This tool calculates the expected signal to noise for a point source
using the KAST spectrograph. Currently, the user can only select two
grisms, two dichroics and one grating. As more data on the throughput
of the instrument become available, more options will be added.
The input spectrum is one of the templates normalized by the
specified AB magnitude in the specified filter. The total flux of
the object specified by the user will be reduced to account for slit
losses based on the specified slit width, height, and seeing. The
target is assumed to be a point source with a PSF FWHM as specified
by the seeing parameter. For KAST the slit is 120 arcseconds in
length.
The output data are given in units of per resolution element.