SHARC

SimpleHigh AngularResolution Camera


Principle Investigator: James Larkin (UCLA)
Co-Investigator: Ian McLean (UCLA)
Co-Investigator: Bruce Macintosh (LLNL)

Science and Integration Team:
James Larkin
Matthew Barczys
Shelley Wright

Engineering Team:
Jason Weiss
Nick Magnone
Michael Spencer
John Canfield
Gunnar Skulason

SHARC is a diffraction limited infrared camera designed for the Keck Adaptive Optics System. It has been approved by the Keck Science Steering Committee and funded by the CARA board that oversees Keck. SHARC is a fast-track instrument that fills an immediate need for a wide field AO camera to work with the Keck-I AO system.

SHARC's completion was timed to coincide with the implementation of the next generation wavefront controller system (NGWFC) for Keck I Adaptive Optics (AO) system and the new Keck I laser (LGS-AO) system, which both require an imaging camera behind the AO system for engineering tests.


SHARC at a glance:
Detector Rockwell Hawaii-1 Engineering Grade Array
Detector Electronics 4-Channel Leach II IR System
Wavelength Coverage 0.85 - 2.4 microns
Pixel Scale 0.019"/pixel
Effective Field of View 15.0" x 18.6"
Filters 5 Broadband filters (z, J, H, K, K'), 8 Narrowband filters (Jn2, Jn3, Hn2, Hn3, Hn4, Kn2, Kn3, Kn4) , 2 Line specific filters (HeI, FeII_H), and 3 neutral density filters
Slits 25 and 50 micron slits, Five 25 micron pinholes, One 10 micron pinhole, 1" Coronagraphic Stop, 2" Coronagraphic stop, and one Closed Position
Throughput 33% including filter, window, mirrors, and detector
Read Noise 20 e- (measured in IR Lab)
Gain 5.5e- per DN (measured in IR Lab)

2nd light Hband image of Neptune which we achieved on June 8, 2006
with the Keck-1 Natural Guide Star system: