ROSIE-IFU is an image-slicing IFU module for the IMACS spectrograph.  
Using the f/2 camera, the unit provides 42 (0.6 x 52 arcsec) slices 
covering a 26 x 52 arcsec field of view.  The unit hasn't been tried yet 
at f/4, but with the f/4 camera the IFU should provide higher wavelength 
resolutions using 30 slices with gaps that can be interpolated by taking 
data at two positions.  With either camera the wavelength coverage must be 
limited to a dispersed length equivalent to 6 arcmin using a 50 mm filter 
placed in front of the IFU.  ROSIE-IFU will be offered for use on a 
shared-risk basis in 2025A, in collaboration with instrument PI Steve 
Shectman.  Interested observers should contact him at
shec@carnegiescience.edu for further details before submitting a proposal.