 Facility |
 Imaging |
 Spectroscopy |
| La Silla | EFOSC2 SUSI WFI | EFOSC2 HARPS NIRPS |
| Paranal UT1 | FORS2 (old ETC) | FORS2 (old ETC) KMOS |
| FORS2 (new ETC) | ||
| Paranal UT2 | VISIR | UVES (new ETC)
UVES (old ETC)
UVES-FLAMES
GIRAFFE VISIR |
| Paranal UT3 | SPHERE-IRDIS SPHERE-ZIMPOL | X-SHOOTER
SPHERE-IFS
CRIRES |
| Paranal UT4 | HAWK-I | MUSE |
| ERIS | ||
| Paranal ICCF | ESPRESSO | |
| Paranal VLTI | GRAVITY MATISSE VisCalc CalVin | |
| Paranal VISTA | VIRCAM | 4MOST |
| Paranal VST | OmegaCAM | |
| ELT | ELT imaging | ELT spectroscopy |
ESO Exposure Time Calculators
Documentation and Tools
- Support: https://support.eso.org
- Frequently Asked Questions
- Formula Book
- Database of efficiency profiles
- Deprecated ETCs
- SkyCalc Sky Model Calculator
- with advanced Almanac
- command-line interface skycalc_cli