Temporal optical behavior of HST: focus, coma, and astigmatism history

Matthew D. Lallo; Russell B. Makidon; Stefano Casertano; John E. Krist

doi:10.1117/12.672040

30 June 2006 Temporal optical behavior of HST: focus, coma, and astigmatism history

Matthew D. Lallo, Russell B. Makidon, Stefano Casertano, John E. Krist

Proceedings Volume 6270, Observatory Operations: Strategies, Processes, and Systems; 62701N (2006) https://doi.org/10.1117/12.672040
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

The focus of the Hubble Space Telescope (HST) has been monitored throughout the life of the observatory primarily by phase retrieval techniques. This method generates and fits model Point Spread Functions (PSFs) to nearly in-focus stellar images to solve for coefficients of the Zernike polynomials describing focus, and often coma and astigmatism. Here, we discuss what these data from the ongoing monitoring strategies and special observations tell us about modes and timescales observed in HST optical variations.

Citation Download Citation

Matthew D. Lallo, Russell B. Makidon, Stefano Casertano, and John E. Krist "Temporal optical behavior of HST: focus, coma, and astigmatism history", Proc. SPIE 6270, Observatory Operations: Strategies, Processes, and Systems, 62701N (30 June 2006); https://doi.org/10.1117/12.672040

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