AAS 207th Meeting, 8-12 January 2006
Session 78 Seeing the Universe in a New (Sodium) Light: Early Science Results from Laser Guide Star Adaptive Optics
Poster, Tuesday, 9:20am-6:30pm, January 10, 2006, Exhibit Hall

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[78.09] OSIRIS Laser Guide Star Adaptive Optics Observations at Keck Observatory

S. A. Wright, J. E. Larkin, M. Barczys (UCLA), C. Iserlohe, A. Krabbe (Inst. of Physics, Univ. of Cologne), M. McElwain, J. Weiss (UCLA)

OSIRIS (OH-Suppressing Infra-Red Imaging Spectrograph) is an imaging camera and integral field spectrograph for the Keck Observatory Adaptive Optics system. The spectrograph utilizes an array of lenses and the latest infrared detector to simultaneously obtain more than 3000 spectra over a rectangular field of view (up to 48x64 spatial elements). In its broadband mode (16x64 spectra), each spectrum contains more than 1700 wavelength channels and covers an entire infrared band at a resolution of 3800. The instrument is extremely sensitive due to high resolution AO sampling, and because OSIRIS is able to isolate the exceedingly low background levels between night sky lines. We have had 2.5 successful nights of OSIRIS commissioning with the Laser Guide Star Adaptive Optics (LGS-AO) system. We present preliminary results of OSIRIS LGS-AO observations on a variety of sources, including the Galactic Center source Sgr A*, the radio galaxy 4c +48.48 (z = 2.34), and the nearby radio galaxy Cygnus A. In addition, we will discuss OSIRIS sensitivity limits and LGS-AO observing strategies for probing internal kinematics of cosmologically distant galaxies.

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Bulletin of the American Astronomical Society, 37 #4
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