Physics – Optics
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19410302m&link_type=abstract
American Astronomical Society, 194th AAS Meeting, #103.02; Bulletin of the American Astronomical Society, Vol. 31, p.1001
Physics
Optics
Scientific paper
A new near-infrared integral field spectrograph employing image slicer optics has been built and operated on the Palomar 200-inch Telescope. The Palomar Integral Field Spectrograph (PIFS) is best suited to kinematic studies of emission line gas in morphologically complex galaxies, such as ultraluminous infrared galaxies and high-redshift radio galaxies. The all-cryogenic spectrograph design acts as a front-end to either of two 256x256 infrared array cameras, covering the 1-2.5 micron or 1-5 micron wavelength ranges. Standard machining techniques, including diamond fly-cutting of the image slicer optical surfaces, were used in the production of the all-aluminum image slicer, allowing for an inexpensive and rapid construction project. The 5.5''x9.5'' field of view is split into eight slits, and feeds two independent spectrographs within the same dewar. Two resolution modes are available, as well as a broad-band imaging mode for photometry and target acquisition. Spectral resolutions offered are R~ 1300 and R~ 600. The PIFS was first used on the 200-inch Telescope in 1998 September. The performance was as predicted, with a total system throughput of 22%, enabling detection of a K=18 (0.04 mJy) continuum source at 5sigma in one hour at the high resolution setting. Example data for ultraluminous infrared galaxies, showing velocity-resolved images of the Paalpha emission line, are presented. Primary funding for the PIFS was provided by the National Science Foundation.
Matthews Keith
Murphy Thomas W.
Neugebauer Gernot
Soifer Thomas B.
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