CCD Spectroscopy Team Members: Resident Astronomer:Dr. Aloha Telescope Technician: Kurt Woolslayer Instrumentation Specialist: Clyde Kobashigawa

Equipment Needed 1. CCD Camera: SBIG ST-7E $4K 2. Self guided Spectrograph:SBIG $4K 3. Telescope: 10”Meade LX50 $2.5K 4. Lap top PC: $1.5K 5. Help from colleagues $ priceless $

CCD Camera coupled to Spectrograph

Diffraction grating Micrometer: used to scan up and down the spectrum

Ray diagram of the optical system 1.Top Path:Imaging CCD 2. Right path:Guiding CCD

Telescope Setting and alignment 1. Setup wedge/tripod at 20 degrees. 2. Align finder scope with the optical tube. 3. Polar alignment 4. Find target object with eyepiece. 5. Remove eyepiece and focus with focuser attachment. 6. Attach Spectrograph/CCD/computer cables 7. Power up computer/CCD/begin cool down sequence. 8. Align slit,find target, focus target, and move target onto the slit. 9. Grab and save bracketed images. 10. Warm-up and Power down equipment.

Exposures were captured at different angles to the diffraction grating to record the entire visual spectra: 400 mm 450 mm 500 mm 550 mm 600 mm

Spectra of Mars

Spectra of Antares

Spectra of Spica

Spectra of Mars

Spectra of Antares

Data reduction 1. Crop Spectra in CCD Software (CCDOPS) 2. Open target spectral data in spectral analysis software (Spectra) 3. Open comparison spectral data and calibrate absorption lines and emission lines. 4. Analyzed target data can be used to determine the targets A. Radial Velocities from Doppler shifts B. Composition from absorption lines C. Temperature from peak emissions and absorptions D. Spectral class of target

CCDOPS Software with data collected from Antares 6/26/01

Antares raw spectra

Cropped Antares Spectra

So What? Star Temperature by Spectral Classification Star Composition by Which Lines are Present Star Motion by Looking at Doppler Shifted Lines

Confirmation of planetary wobble by Tau Boo

Happy Starry Rainbows !!!!!!!!!