progress report on the 6df galaxy survey heath jones redshifts and redshift completeness results and...
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Progress Report on the 6dF Galaxy Survey
Heath Jones
Redshifts and Redshift Completeness
Results and Planned Data Releases
Observations and Sky Coverage
Research School of Astronomy and AstrophysicsAustralian National University
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Tiling the Sample 172000 galaxies
1564 fields assigned across the southern sky
Campbell, Saunders & Colless, (in prep)
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Tiling the Sample
12 samples with tiling completeness 94% or better
9 samples with tiling completeness 96% or better
Sample Priority Total Tiling Completeness
2MASS Ks < 12.75 8 113988 94.1 %
2MASS H < 13.05 6 3283 91.8
2MASS J < 13.75 6 2008 92.7
SuperCOSMOS rF < 15.7 6 9199 94.9
SuperCOSMOS bJ < 17.0 6 9749 93.8
Shapley 6 939 85.7
ROSAT All-Sky Survey 6 2913 91.7
HIPASS (> 4-sigma) 6 821 85.5
IRAF Faint Source Catalogue 6 10707 94.9
Denis J < 14 5 1505 93.2
Denis I < 15 5 2017 61.7
2MASS AGN 4 2132 91.7
Hamburg-ESO Survey 4 3539 90.6
NOAO-VLA Sky Survey 4 4334 87.6
Number of Sources on Sky
Number Covered by Tiles
Campbell, Saunders & Colless, (in prep)
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The Observing/Reducing Cycle
Preparation, observing, reducing follows the lunar cycle
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The Observing/Reducing Cycle
Preparation, observing, reducing follows the lunar cycle
Redshifting takes place in the following lunation
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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
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Observing Progress
~650 fields have been observed, (as of mid-June)
Target is ~1500.
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Observing Progress
~650 fields have been observed, (as of mid-June)
Target is ~1500.
Semester Fields Cumulate
01 A 26 26
01 B 89 115
02 A 193 308
02 B 222 530
03 A 121 651
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Observing Progress
~650 fields have been observed, (as of mid-June)
Target is ~1500.
Semester Fields Cumulate
01 A 26 26
01 B 89 115
02 A 193 308
02 B 222 530
03 A 121 651
Similar observing pattern to 2dF survey
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Progress on the Sky
547 fields
595 fields
422 fields
Observing strategy sees sky tackled in thirds…
~1500 field centres assigned across the southern sky
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Progress on the Sky
~650 observed, (as of mid-June 2003)
~1500 field centres assigned across the southern sky
Observing strategy sees sky tackled in thirds…
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Progress on the Sky
~415 redshifted from 2002-2003 data, (up to mid-May 2003)
~1500 field centres assigned across the southern sky
~650 observed, (as of mid-June 2003)
Observing strategy sees sky tackled in thirds…
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Redshift Progress On Individual Samples Sample Sources Redshifts Coverage
2MASS Ks < 12.75 113988 43226 38 %
2MASS H < 13.05 3283 524 16
2MASS J < 13.75 2008 319 16
SuperCOSMOS rF < 15.7 9199 2690 30
SuperCOSMOS bJ < 17.0 9749 2446 25
Shapley 939 177 19
ROSAT All-Sky Survey 2913 448 15
HIPASS (> 4-sigma) 821 194 24
IRAF Faint Source Catalogue 10707 2341 22
Denis J < 14 1505 151 10
Denis I < 15 2017 179 9
2MASS AGN 2132 111 5
Hamburg-ESO Survey 3539 146 4
SUMSS 4475 544 12
Shanks et al. 466 62 13
NOAO-VLA Sky Survey 4334 224 5
40% coveragedown to 4%
BOTH 6DF AND LITERATURE REDSHIFTS
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Success Rates (Per Field)
1. Sources through fibres: 2. Successful Redshifts
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Relationship between Completeness and S/N
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Results from the 6dF Observations
~65500 objects observed, (as of mid-June)
~41,000 redshifted
34400 galaxies1300 stars (3%)450 ISM (1%)4700 failed (11%)
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Results from the 6dF Observations
