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2dFGRS 100k Data Release Spectroscopic Catalogues |
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These ASCII catalogues are provided for the convenience of users of
the 2dFGRS 100k Data Release. However it is important to note that the
mSQL database is the definitive
data source, and contains all the information in the ASCII catalogues
and much additional data.
This file contains data for the best spectra for each of the 102426
sources in the 100k data release. Where there is more than one 2dFGRS
spectrum for a source, the `best z' is the redshift with the highest
quality code and most recent date of observation. Each line of
best.observations.idz contains the following parameters:
serial I6 Database serial number (=SEQNUM)
spectra I1 Number of spectra obtained up to 31 Jan 2000
name A10 2dFGRS name (=NAME)
UKST A3 UKST plate (=IFIELD)
ra A11 R.A. B1950
dec A11 Dec. B1950
ra2000 A11 R.A. J2000
dec2000 A11 Dec. J2000
BJG F5.2 Final bj magnitude without extinction correction
BJSEL F5.2 Final bj magnitude with extinction correction
BJG_OLD F5.2 Original bj magnitude without extinction correction
BJSELOLD F5.2 Original bj magnitude with extinction correction
z F9.6 Best z (observed)
z_helio F9.6 Best z (heliocentric)
obsrun A5 Observation run from which best z is obtained
quality I1 Redshift quality parameter
abemma I1 Redshift type (abs=1,emi=2,man=3)
Z_ABS F9.6 Cross-correlation z from best z observation
KBESTR I1 Cross-correlation template from best z observation
R_CRCOR F5.3 Cross-correlation R value from best z observation
Z_EMI F9.6 Emission z from best z observation
NMBEST I2 Number of emission lines for Z_EMI from best z observation
SNR F6.2 Median S/N per pixel from best z observation
ETA_TYPE F10.6 Eta spectral type parameter from best z observation
(-99.9 if not determined)
This file contains data for all observations of the 102426 sources in the 100k data release. As there are 7027 duplicate observations, it comprises 109453 entries for the 102426 sources. Each source has at least two lines in the file, with formats as follows:
Line 1 for each source lists:
serial I6 Database serial number (=SEQNUM)
spectra I1 Number of spectra obtained to 31 Jan 2000
name A10 2dFGRS name (=NAME)
UKST A3 UKST plate (=IFIELD)
ra A11 R.A. B1950
dec A11 Dec. B1950
ra2000 A11 R.A. J2000
dec2000 A11 Dec. J2000
BJG F5.2 Final bj magnitude without extinction correction
BJSEL F5.2 Final bj magnitude with extinction correction
BJG_OLD F5.2 Original bj magnitude without extinction correction
BJSELOLD F5.2 Original bj magnitude with extinction correction
best_spec I1 FITS extension number of the best spectrum for this
source (this parameter is not held in the FITS file
or the mSQL database)
z F9.6 Best z (observed)
z_helio F9.6 Best z (heliocentric)
quality I1 Redshift quality parameter
obsrun A5 Observation run from which best z is obtained
Lines 2..spectra+1 list details of each of the `spectra' observations:
serial I6 Database serial number (=SEQNUM)
name A10 2dFGRS name (=NAME)
UTDATE A10 UT date of observation
OBSRUN A5 Observation run
Z F9.6 z (observed)
Z_HELIO F9.6 z (heliocentric)
QUALITY I1 Redshift quality parameter
ABEMMA I1 Redshift type (abs=1,emi=2,man=3)
Z_ABS F9.6 Cross-correlation z
KBESTR I1 Cross-correlation template
R_CRCOR F5.3 Cross-correlation R value
Z_EMI F9.6 Emission z
NMBEST I2 Number of emission lines for Z_EMI
SNR F6.2 Median S/N per pixel
ETA_TYPE F10.6 Eta spectral type parameter (-99.9 if not determined)
3. parent.reg.txt These files (reg=ngp/sgp/ran/2dF) contain details of all observations of sources in each of the NGP, SGP and RAN regions, and the whole survey, up to the 100k data release cut-off date of 31 Jan 2000. parent.ngp.txt: contains 168406 entries for all 166124 2dFGRS NGP sources, although only 42326 entries (40044 sources + 2282 repeats) have spectral information. parent.sgp.txt: contains 248513 entries for all 244071 2dFGRS SGP sources, although only 53422 entries (48980 sources + 4442 repeats) have spectral information. parent.ran.txt: contains 57322 entries for all 57019 2dFGRS random field sources, although only 13705 entries (13402 sources + 303 repeats) have spectral information. parent.2dF.txt: contains 474241 entries for all 467214 2dFGRS sources in all survey regions, although only 109453 entries (102426 sources + 7027 repeats) have spectral information.
serial I6 Database serial number (=SEQNUM)
alpha F16.13 R.A. B1950 in radians (=RA)
delta F16.13 Dec. B1950 in radians (=DEC)
BJSEL F5.2 Final bj magnitude with extinction correction
Z_HELIO F7.5 z (heliocentric); -9.99 if no spectrum
Z F7.5 z (observed); -9.99 if no spectrum
bjlim F6.3 2dFGRS bj magnitude limit of this area; -1.000 for
sources not included in survey sample
QUALITY I1 Redshift quality parameter
BJG F5.2 Final bj magnitude without extinction correction
BJSELOLD F5.2 Original bj magnitude with extinction correction
BJG_OLD F5.2 Original bj magnitude without extinction correction
UKST A3 UKST plate (=IFIELD)
obsfld I3 Observed field number (=OBSFLD(4:6)); -99 if no observation
GRSDATE A6 Observation date; -99 if no observation
ETA_TYPE F8.3 Eta spectral type parameter; -99.9 if not determined
PLATE I3 2dF plate number (0 or 1); -99 if no observation
ECCENT F5.3 Eccentricity
ORIENT F5.1 Orientation
JON I2 Eyeball classification
AREA F6.0 Isophotal area in pixels
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