Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7735e..60k&link_type=abstract
Ground-based and Airborne Instrumentation for Astronomy III. Edited by McLean, Ian S.; Ramsay, Suzanne K.; Takami, Hideki. Pro
Astronomy and Astrophysics
Astronomy
Scientific paper
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.
Carson Joseph C.
Eikenberry Stephen Scott
Keremedjiev Mark
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