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6dFGSzDR3.txt.gz | 5.5Mb |
The 6dF Galaxy Survey Redshift Catalogue Data Release 3 (final) catalogue file
Basic data for the galaxies in the 6dFGS with redshifts,
using the best 6dFGS redshfits (Q=3 or 4) plus availalbe redshifts
from SDSS, 2dFGRS and ZCAT (124647 entries in all).
# Col. Description (new parameters for DR3 indicated by *)
# 1 Galaxy survey target ID
# 2,3,4 R.A. (J2000): hrs, min, sec
# 5,6,7 Dec. (J2000): deg, min, sec
# 8* Number of 6dFGS measurements (of any redshift Q value)
# 9* Number of measurements used in final cz (Q=3 or 4 only)
# 10 Recalibrated b_J magnitude (BMAG in 6dFGS database)
# 11 Programme ID number (PROGID in database)
# 12 Recalibrated r_F magnitude (RMAG in database)
# 13 SuperCOSMOS star/galaxy classifier, where
# 1=galaxy, 2=star, 3=unclassifiable, 4=noise
# 14* Sum of comparison flags (comparison threshold = 330km/s);
# individual flag codes are:
# 0 : sole measurement or agreement within threshold
# 1 : >=1 6dFGS-6dFGS disagreement (median cz listed)
# 2 : >=1 6dFGS-ZCAT disagreement (6dFGS cz listed)
# 4 : >=1 6dFGS-2dFGRS disagreement (6dFGS cz listed)
# 8 : >=1 6dFGS-SDSS disagreement (6dFGS cz listed)
# 16 : >=1 6dFGS-ZCAT agreement (6dFGS cz listed)
# 32 : >=1 6dFGS-2dFGRS agreement (6dFGS cz listed)
# 64 : >=1 6dFGS-SDSS agreement (6dFGS cz listed)
# 6dFGS cz values (Q=3,4) are listed in all cases in preference
# to the external value for redshift. ZCAT/2dFGRS/SDSS values are
# listed when no Q=3,4 6dFGS cz is available. Note that in the
# case of three or more 6dFGS measurements, just because one pair
# of 6dFGS measurements disagree, the redshift may in fact be
# secure through the remaining measurements. This can be checked
# against items 8 and 9.
# 15 Best available combined recession velocity cz (km/s)
# 16 Combined uncertainty in cz (km/s), obtained by error-weighting
# individual redshifts, where Q=3 redshifts have uncertainty
# 55km/s and Q=4 have 45km/s. 6dFGS redshifts deemed unsuitable
# for extragalactic use (either because of measurement
# uncertainty or spectral classification) have had their
# uncertainties set to 0km/s. SDSS redshifts have an uncertainty
# of 30km/s (Abazajian et al. 2005, ApJ 129, 1755). 2dFGRS
# redshifts have uncertainties of 123km/s or 89km/s for redshift
# Q=3 or Q=4 respectively (Colless et al. 2001, MNRAS, 328, 1039
# and col.18 below). ZCAT redshifts carry the uncertainties from
# their original surveys and so vary.
# 17 Code identifying source of redshift: 0=no (or unreliable 6dFGS)
# measure, 1...99=ZCAT, 126=6dFGS, 250=SDSS, 392=2dFGRS
# 18 Best redshift quality value available for this source:
# 0=no redshift quality value available, 1...4=6dFGS or 2dFGRS
# quality parameter, 6=6dFGS confirmed Galactic source, 9=SDSS
# and ZCAT sources (not a measure of quality); see Jones et al.
# 2004, MNRAS, 355, 747 or Colless et al. 2001, MNRAS, 328, 1039
# for details on the quality schemes used by 6dFGS and 2dFGRS
# respectively).
# 19,20 Galactic latitude, Galactic longitude
# 21 A_V, Galactic extinction in V magnitudes (from
# Schlegel, Finkbeiner & Davis 1998, ApJ 500, 525)
# 22 Original weight source had for first round of fibre allocation
# 23* TARGETID number from the 6dFGS database
# 24 Template code(s): 6dFGS template number, Z for ZCAT redshift,
# T for 2dFGRS, S for SDSS, and N for no redshift.
# 25 Name of redshift field file containing the redshift if sourced
# from 6dFGS; or the words 2dFGRS, ZCAT, or SDSS if the redshift
# is from those surveys; otherwise "not_available" if the field
# information is not available, for whatever reason.
# 26* SPECID values of redshifts contributing to the final combined
# redshift.
#
# Heath Jones, Anglo-Australian Observatory, 28 February 2009
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Spectra
table | 3.8Mb | a comma-separated
file the table of spectral observations, a subset of parameters is provided i.e.
SPECID, TARGETID, TARGETNAME, OBSRA, OBSDEC, MATCH_DR, Z, Z_HELIO,
QUALITY, R_CRCOR, EXP_V, MJDOBS_V, EXP_R, MJDOBS_R,
Z_COMM. Decriptions of these attributes can be found in the
schema page for the Spectra table. |
