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Note that this at the moment only provides stellar masses for a subset of the galaxies in the survey - a complete sample will be provided in a future release.
Update: The mass lookup file was incorrect and was updated 27/09/05. The correct file has 395265 lines
This catalogue contains a table of derived parameters following Kauffmann et al 2003, MNRAS, 341, 33 "Stellar Masses and Star Formation Histories for 10^5 galaxies from the SDSS" If you want to use the stellar masses, please use the median dust-corrected MASS (rml50) in these files. If you want to use any of the other parameters, I would advise you to read the above methods paper carefully and if in doubt, email gamk@mpa-garching.mpg.de.
Download the catalogue here
and the accompanying text description (for DR2, but the format hasn't changed) here
There is also a file mass_lookup.list_dr4 which contains the index of each galaxy in the stellar mass file in the full files discussed in more detail here.
| What | Units | |
|---|---|---|
| Column 1 | Plate ID | |
| Column 2 | Mean Julian Date | |
| Column 3 | Fiber ID | |
| Column 4 | k-corrected z-band absolute magnitude (k-corrections to z=0.1 assuming standard cosmology) see this for more on the k-corrections | AB magnitudes at z=0.1 |
| Column 5 | Redshift | |
| Column 6 | D_n4000 (corrected for [Ne III] contamination) | |
| Column 7 | Hdelta_A, emission corrected | Ångström |
| Column 8 | Log Min chisq stellar mass without dust correction | Solar masses |
| Column 9 | Log dust-corrected stellar mass (median of probability distribution) | Solar masses |
| Column 10 | Log dust-corrected mass (lower 2.5 percentile of probability distribution) | Solar masses |
| Column 11 | as above, 16th percentile of prob distr. | Solar masses |
| Column 12 | as above, 84th percentile of prob distr. | |
| Column 13 | as above, 97.5th percentile of prob distr. | |
| Column 14, 15, 16 | Median, 2.5 and 97.5 percentiles of the z-band log(M/L) (dust-corrected) | |
| Column 17, 18, 19 | Median, 16 and 84 percentiles estimates of the z-band extinction | Magnitudes |
| Column 20, 21, 22 | Median, 16 and 84 percentiles estimates of the r-band weighted mean stellar age | Gyr |
| Column 23, 24, 25 | Median, 2.5 and 97.5 percentiles estimates of F_burst - the fraction of the stellar mass formed in a burst in the past 2 Gyr. |
The following Fortran statement was used to write the file
write(39,6)idpl, mjd, ifib,
+ rz,zz, d4n, hda,
+ best,rml50,rml025,rml16,
+ rml84,rml975,rmz50,rmz025,rmz975,d50,d16,d84,
+ h50,h16,h84,f50,f025,f975
6 format(1x, 3i6,25(f9.4))
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