WARNING!

THE EXPOSURE CALCULATOR IS STILL UNDER DEVELOPMENT!

HET Virus Exposure Time Calculator

Version 1.1

This version uses the "optimistic" throughput measurements and CCD statistics

The calculator can compute the S/N for a given exposure time or the exposure time for a given S/N.

Click on button to change device setting, on device name for HELP.

Input Spectrum

Spectra will be scaled to the following broad band magnitude:
Magnitude: in Bandpass: with Effective Temp (K):
Flux (10-19 ergs/cm2/s/A): at the wavelength of interest given below.

Atmosphere

Sky Brightness : Moon Phase Magnitude (mag/arcsec2):

Seeing (arcsec):

Observations

Wavelength of Interest (Angstroms) :

Please choose to enter either the Exposure Time per dither OR the Desired S/N.

Dither Exposure Time (sec) : Desired S/N :

Matthew Shetrone - shetrone@astro.as.utexas.edu