GamaCoreExtra_v1.fits (version June 24, 2010) contains extra non main r-band survey redshifts.

15821 x 33

Derived from GamCoreMainSurvey_v1.

The number of rows are given by the logic:

SURVEY_CLASS < 6 & Z_QUALITY>=3 using GamaTiling_v1.

Redshifts that are available but not being released are denoted Z_HELIO= -2. Briefly the Extra redshift release selection is:

Z_SOURCE != 5 (i.e. the redshifts source must be non-GAMA).

This results in 458 redshifts being released. See Driver et al. 2010 for discussion of the data release selection.

For details of the SURVEY_CLASS see IC paper http://adsabs.harvard.edu/abs/2010MNRAS.404...86B

The redshifts are obtained by matching to SpecCatalogsv06.  Matches are within
1 arcsec except for a few cases.  The spectrum with highest Q value is used in
case of multiple matches.  In case of equal Q, the spectrum with the highest
value of PROB - DIST is used (where DIST is the matching distance in arcsec
with a minimum of 0.1 arcsec).