~65500 objects observed, (as of mid-June)
~41,000 redshifted
450 ISM (1%)1300 stars (3%)
4700 failed (11%)
34400 galaxies
90% of fields > than 70%
80% of fields > than 80% complete
Number of Galaxy
RedshiftsNumber of Galaxy
Redshifts + Redshift Failures
PER FIELD
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Results from the 6dF Observations
~65500 objects observed, (as of mid-June)
~41,000 redshifted
450 ISM (1%)1300 stars (3%)
4700 failed (11%)
34400 galaxies
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Galaxy Redshift Completeness - K-band Survey
Number of Galaxy Redshifts Per
Unit AreaNumber of Galaxy Redshifts + Failures Per Unit Area
showing 0 to 100%
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Galaxy Redshift Completeness - K-band Survey
Number of Galaxy Redshifts Per
Unit AreaNumber of Galaxy Redshifts + Failures Per Unit Area
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
showing 50 to 100%MEDIAN ~ 60 %
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Progress in Each Strip
There are 1564 fields on the sky:
STRIP A
– 651 (42%) have been observed,
– 913 (58%) remain. (as of June 2003)
Coverage by strip: STRIP A 547 fields 161 observed (29%) 386 remain
STRIP B (595 fields) 428 observed (72%) 167 remain
STRIP C (422 fields) 62 observed (15%) 360 remain
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Progress in Each Strip
There are 1564 fields on the sky:
STRIP A
STRIP B
– 651 (42%) have been observed,
– 913 (58%) remain. (as of June 2003)
Coverage by strip: STRIP A 547 fields 161 observed (29%) 386 remain
STRIP B 595 fields 428 observed (72%) 167 remain
STRIP C (422 fields) 62 observed (15%) 360 remain
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Progress in Each Strip
There are 1564 fields on the sky:
STRIP A 547 fields 161 observed (29%) 386 remain
STRIP B 595 fields 428 observed (72%) 167 remain
STRIP C 422 fields 62 observed (15%) 360 remain
STRIP A
STRIP B
STRIP C
– 651 (42%) have been observed,
– 913 (58%) remain. (as of June 2003)
Coverage by strip:
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Data Releases
Initial release of ~13000 galaxies in December 2002
Next data release planned for the end 2003/start 2004
http://www-wfau.roe.ac.uk/6dFGS/6dF Galaxy Survey Database
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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/
http://www-wfau.roe.ac.uk/6dFGS/ 6dFGS Online Database –
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K-band Redshift Completeness and Observed Fields
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Fields Observed and Those Remaining
STRIP A
STRIP B
STRIP C
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K-band Completeness and Fields Observed
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K-band Completeness and Remaining Fields
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Redshift Progress On Individual Samples Sample Sources Redshifts Coverage
2MASS Ks < 12.75 113988 43226 38 %
2MASS H < 13.05 3283 524 16
2MASS J < 13.75 2008 319 16
SuperCOSMOS rF < 15.7 9199 2690 30
SuperCOSMOS bJ < 17.0 9749 2446 25
Shapley 939 177 19
ROSAT All-Sky Survey 2913 448 15
HIPASS (> 4-sigma) 821 194 24
IRAF Faint Source Catalogue 10707 2341 22
Denis J < 14 1505 151 10
Denis I < 15 2017 179 9
2MASS AGN 2132 111 5
Hamburg-ESO Survey 3539 146 4
SUMSS 4475 544 12
Shanks et al. 466 62 13
NOAO-VLA Sky Survey 4334 224 5
40% coveragedown to 4%
BOTH 6DF AND LITERATURE REDSHIFTS
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Redshift Progress On Individual Samples - Breakdown
Sample Sources 6dF Redshifts
Literature Redshifts
Coverage
2MASS Ks < 12.75 113988 23551 19675 38 %
2MASS H < 13.05 3283 263 261 16
2MASS J < 13.75 2008 164 155 16
SuperCOSMOS rF < 15.7 9199 850 1840 30
SuperCOSMOS bJ < 17.0 9749 989 1457 25
Shapley 939 88 89 19
ROSAT All-Sky Survey 2913 212 236 15
HIPASS (> 4-sigma) 821 69 125 24
IRAF Faint Source Catalogue 10707 752 1589 22
Denis J < 14 1505 62 89 10
Denis I < 15 2017 49 130 9
2MASS AGN 2132 76 35 5
Hamburg-ESO Survey 3539 94 52 4
SUMSS 4475 302 242 12
Shanks et al. 466 1 61 13
NOAO-VLA Sky Survey 4334 208 16 5