VII/249 6dF-DR2 Galaxy Survey (Jones+, 2005)
Second Data Release of the 6dF Galaxy Survey.
Jones D.H., Saunders W., Read M., Colless M.
<Publications - Astron. Soc. Australia, 22, 277 (2005)>
=2005PASA...22..277J 2005PASA...22..277J
ADC_Keywords: Surveys; Galaxy catalogs; Redshifts
Keywords: galaxies: statistics, luminosity function -
cosmology: large-scale structure of universe
Abstract:
The 6dF Galaxy Survey is measuring around 150000 redshifts and 15000
peculiar velocities from galaxies over the southern sky at
|b|>10°. When complete, it will be the largest survey of its kind
by more than an order of magnitude. A total of 83014 sources now have
their spectra, redshifts, and near-infrared and optical photometry
available online and searchable through an Structured Query Language
at www.wfau.roe.ac.uk/6dFGS/ .
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
master.dat 127 179262 Master config file used to form the target table
(version April 2005)
spectra.dat 212 89211 Table of spectral observations
(subset of parameters)
--------------------------------------------------------------------------------
See also:
http://www-wfau.roe.ac.uk/6dfgs/ : the 6dFGS Home page
VII/226 : The 2dF Galaxy Redshift Survey 100k Data Release (2dFGRS Team, 2001)
Byte-by-byte Description of file: master.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- TargName Galaxy survey target ID
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 27 F5.2 s RAs Right ascension (J2000)
29 A1 --- DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 39 F4.1 arcsec DEs Declination (J2000)
41 A1 --- P [P] 'P' for programme objects
43 I1 --- W Weight assigned in future fibre allocation
45- 49 F5.2 mag bJmag ?=0 Recalibrated bJ magnitude (BMAG)
51- 53 I3 --- PrID Programme ID number (PROGID in database) (1)
55- 59 F5.2 mag rFmag ?=0 Recalibrated rF magnitude (RMAG)
61 I1 --- S/G [0/4] SuperCOSMOS star/galaxy classifier (2)
63 I1 --- Tile Tile weighting
65- 71 I7 km/s cz Recession velocity cz
73- 75 I3 km/s e_cz Nominal uncertainty in cz
77- 80 I4 --- r_cz Code identifying source of redshift (3)
82 I1 --- q_cz Redshift quality value (4)
84- 91 F8.4 deg GLON Galactic longitude
93-100 F8.4 deg GLAT Galactic latitude
102-106 F5.2 mag AV Galactic extinction in V magnitudes (from
Schlegel et al., 1998ApJ...500..525S 1998ApJ...500..525S)
108 I1 --- w0 Original weight source had for first round of
fibre allocation
110-127 A18 --- File Name of redshift field file containing the
redshift if from 6dFGS (5)
--------------------------------------------------------------------------------
Note (1): ProgID as follows:
1 = 2MASS Ks<12.75
3 = 2MASS H <13.00
4 = 2MASS J <13.75
5 = DENIS J <14.00
6 = DENIS I <14.00
7 = SuperCOSMOS rF<15.60
8 = SuperCOSMOS bJ<16.75
78 = Durham/UKST Galaxy Survey sources
90 = Shapley
109 = Not precised
113 = ROSAT All-Sky Survey
116 = 2MASS AGN
119 = HIPASS (>4sigma)
125 = SUMSS sources
126 = IRAS FSC 6sigma
129 = Hamburg-ESO Survey
130 = NRAO-VLA Sky Survey
999 = orphaned sources
Note (2): SuperCOSMOS star/galaxy classifier as follows:
1 = star
2 = galaxy
3 = unclassifiable
4 = noise
Note (3): Code identifying source of redshift as follows:
0 = no measure
-1 to 68 = reference code of ZCAT (Cat. VII/193)
126 = 6dFGS
392 = 2dFGRS
Note (4): Quality flag as follows:
2 = 6dFGS/2dFGRS, possible, but doubtful, redshift estimate
3 = 6dFGS/2dFGRS, 'probable' redshift (notionally 90% confidence)
4 = 6dFGS/2dFGRS, reliable redshift (notionally 99% confidence)
6 = 6dFGS confirmed Galactic source (not all),
8 = Other sources except ZCAT (not a measure of quality)
9 = ZCAT sources (not a measure of quality)
redshift quality schemes used by 6dFGS and 2dFGRS respectively.)
Note (5):
word "2dFGRS" if from that survey.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: spectra.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- SpecID Unique ID number used to generate GIF image
of spectrum
7- 12 I6 --- TargID ID number in Target table
14- 28 A15 --- TargName Matching name in target table, used to name
FITS files and generate thumbnail images
31- 32 I2 h RAh Observed right ascension (J2000)
33 A1 --- --- [:]
34- 35 I2 min RAm Observed right ascension (J2000)
36 A1 --- --- [:]
37- 41 F5.2 s RAs [0/60] Observed right ascension (J2000)
43 A1 --- DE- Observed Declination sign (J2000)
44- 45 I2 deg DEd Observed Declination (J2000)
46 A1 --- --- [:]
47- 48 I2 arcmin DEm Observed Declination (J2000)
49 A1 --- --- [:]
50- 53 F4.1 arcsec DEs [0/60] Observed Declination (J2000)
56- 70 E15.9 arcsec dr ?=-9.99 Position match error (arcsec)
72- 85 E14.7 --- zraw ?=-9.999 Raw measured redshift
87-100 E14.7 --- z ?=-9.999 Heliocentric redshift
103 I1 --- q_z [0/6] Redshift measurement quality:
4=good to 1=bad (6=star)
109-118 F10.6 --- Rcor ?=-9.99 Cross-correlation peak
122-133 F12.6 s ExpV V reference frame exposure time seconds
136-150 E15.9 d MJD.V MJD of observation in V band
154-165 E12.9 s ExpR R reference frame exposure time seconds
168-182 E15.9 d MJD.R ?=0 MJD of observation in R band
184-212 A29 --- Com Comments on redshift
--------------------------------------------------------------------------------
History:
Copied at http://www.aao.gov.au/local/www/6df/
(End) Patricia Vannier [CDS] 22-Jun-2006