lists current estimates of the detection limits for slitless spectroscopy with the UVIS and IR modes. The numbers in the table are the V
magnitudes of point sources for which a 1-hour exposure yields a spectrum with a S/N of 5 per resolution element, with extraction boxes of 1×
5 and 1×
3 pixels for the UVIS and IR, respectively. V
magnitudes are given for three different assumed source spectral types.
For more detailed simulations of WFC3 slitless data, a simulator is available that
can generate 2D images (dispersed as well as direct) of synthetic target fields. The simulator package, aXeSIM, is available via a Web interface (reduced functionality) and as a stand-alone IRAF package (full functionality). For further information, see: