Lawn SPECTROSCOPY

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Slide 1

Beginner SPECTROSCOPY By Keith Schlottman Presented at Texas Star Party 05/16/07

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Have You Ever Used Spectroscopy? Utilized a Nebula Filter? Seen that Vega is Bluish and Arcturus is Reddish? Seen a Rainbow? Seen the Sun in H-Alpha?

Slide 3

The Spectrum Tells A Story Stars Stellar groupings/HR Diagram Age of star Surface gravity Pressure Surface temperature Radial speed Identify spectroscopic doubles Other Objects Galactic and Quasar redshifts Nebular structures Comets and Planets

Slide 4

Equipment – Visual Spectroscopy Prism CD-ROM Project Star Spectrometer Naked Eye (Rainbows & Moonbows)

Slide 5

Equipment – Telescopic Spectrographs More Expensive SBIG SGS LHIRES III Baader DADOS Sivo Scientific Nu-View II Moderately Expensive SBIG DSS-7 Less Expensive DG Spectrum Filters Rainbow Optics Star Spectroscopes Rigel Systems RS-Spectroscope Paton Hawksley Star Analyser Build Your Own

Slide 6

Comparison of 4 Spectrographs Information in light of my experience and maker cases, may not be 100% exact

Slide 7

Acquiring Data With the SGS Use CCDSoft Guide on Slit Binning 1x4 Note that pictures are monochrome!

Slide 8

Processing Data Dark Subtract, Median Combine (CCDStack) Rotate if Low-Res Mode (IRIS) Wavelength Calibration (vSpec) Flux Calibration for CCD Response (identical to Flat Field)

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Wavelength Calibration - H Edmund Scientific Lamps are utilized

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Spectral Types Spectra brought with The SBIG SGS on a 12" LX-200GPS from my Tucson patio on October 16 & 17, 2006. BLUE RED

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Identifying Stellar Composition

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Emission Nebula The OIII emanation lines were thought to be another component in the mid 20 th century, "Nebulium".

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Emission Nebulae

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Planets

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Comets

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Novae

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Variable Stars

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Pro-Am Collaborations Amateur spectroscopists were requested that get information on this star, which was an objective for the COROT satellite.

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Be Stars

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Young Stars

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T Tauri An extremely youthful star, as yet experiencing withdrawal.

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Texas Star Party 2007 This information was gotten early Monday morning at TSP Upper Field. Blueshifted assimilation highlight gives a premise to ascertaining spiral speed of the growing shell. Preparatory figuring from this information is ~ 200 km/sec.

Slide 23

DG Spectrum Filter Zero and First Order on Main Chip Vega Use Known Lines to Calibrate in vSpec

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The Easiest Spectrum to Observe – No Equipment Necessary! For more data see: http://www.xanaduobservatory.com

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