ESO Exposure Time Calculators

Exposure Time Calculators (ETCs) give astronomers the ability to predict the signal to noise ratio - or conversely, the exposure time to achieve it - under a set of assumptions about the performance of an instrument and the observing conditions.

Documentation and Tools

Frequently Asked Questions
Formula Book for signal and noise estimates
Characteristic curves for the various optical components
Retired Exposure Time Calculators
SkyCalc Sky Model Calculator web application

ESO Exposure Time Calculators

	Imaging	Spectroscopy
La Silla	EFOSC2 SUSI 2p2 WFI SOFI	EFOSC2 HARPS FEROS SOFI
Paranal UT1	NACO FORS2	NACO FORS2 KMOS CRIRES
Paranal UT2		UVES UVES-FLAMES GIRAFFE X-SHOOTER
Paranal UT3	VISIR VIMOS SPHERE-IRDIS SPHERE-ZIMPOL	VISIR SPHERE-IFS VIMOS-MOS VIMOS-IFU
Paranal UT4	HAWK-I	SINFONI MUSE
Paranal VISTA	VIRCAM
Paranal VST	OmegaCAM
E-ELT	E-ELT	E-ELT
VLTI	VisCalc CalVin

ESO Exposure Time Calculators

Documentation and Tools

News - October 2 2014

The SPHERE ETCs have been updated to version 5.1.0 with a bug fix.
For details, please visit the SPHERE News Page.

ESO Exposure Time Calculators

Documentation and Tools

News - October 2 2014

The SPHERE ETCs have been updated to version 5.1.0 with a bug fix. For details, please visit the SPHERE News Page.

The SPHERE ETCs have been updated to version 5.1.0 with a bug fix.
For details, please visit the SPHERE News Page.