Telling planets from speckles created by telescope segmentation

Details Telling planets from speckles created by telescope segmentation Telling planets from speckles created by telescope segmentation

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7733e.158y&link_type=abstract

Ground-based and Airborne Telescopes III. Edited by Stepp, Larry M.; Gilmozzi, Roberto; Hall, Helen J. Proceedings of the SPIE,

Physics

Scientific paper

Segmentation of telescope's primary mirror creates quasi-static speckles in an image. These speckles are impediment for the detection of faint structures around stars, for instance exoplanets. An elaborated postprocessing method is required to improve the detection level. The Stochastic Speckle Discrimination (SSD) method developed for this purpose uses statistical variability of intensity to distinguish between planets and speckles. To calculate the efficiency of SSD we derive analytical expressions for mean and standard deviation of point spread function (PSF) produced by segmented pupil. The expressions are general for any point in the image plane, but there is a difference in statistical behavior for the central point and for the off-axis point. In particular we show that a modified Rician distribution is inapplicable to describe on-axis intensity. In the last section we calculate the level of primary mirror phasing required for the efficient use of SSD.

Affiliated with

Also associated with

No associations

Rating

Telling planets from speckles created by telescope segmentation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Telling planets from speckles created by telescope segmentation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telling planets from speckles created by telescope segmentation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1377903