Charles Townes cleaning mirrors with CO2. Infrared Spatial Interferometer on Mt. Wilson Baselines of 4, 8, 12 m. Current configuration is triangular baselines.

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Presentation transcript:

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

Manley, correlator group concept, 4 Aug 08 ADC ROACH Channels Channels Channels Process time series to spectra on each Roach. Transfer channels for correlation. 3 GHz BW, 63 channels

Original notion

Visibility, phase and models of Betelgeuse Visibility and closure phase vs. spatial frequency. SFU is “spatial frequency units” defined as 10 5 cycles/rad 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. Tatebe et al., ApJ, 670, L21 (2007)

Spectral range covered, lines of interest

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

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