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Integral field spectroscopy with the Gemini multiobject spectrograph I : design, construction, and testing.

Allington-Smith, J.R. and Murray, G. and Content, R. and Dodsworth, G. and Davies, R. and Miller, B. W. and Jorgensen, I. and Hook, I. and Crampton, D. and Murowinski, R. (2002) 'Integral field spectroscopy with the Gemini multiobject spectrograph I : design, construction, and testing.', Publications of the Astronomical Society of the Pacific., 114 (798). pp. 892-912.

Abstract

The Gemini Multiobject Spectrograph (GMOS) installed on the Gemini-North telescope has a facility for integral field spectroscopy over the wavelength range 0.4-1.0 mum. GMOS is converted to this mode by the remote insertion of an integral field unit (IFU) into the beam in place of the masks used for the multiobject mode. With the IFU deployed, integral field spectroscopy is available over a fully filled contiguous field of 5''×7'' with a sampling of 0.2". A separate field of half the area, but otherwise identical, is also provided to improve background subtraction. The IFU contains 1500 lenslet-coupled fibers and is the first facility of any type for integral field spectroscopy employed on an 8-10 m telescope. We describe the design, construction, and testing of the GMOS IFU and present measurements of the throughput both in the laboratory and at the telescope. We compare these with a theoretical prediction made before construction started. All are in good agreement with each other, with the on-telescope throughput exceeding 60% (averaged over wavelength). A second paper will verify the scientific performance by comparison with existing one- and two-dimensional data sets.

Item Type:Article
Keywords:Spectrographs, Spectroscopic.
Full text:Full text not available from this repository.
Publisher Web site:http://www.journals.uchicago.edu/PASP/journal/issues/v114n798/202088/brief/202088.abstract.html
Record Created:21 Feb 2008
Last Modified:27 Oct 2013 21:29

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