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A Study of the Lhires III Spectrograph on the Hard Labor Creek Observatory 20 inch Telescope

I present a study done to determine the characteristics of the LHIRES III spectrograph on the 20 inch RC Optics telescope at Hard Labor Creek Observatory. I describe the settings of three different diffraction gratings, collimation and focus issues, and practical aspects of use. The spectrograph was used with a SBIG ST-8XME camera for all studies. Data collection was accomplished with the Maxim DL software package and analysis was completed with IRAF. Solutions for the dispersion relation with all three diffraction gratings were found. Several projects are underway with this instrument. I present time series spectra of α Vir to demonstrate the practical applications of the spectrograph. This non-radially pulsating star shows Doppler shifts that were recorded in the Si III 4552, 4568, 4574 Å triplet over the course of a night. The observed profile variations showed the spectrograph capable of exacting scientific work.

Identiferoai:union.ndltd.org:GEORGIA/oai:digitalarchive.gsu.edu:phy_astr_theses-1012
Date08 August 2011
CreatorsJenkins, Benjamin G
PublisherDigital Archive @ GSU
Source SetsGeorgia State University
Detected LanguageEnglish
Typetext
Formatapplication/pdf
SourcePhysics and Astronomy Theses

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