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2dFGRS Final Data Release Spectroscopic Catalogues |
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These ASCII catalogues are provided for the convenience of users of the 2dFGRS Final 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 spectrum for each of the 245591 sources in the final data release. Where there is more than one 2dFGRS spectrum for a source, the best spectrum is the one with the highest redshift quality code; if there is more than one spectrum of this quality, then the spectrum with the latest date of observation is used. Each line of best.observations.idz contains the following parameters:
Keyward Format Description
serial I6 Database serial number (=SEQNUM)
spectra I1 Number of spectra obtained
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 F6.3 Final bj magnitude without extinction correction
BJSEL F6.3 Final bj magnitude with extinction correction
BJG_OLD F6.3 Original bj magnitude without extinction correction
BJSELOLD F6.3 Original bj magnitude with extinction correction
GALEXT F5.3 Galactic extinction value
SB_BJ F6.3 SuperCosmos bj magnitude without extinction correction
SR_R F6.3 SuperCosmos R magnitude without extinction correction
z F9.6 Best redshift (observed)
z_helio F9.6 Best redshift (heliocentric)
obsrun A5 Observation run of best spectrum
quality I1 Redshift quality parameter for best spectrum
(quality=1-5; reliable redshifts have quality>=3)
abemma I1 Redshift type (abs=1, emi=2, man=3)
Z_ABS F9.6 Cross-correlation redshift from best spectrum
KBESTR I1 Cross-correlation template from best spectrum
R_CRCOR F5.3 Cross-correlation R value from best spectrum
Z_EMI F9.6 Emission redshift from best spectrum
NMBEST I2 Number of emission lines for Z_EMI from best spectrum
SNR F6.2 Median S/N per pixel from best spectrum
ETA_TYPE F10.6 Eta spectral type parameter from best spectrum (-99.9 if none)
This file contains data for all observations of the 245591 sources in the final data release; all.observations.idz contains 515528 lines with each source having at least two lines in the file, with formats as follows:
Keyword Format Description
Line 1 for each source lists...
serial I6 Database serial number (=SEQNUM)
spectra I1 Number of spectra
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 F6.3 Final bj magnitude without extinction correction
BJSEL F6.3 Final bj magnitude with extinction correction
BJG_OLD F6.3 Original bj magnitude without extinction correction
BJSELOLD F6.3 Original bj magnitude with extinction correction
GALEXT F5.3 Galactic extinction value
SB_BJ F6.3 Supercosmos bj magnitude without extinction correction
SR_R F6.3 Supercosmos R magnitude without extinction correction
best I1 FITS extension number of the best spectrum
z F9.6 Best redshift (observed)
z_helio F9.6 Best redshift (heliocentric)
quality I1 Redshift quality parameter
(quality=1-5; reliable redshifts have quality>=3)
obsrun A5 Observation run of best spectrum
Lines 2..spectra+1 list details of each spectrum...
serial I6 Database serial number (=SEQNUM)
name A10 2dFGRS name (=NAME)
UTDATE A10 UT date of observation
OBSRUN A5 Observation run
Z F9.6 Redshift (observed)
Z_HELIO F9.6 Redshift (heliocentric)
QUALITY I1 Redshift quality parameter
ABEMMA I1 Redshift type (abs=1, emi=2, man=3)
Z_ABS F9.6 Cross-correlation redshift
KBESTR I1 Cross-correlation template
R_CRCOR F5.3 Cross-correlation R value
Z_EMI F9.6 Emission redshift
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 none)
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.
Keyword Format Description
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 F7.5 Redshift (observed); -9.99 if no spectrum
Z_HELIO F7.5 Redshift (heliocentric); -9.99 if no spectrum
bjlim F6.3 2dFGRS bj magnitude limit of this area; -1.000 for
sources not included in the survey sample
QUALITY I1 Redshift quality parameter
(quality=1-5; reliable redshifts have quality>=3)
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 none
GRSDATE A6 Observation date; -99 if none
ETA_TYPE F8.3 Eta spectral type parameter; -99.9 if not determined
PLATE I3 2dF plate number (0 or 1); -99 if none
ECCENT F5.3 Eccentricity
ORIENT F5.1 Orientation
JON I2 Eyeball classification
AREA F6.0 Isophotal area in pixels
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