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Progress Report on the 6dF Galaxy Survey

Research School of Astronomy and Astrophysics. Australian National University. Progress Report on the 6dF Galaxy Survey. Heath Jones. Observations and Sky Coverage. Redshifts and Redshift Completeness. Results and Planned Data Releases. Campbell, Saunders & Colless, (in prep).

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Progress Report on the 6dF Galaxy Survey

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  1. Research School of Astronomy and Astrophysics Australian National University Progress Report on the 6dF Galaxy Survey Heath Jones • Observations and Sky Coverage • Redshifts and Redshift Completeness • Results and Planned Data Releases

  2. Campbell, Saunders & Colless, (in prep) • 1564 fields assigned across the southern sky • 172000 galaxies Tiling the Sample

  3. Number Covered by Tiles Number of Sources on Sky Tiling the Sample Campbell, Saunders & Colless, (in prep) • 12 samples with tiling completeness 94% or better • 9 samples with tiling completeness 96% or better

  4. The Observing/Reducing Cycle • Preparation, observing, reducing follows the lunar cycle

  5. The Observing/Reducing Cycle • Preparation, observing, reducing follows the lunar cycle • Redshifting takes place in the following lunation

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

  7. Observing Progress • ~650 fieldshave been observed, (as of mid-June) Target is ~1500.

  8. Observing Progress • ~650 fieldshave been observed, (as of mid-June) Target is ~1500.

  9. Observing Progress • ~650 fieldshave been observed, (as of mid-June) Target is ~1500. • Similar observing pattern to 2dF survey

  10. 547 fields 595 fields 422 fields Progress on the Sky • ~1500 field centres assigned across the southern sky • Observing strategy sees sky tackled in thirds…

  11. Progress on the Sky • ~1500 field centres assigned across the southern sky • Observing strategy sees sky tackled in thirds… • ~650 observed, (as of mid-June 2003)

  12. Progress on the Sky • ~1500 field centres assigned across the southern sky • Observing strategy sees sky tackled in thirds… • ~650 observed, (as of mid-June 2003) • ~415 redshifted from 2002-2003 data, (up to mid-May 2003)

  13. 40% coverage down to 4% BOTH 6DF AND LITERATURE REDSHIFTS Redshift Progress On Individual Samples

  14. 2. Successful Redshifts Success Rates (Per Field) 1. Sources through fibres:

  15. Relationship between Completeness and S/N

  16. 34400 galaxies 1300 stars (3%) 450 ISM (1%) 4700 failed (11%) Results from the 6dF Observations • ~65500 objects observed, (as of mid-June) • ~41,000 redshifted

  17. 450 ISM (1%) 1300 stars (3%) 4700 failed (11%) 34400 galaxies 80% of fields > than 80% complete 90% of fields > than 70% Number of Galaxy Redshifts Number of Galaxy Redshifts + Redshift Failures PER FIELD Results from the 6dF Observations • ~65500 objects observed, (as of mid-June) • ~41,000 redshifted

  18. 450 ISM (1%) 1300 stars (3%) 4700 failed (11%) 34400 galaxies Results from the 6dF Observations • ~65500 objects observed, (as of mid-June) • ~41,000 redshifted

  19. Number of Galaxy Redshifts Per Unit Area Number of Galaxy Redshifts + Failures Per Unit Area Galaxy Redshift Completeness - K-band Survey showing 0 to 100%

  20. Number of Galaxy Redshifts Per Unit Area Number of Galaxy Redshifts + Failures Per Unit Area Galaxy Redshift Completeness - K-band Survey showing 50 to 100% MEDIAN ~ 60 % • Only the K-band Survey • Completeness calculated from the 412 redshifted fields, plus literature redshifts • High areal sky coverage does not necessarily imply high redshift completeness

  21. STRIP A Progress in Each Strip • There are 1564 fields on the sky: – 651 (42%) have been observed, – 913 (58%) remain. (as of June 2003) • Coverage by strip:

  22. STRIP A STRIP B Progress in Each Strip • There are 1564 fields on the sky: – 651 (42%) have been observed, – 913 (58%) remain. (as of June 2003) • Coverage by strip:

  23. STRIP A STRIP B STRIP C Progress in Each Strip • There are 1564 fields on the sky: – 651 (42%) have been observed, – 913 (58%) remain. (as of June 2003) • Coverage by strip:

  24. 6dF Galaxy Survey Database http://www-wfau.roe.ac.uk/6dFGS/ Data Releases • Initial release of ~13000 galaxies in December 2002 • Next data release planned for the end 2003/start 2004

  25. Further Information • 6dF Galaxy Survey Home Page – http://www.mso.anu.edu.au/6dFGS/ • 6dFGS Progress Page – http://www.mso.anu.edu.au/6dFGS/Team/Progress_Page/ • 6dFGS Online Database – http://www-wfau.roe.ac.uk/6dFGS/

  26. K-band Redshift Completeness and Observed Fields

  27. STRIP A STRIP B STRIP C Fields Observed and Those Remaining

  28. K-band Completeness and Fields Observed

  29. K-band Completeness and Remaining Fields

  30. 40% coverage down to 4% BOTH 6DF AND LITERATURE REDSHIFTS Redshift Progress On Individual Samples

  31. Redshift Progress On Individual Samples - Breakdown

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