This file summarizes several instrument specific settings that are related to Magellan/Mage.
There are several issues related to the very short slits of Magellan/Mage (34 pixels or 10" unbinned).
To have enough slit to 'properly' find objects, we restrict the find_trim_edge parameter, i.e.:
par['scienceimage']['find_trim_edge'] = (4,4) # Slit is too short to trim 5,5 especially with 2x binning
For spatial binning, we recommend you to further reduce this by the binning factor.