On-sky demonstration of optical speckle stabilization using the SPIFS-POC

Mark Keremedjiev; Stephen S. Eikenberry; Joseph C. Carson

doi:10.1117/12.856002

15 July 2010 On-sky demonstration of optical speckle stabilization using the SPIFS-POC

Mark Keremedjiev, Stephen S. Eikenberry, Joseph C. Carson

Proceedings Volume 7735, Ground-based and Airborne Instrumentation for Astronomy III; 77351S (2010) https://doi.org/10.1117/12.856002
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

We present on-sky performance results of a new technique, speckle stabilization, with the Stabilized sPeckle Integral Field Spectrograph Proof-Of-Concept (SPIFS-POC) instrument. The SPIFS-POC is an optical-imaging instrument capable of high spatial resolutions much finer than the seeing-limit. It achieves this aim by measuring speckle patterns in real time (through the use of an L3CCD), finding the highest quality speckle, and stabilizing it onto a traditional, low readout speed science camera through the use of a fast steering mirror. This process is repeated at ≈100 Hz over the course of long exposures resulting in a high-resolution core surrounded by a diffuse halo. We show that in the Sloan z' bands, SPIFS is able to acquire spatial resolutions much greater than the seeing limit, even approaching 3λ/D. We also discuss improvements for the next phase of the SPIFS project where we fully expect to be able to recover diffraction-limited spatial resolutions in the optical.

Citation Download Citation

Mark Keremedjiev, Stephen S. Eikenberry, and Joseph C. Carson "On-sky demonstration of optical speckle stabilization using the SPIFS-POC", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77351S (15 July 2010); https://doi.org/10.1117/12.856002

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