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SPECTROSCOPY
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INTRODUCTION |
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IF YOU ARE NEW TO SPECTROSCOPY THEN YOU MIGHT FIND THIS PRESENTATION OF INTEREST It was part of a British Astronomical Association Variable Star Section Workshop and covers the equipment I use for low and high resolution spectroscopy and describes how spectra are converted into scientific data. It also includes some useful links |
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IF YOU HAVE A DIGITAL SLR CAMERA THEN THIS SIMPLE TECHNIQUE USED TO TAKE SPECTRA OF BRIGHT STARS MIGHT BE OF INTEREST |
THE STAR ANALYSER - A SIMPLE LOW RESOLUTION SPECTROGRAPH
I first started experimenting with spectroscopy in late 2002 using a 100 lines/mm transmission grating bought from the educational supplies company Jeulin in France, which I came across on Christain Buil's website here http://astrosurf.com/buil/us/spe1/spectro3.htm It was mounted in a 50x50mm glass slide and, unusually for an inexpensive grating, it was blazed which increased the efficiency (most of the light is diffracted into one of the first order spectra.)
In late 2004, I eventually traced the manufacture of this grating to Paton
Hawksley in the
I never cease to be amazed at what can be done with such simple equipment, such as identifying supernovae types, detecting molecules in comets and measuring the redshift of Quasars.
**UPDATE MAY 2006**
THE LHIRES
III - A HIGH RESOLUTION
SPECTROGRAPH
I now also have a high resolution (R=17000) capability for bright objects, thanks to an LHIRES III spectrograph purchased as a kit from the French AUDE amateur astronomy group. See here for more details