Legacy ETC version P95-phase2 (December 16, 2014)
Provided for reference only

This is not the normal ETC version www.eso.org/observing/etc

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
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	VISIR VIMOS-MOS VIMOS-IFU
Paranal UT4	HAWK-I	SINFONI MUSE
Paranal VISTA	VIRCAM
Paranal VST	OmegaCAM
E-ELT	E-ELT	E-ELT
VLTI	VisCalc

Legacy ETC version P95-phase2 (December 16, 2014)
Provided for reference only

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.

Legacy ETC version P95-phase2 (December 16, 2014) Provided for reference only

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.

Legacy ETC version P95-phase2 (December 16, 2014)
Provided for reference only

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