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The Nearby Supernovae Factory: Monitoring Spectrograph Calibration Lamp

The Nearby Supernovae Factory: Monitoring Spectrograph Calibration Lamp. Ben Dilday Advisor: Rick Kessler, CfCP Physics 335 March 10, 2004. Project Overview. SNFactory Observe low-Z Type Ia supernovae Correlate intrinsic brightness with light curve characteristics

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The Nearby Supernovae Factory: Monitoring Spectrograph Calibration Lamp

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  1. The Nearby Supernovae Factory:Monitoring Spectrograph Calibration Lamp Ben Dilday Advisor: Rick Kessler, CfCP Physics 335 March 10, 2004

  2. Project Overview • SNFactory • Observe low-Z Type Ia supernovae • Correlate intrinsic brightness with light curve characteristics • Reduce statistical error in cosmological parameters

  3. Project Overview • Calibration • Blackbody emission source (lamp at T~3000K) calibrates spectrograph • University of Chicago CfCP Role • instrumentation to confirm stability of blackbody source • Measure red-blue ratio

  4. Physics 335 Project Objectives • Hardware • Construct casing for pin diodes • Remotely controlled roof • Opens to allow light onto PIN diodes • Closes to protect from environment • Instrument installation • Software • Stepper motor (roof) interface • Analysis

  5. Physics 335 Objectives • Casing for pin diodes COMPLETED 16 1/2” x 15 1/2” x 10 1/4” 1/4” garolite on 1/2” aluminum base 1/32” garolite roof on 1/8” garolite frame

  6. Physics 335 Objectives • Remotely controlled roof • 1.8 degree stepper motor • - interfaced via AllMotion EZHR23 stepper motor controller • Previous controller: EZ17 • - coarse step resolution • inadequate

  7. Physics 335 Objectives • Stepper motor (roof) interface COMPLETED Allows remote operation and status checks

  8. Physics 335 Objectives • Instrument Installation INSTALLATION SCHEDULE March 22nd – Hilo Reassemble instrument March 29th – Mauna Kea Install on UH 2.2 meter Mauna Kea Observatories, Hawaii http://www.ifa.hawaii.edu/mko/maunakea.htm

  9. Physics 335 Objectives • Analysis of PIN diode data SOFTWARE In progress SN OBSERVATIONS ~Late Spring ? Gemini, the UH88 inch and UKIRT http://harris.roe.ac.uk/~jkd/startrails.html

  10. Conclusion & Project Outlook • Casing with Roof • COMPLETE • Stepper motor (Remote Operation) • COMPLETE • Installation • Scheduled for end of March • Analysis • PIN diode analysis software likely finished by late April • Application of PIN diode data • Techniques not certain until experiments can be carried out

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