Exposition Time Calculator for Imaging

This exposure calculator predicts the signal-to-noise ratio achieved with OIG, DOLORES, NICS for a given exposure time and observing conditions. If sky brightness is not entered, the program uses the default values (new moon for OIG and DOLORES).

To run the program enter values below and click on 'Submit'. You may set signal-to-noise and obtain the corresponding exposure time, or viceversa."

Source Type Binning
Fwhm arcsec Air Mass
Apparent Magnitude mag (mag/arcsec² if extended) Sky Brightness Days from New Moon
Exposure Time seconds Signal To Noise