per Unit Area Number of Galaxy Redshifts + Failures + Remaining Per Unit Area 6dF+ ZCAT +2dF…

19. Survey Sky Coverage DR 2 (2005) DR 1 (2004)

20. 90% of fields > 60% 80% of fields > 80% complete Number of 6dF Galaxy Redshifts Number of 6dF Galaxy z’s per field + Redshift Failures per field Breakdown of spectra extragalactic (85 %) stellar (3 %) HII regions,PNe (1%) failures (11 %) Field Completeness

21. 6dFGS Second Data Release: Summary Jan 2002 – October 2004  89211 spectra; 83014 unique redshifts; 936 fields Definitive 6dF Survey Paper (DR1):  Jones et al (2004), MNRAS 355, 747 DR2 paper  Jones et al, PASA 6dFGS Home  http://www.aao.gov.au/local/www/6df/ http://www.aao.gov.au/local/www/6df/ 6dFGS Database  http://www-wfau.roe.ac.uk/6dFGS/ MOVED !