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This version of the imaging ETC assumes that you do not care about S/N
and that you only want to be sure to detect more than a given percentage
of the objects. The typical use of this ETC is therefore for estimating an exposure time to be sure
to detect transients in imaging, before putting them into the slit.
Estimated exposure times below 60sec have been set to 60sec as we do we do not recommend
to expose for less than 1 minute, except for very bright objects.
Estimated exposure times above 7200sec are probably unphysical.
Results will be for mean moon conditions.
We give in the following the parameter ranges we tested. Values outside
of these ranges will give a predicted exposure time (except for unphysical
airmasses), but we suggest to carefully look at the 3D plots, as this exposure
time may be affected by model divergences.
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OHP seeing is typically varying between 1arcsec (not very often),
and 5arcsec, with a median value close to 2.5arcsec.
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Object (modeled by a gaussian) apparent fwhm (arcsec).
Only used if extended object
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Gives the Air Mass (>1). Values above 2 are in unexplored domains, exposure times may
be wrong (and telescope broken...).
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Targetted magnitude (in the required band, AB system). This version of the ETC tested values between 19 and 25,
depending on the magnitude band you have chosen.
Values larger than 25 are too faint for T193/MISTRAL and exposure time are in unexplored
domains, so may be wrong.Values larger than 23 are in unexplored domains, so may be wrong.
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Detection percentage you want to reach (between 50 and 90%). If <50%, unsafe,
high probablility to miss the object. If >90%, unexplored domain. The code will
not generate a predicted exposure time.
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