 Facility |
 Imaging |
 Spectroscopy |
| La Silla | EFOSC2 SUSI WFI SOFI | EFOSC2 HARPS NIRPS FEROS SOFI |
| Paranal UT1 | FORS2 (old ETC) | FORS2 (old ETC) KMOS |
| FORS2 (new ETC) | ||
| Paranal UT2 | VISIR | UVES
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
News and Notes
April 18, 2024
Bug fix in CRIRES and ERIS/NIX APP and SAM modes.
Some default mag and emission line flux values changed.
April 5, 2024
FORS2 is now available in the ETC2.0 framework.
All ETC2.0 instrument ETCs are updated with new features.
Bug fix in CRIRES and ERIS/NIX APP and SAM modes.
Some default mag and emission line flux values changed.
April 5, 2024
FORS2 is now available in the ETC2.0 framework.
All ETC2.0 instrument ETCs are updated with new features.