1	BACKYARD SPECTROSCOPY By Keith Schlottman Presented to TAAA 11/3/06
2	The Spectrum Tells A Story Stars Stellar classifications / HR Diagram Age of star Surface gravity Pressure Surface temperature Radial velocity Identify spectroscopic binaries Other Objects Galactic and Quasar redshifts Nebular compositions Comets and Planets
3	Equipment More Expensive SBIG SGS LHIRES Sivo Scientific Nu-View II Moderately Expensive SBIG DSS-7 Less Expensive DG Spectrum Filters Rainbow Optics Star Analyser Build Your Own
4	Acquiring Data With the SGS Use CCDSoft Guide on Slit Binning 1x4 Note that images are monochrome!
5	Processing Data Dark Subtract, Median Combine (CCDStack) Rotate if Low-Res Mode (IRIS) Wavelength Calibration (vSpec) Flux Calibration for CCD Response (equivalent to Flat Field)
6	Wavelength Calibration - H Edmund Scientific Lamps are used
7	Wavelength Calibration - Hg
8	Spectral Types
9	Identifying Stellar Composition
10	Emission Nebulae
11	DG Spectrum Filter Zero and First Order on Main Chip Vega Use Known Lines to Calibrate in vSpec
12	Comparison of DG to SGS DG Spectrum Filter Advantages – Low cost, Not dependent on CCD response, simpler to use Disadvantages – Low resolution SGS Advantages – Higher resolution, Self guides Disadvantages – Expensive, Slit means less light in results (thus longer exposures)
13	The Easiest Spectrum to Observe – No Equipment Necessary!