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Ohio State InfraRed Imager/Spectrometer

OSIRIS Documentation

OSIRIS slit PA restrictions

The OSIRIS slit is aligned perpendicular to the instrument rotator PA. i.e., when the rotator is
at a PA of 0 deg, the slit is at 90 deg. The slit PA is changed by rotating the whole instrument.
OSIRIS cannot be rotated to any arbitrary PA at a given time for a given target, for reasons to
do with liquid nitrogen spillage.

A Lab View Remote Panel web-tool will let you figure out which PAs are accessible on sky for your run. You can access the tool at this web site.

http://soarlog.ctio.noao.edu:5300/Server.html
You will need a Lab View run-time engine installed on your machine. Go here to download the engine.
http://www.ctio.noao.edu/ftp/pub/omar/

Right-click to assume control of the VI tool and do so again to relinquish control when you're done.

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The Southern Astrophysical Research (SOAR) Telescope is a 4.1 meter aperture telescope designed to produce the best quality images of any observatory in its class in the world. It was funded by a a partnership between the U.S. National Optical Astronomy Observatory (NOAO), the country of Brazil, Michigan State University (MSU) and the University of North Carolina at Chapel Hill (UNC). SOAR is situated on Cerro Pachón at an altitude of 2,700 meters (8,775 feet) above sea level, at the western edge of the peaks of the Chilean Andes.