OSIRIS SNR Calculator free download, OSIRIS SNR Calculator download on software download

A free astronomy calculator for your Mac The OSIRIS SNR Calculator is a free and easy to use tool that covers the main observing modes of the OSIRIS instrument. These are: broad-band imaging, spectroscopy and tunable filter (TF) imaging. This tool estimates signal-to-noise ratios for a given exposure time. For all calculation modes you must choose the following:· Focal station (Nasmyth or Cassegrain)· CCD readout mode· Binning · Type of source (point-like or extended)· Airmass· Seeing FWHM (arcsec)· Moon (bright, grey or dark)· Fraction of flux (if source type is point-like) in %· Number of exposures· Exposure time for a single exposure (s)Some further info on how to use the OSIRIS SNR Calculator is available HERE. Requirements: · Java 1.6 or later What's New in This Release: · Real red TF behaviour implemented · Real CCD parameters updated (gain, readout noise, readout time, and pixelsize) · Red Order Sorter filters efficiencies updated · Some bugs fixed · Signal and noise are given in ADUs

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