Share Email Print
cover

Proceedings Paper

Centroid precision as a function of total counts in a windowed CMOS image of a point source
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We obtained 960,200 22-by-22-pixel windowed images of a pinhole spot using the Teledyne H2RG CMOS detector with un-cooled SIDECAR readout. We performed an analysis to determine the precision we might expect in the position error signals to a telescope's guider system. We find that, under non-optimized operating conditions, the error in the computed centroid is strongly dependent on the total counts in the point image only below a certain threshold, approximately 50,000 photo-electrons. The LSST guider camera specification currently requires a 0.04 arcsecond error at 10 Hertz. Given the performance measured here, this specification can be delivered with a single star at 14th to 18th magnitude, depending on the passband.

Paper Details

Date Published: 19 July 2010
PDF: 7 pages
Proc. SPIE 7742, High Energy, Optical, and Infrared Detectors for Astronomy IV, 774228 (19 July 2010); doi: 10.1117/12.857659
Show Author Affiliations
Ron Wurtz, Lawrence Livermore National Lab. (United States)
Scot Olivier, Lawrence Livermore National Lab. (United States)
Vincent Riot, Lawrence Livermore National Lab. (United States)
Brandon J. Hanold, Rochester Institute of Technology (United States)
Donald F. Figer, Rochester Institute of Technology (United States)


Published in SPIE Proceedings Vol. 7742:
High Energy, Optical, and Infrared Detectors for Astronomy IV
Andrew D. Holland; David A. Dorn, Editor(s)

© SPIE. Terms of Use
Back to Top