This preliminary exposure time calculator for REM instruments. For any questions, please write to
dino.fugazza @ brera.inaf.it.
The software uses an aperture radius of 3 arcsec (ROS2 0.59"/px while REMIR 1.22 "/px) to compute the S/N.
All filters S/N or exposure (DIT) are computed. For REMIR you can include the filter H2 and/or Z in the process.
At this moment we assume a point source, next version we include also the extended source.
The maximum exposure time for ROS2 is 300 sec, for REMIR the maximum suggested DIT is 60 sec for J, 30 sec for H, 15 sec. for K and 90 sec for Z and H2.