Subaru Imaging Exposure Time Calculator

  1. You must have JavaScript enabled.
  2. This ETC assumes that noise arises solely from photon shot noise and detector properties. Additional sources of noise, such as poor flatfielding, incorrect sky determination, and confusion, will result in worse sensitivity than this tool suggests.

Instrument: =
Point source Seeing: (use circular aperture of given diameter)
Extended source (magnitude is per square arcsecond; use square aperture)
days from new moon Aperture = arcseconds

for S/N ratio =
for exposure time = seconds
Require at least exposures

last update : FN, 5 August 2010

Copyright © 2000-2003 Subaru Telescope, NAOJ. All rights reserved.