Transmission Grating Spectrometers in Undergraduate Astronomy Laboratories

Details Transmission Grating Spectrometers in Undergraduate Astronomy Laboratories Transmission Grating Spectrometers in Undergraduate Astronomy Laboratories

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21942202h&link_type=abstract

American Astronomical Society, AAS Meeting #219, #422.02

Physics

Optics

Scientific paper

The Iowa Robotic Telescope, located in southern Arizona, has been used in University of Iowa undergraduate laboratories for more than a decade. The addition of a low-resolution transmission grating spectrometer (TGS) to the 0.37 m classical Cassegrain reflector has allowed students to obtain spectra of stars, planets, and nebulae as regular part of the lab curriculum. We discuss the relative efficiency and resolution dependences using different groove spacings, slits, telescope optics, and camera sensor geometries. In addition, we consider the use of beam steering prisms joined with diffraction gratings (grisms). Students may schedule the TGS system using a simple web-based form to observe targets down to approximately 10th magnitude. Some of the TGS observational targets include Wolf-Rayet stars with optically thick winds, novae, as well as main sequence stars over the entire spectral sequence.

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