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13 October 1986The Faint Object Spectrograph For The 2.5M Isaac Newton Telescope
The faint object spectrograph (FOS) is a highly efficient, fixed format spectrograph using a CCD detector and aimed at low resolution (15-20Å fwhm) spectrophotometry over the range 4000 to 10500K. The overall efficiency including atmosphere and telescope absorption is 12% at 7000K and a zenith distance of 27.5. It has a fixed spectrum format and is provided with an extensive set of on-line data reduction and analysis operations.
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J. M. Breare, R. S. Ellis, J. R. Powell, "The Faint Object Spectrograph For The 2.5M Isaac Newton Telescope," Proc. SPIE 0627, Instrumentation in Astronomy VI, (13 October 1986); https://doi.org/10.1117/12.968100