UKIRT Exposure Time Calculator
Set one of the three parameters below to INDEF or leave it blank to compute its value based on the other input parameters.
Integration time in seconds:
Signal to Noise contributions:
For extended source, the SNR is computed per pixel, and aperture and seeing are ignored.
Please report problems to W.Varricatt (w.varricatt at ukirt.hawaii.edu)
Interface is based on IRAF ccdtime task. Algorithm is based on "IR imaging photometry signal to noise calculations", P. Hirst, March 9, 2005.