Share Email Print
cover

Proceedings Paper

Swimming with ShARCS: comparison of on-sky sensitivity with model predictions for ShaneAO on the Lick Observatory 3-meter telescope
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The Lick Observatory's Shane 3-meter telescope has been upgraded with a new infrared instrument (ShARCS - Shane Adaptive optics infraRed Camera and Spectrograph) and dual-deformable mirror adaptive optics (AO) system (ShaneAO). We present first-light measurements of imaging sensitivity in the Ks band. We compare mea- sured results to predicted signal-to-noise ratio and magnitude limits from modeling the emissivity and throughput of ShaneAO and ShARCS. The model was validated by comparing its results to the Keck telescope adaptive optics system model and then by estimating the sky background and limiting magnitudes for IRCAL, the pre- vious infra-red detector on the Shane telescope, and comparing to measured, published results. We predict that the ShaneAO system will measure lower sky backgrounds and achieve 20% higher throughput across the JHK bands despite having more optical surfaces than the current system. It will enable imaging of fainter objects (by 1-2 magnitudes) and will be faster to reach a fiducial signal-to-noise ratio by a factor of 10-13. We highlight the improvements in performance over the previous AO system and its camera, IRCAL.

Paper Details

Date Published: 7 August 2014
PDF: 13 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91482Z (7 August 2014); doi: 10.1117/12.2055672
Show Author Affiliations
Srikar Srinath, Univ. of California, Santa Cruz (United States)
Rosalie McGurk, Univ. of California, Santa Cruz (United States)
Constance Rockosi, Univ. of California, Santa Cruz (United States)
Renate Kupke, Univ. of California Observatories (United States)
Donald Gavel, Univ. of California Observatories (United States)
Gerald Cabak, Univ. of California Observatories (United States)
David Cowley, Univ. of California Observatories (United States)
Michael Peck, Univ. of California Observatories (United States)
Christopher Ratliff, Univ. of California Observatories (United States)
Elinor Gates, Univ. of California Observatories (United States)
Daren Dillon, Univ. of California Observatories (United States)
Andrew Norton, Univ. of California Observatories (United States)
Marc Reining, Univ. of California Observatories (United States)


Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

© SPIE. Terms of Use
Back to Top