English (UK)
Filters
A filter is needed for each of the four CCDs. Overall, 124 filters have been built for LAICA, both with a wide and medium wavelength range coverage:
11 wide-band filters (left table, see transmission curves of Johnson- and Sloan filters) and 20 medium-band filters (right figure: colored bands overlayed over SDSS bands in black, full optics + atmospheric transmission) designed for the ALHAMBRA cosmological survey.
| Band name | λcentral | λFWHM | Trans. |
|
U_Johnson |
3500 | 520 | Curve |
| B_Johnson | 4200 | 1400 | Curve |
| V_Johnson | 5500 | 1150 | Curve |
| R_Johnson | 6600 | 1850 | Curve |
| I_Johnson | 9000 | 100 | Curve |
| B2 | 4300 | 1480 | Curve |
| u' SDSS | 3500 | 630 | Curve |
| g' SDSS | 4900 | 1230 | Curve |
| r' SDSS | 6200 | 1350 | Curve |
| i' SDSS | 7700 | 1500 | Curve |
| z' SDSS | 9200 | 1600 |
