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MOAO Ensquared Energy for the 5+3 Guidestar Constellation Don Gavel August 18, 2005

MOAO Ensquared Energy for the 5+3 Guidestar Constellation Don Gavel August 18, 2005. AO-corrected PSF for IRMOS. Two FITS files psf_corrected.fits Tomography and fitting PSF – no tip/tilt error 8 LGS (5+3) constellation psf_corrected_25masTipTiltBlurred.fits

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MOAO Ensquared Energy for the 5+3 Guidestar Constellation Don Gavel August 18, 2005

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  1. MOAO Ensquared Energy for the 5+3 Guidestar Constellation Don GavelAugust 18, 2005

  2. AO-corrected PSF for IRMOS • Two FITS files • psf_corrected.fits • Tomography and fitting PSF – no tip/tilt error • 8 LGS (5+3) constellation • psf_corrected_25masTipTiltBlurred.fits • Blurred by convolving with 25mas Gaussian • 25 mas is Richard Clare’s typical value for tip/tilt rms error at 90% sky coverage (either multiple tip/tilt stars or one tip/tilt/focus star) • These are 128x128x3 data cubes • one psf for each of 3 science positions in the 5 arcmin diameter field • scale = 4.256 milliarcsec / pixel • Simulation Parameters: • Cerro Pachon Cn2 profile • r0= 16 cm • Science wavelength = 1.238mm (center of J band) • 90km laser guide star cone beams • Includes Tomographic and DM fitting error for 100 subaps across

  3. 8 Laser Guide Star Constellation Laser guide stars * Science targets + Tip/Tilt stars • 5 LGS at 150 arcsec radius • 3 LGs at 75 arcsec radius • Science evaluation directions at 0, 75, and 150 arcsec

  4. PSF-no tip/tilt error

  5. PSF 25 mas Tip/Tilt Blur

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