This tool calculates the expected counts and signal to noise for
a point source using the DEIMOS spectrograph. Currently, the user
can only select three gratings at a fixed number of tilts. As more
data on the throughput of the instrument become available, more
options will be added. The throughput measurements come from the
data on the DEIMOS web pages at Keck Observatory
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 DEIMOS the slit is assumed to be 10
arcseconds in length.
The output data are given in units of per pixel.