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Charles Townes cleaning mirrors with CO2

Charles Townes cleaning mirrors with CO2. Infrared Spatial Interferometer on Mt. Wilson. Baselines of 4, 8, 12 m. Current configuration is triangular baselines ~35m each. Process of moving telescopes. Baselines of ~30 m. Current system, spectrometer taps A1,A2,A3.

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Charles Townes cleaning mirrors with CO2

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  1. Charles Townes cleaning mirrors with CO2

  2. Infrared Spatial Interferometer on Mt. Wilson Baselines of 4, 8, 12 m. Current configuration is triangular baselines ~35m each

  3. Process of moving telescopes

  4. Baselines of ~30 m

  5. Current system, spectrometer taps A1,A2,A3

  6. Manley, correlator group concept, 4 Aug 08 Channels 42--62 Channels 21--41 ADC ADC ROACH ROACH ADC ADC ROACH Channels 0--20 Process time series to spectra on each Roach. Transfer channels for correlation. ADC ADC ADC 3 GHz BW, 63 channels

  7. Original notion

  8. Visibility, phase and models of Betelgeuse Uniform ellipse model fit to the data. The colors denote different baselines. Uniform disk+hot spot model fit to the data. The grey circle indicates the size of the spot if it has a surface brightness twice that of the star. Visibility and closure phase vs. spatial frequency. SFU is “spatial frequency units” defined as 105 cycles/rad Tatebe et al., ApJ, 670, L21 (2007)

  9. Spectral range covered, lines of interest

  10. O Ceti, uniform disk fits to visibilities on-off line Weiner et al., 2003

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