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| Paper: |
Photometric Calibration and DAs in the SDSS |
| Volume: |
372, 15th European Workshop on White Dwarfs |
| Page: |
289 |
| Authors: |
Engelbrecht, A.; Koester, D. |
| Abstract: |
We determine zero-points for the theoretical calculation of SDSS ugriz magnitudes. A two-color diagram u−g vs. g−r is then used to show that the average surface gravity of DA white dwarfs in the SDSS data release 4 does not increase below 12000 K, if determined from photometry instead of spectra. |
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