The progress achieved in implementing Point Spread Function reconstruction (PSF-R) capability at W. M. Keck Observatory (WMKO) is discussed. Observations of low-mass binary systems have been used to evaluate the improvements in astrometry and photometry using reconstructed PSFs. The on-sky performance of PSF-R is discussed by comparing the binary-fitting analysis using the reconstructed PSFs with the standard methods. We show that the PSFR in the NGS provides comparable performance to having a close reference star in the imaging science instrument. The on-sky troubleshooting efforts and the recent PSF-R technical developments are also presented. We find that the PSF-R reconstruction is more of a systems science problem that a post-processing problem. We close by discussing the lessons learned in the context of existing and future extremely large telescopes.
S. Ragland, T. J. Dupuy, L. Jolissaint, P. L. Wizinowich, J. R. Lu, M. A. van Dam, G. B. Berriman, W. Best, C. R. Gelino, A. M. Ghez, M. C. Liu, J. A. Mader, A. Vayner, G. Witzel, and S. A. Wright, "Status of point spread function determination for Keck adaptive optics," Proc. SPIE 10703, Adaptive Optics Systems VI, 107031J (Presented at SPIE Astronomical Telescopes + Instrumentation: June 13, 2018; Published: 10 July 2018); https://doi.org/10.1117/12.2312975.
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