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IDS GENERAL INFORMATION
IDS is a long-slit spectrograph which sits at the Cassegrain Focal station
of the 2.5m INT and is equipped with two cameras, called the 235mm and 500mm
Cameras. Their names denote their respective focal lengths. Presently,
only the 235 mm camera is offered.
A wide range of gratings are available (16 in all). Possible grating combinations
with the 235mm camera and the EEV10 detector allow dispersions of between
0.24 and 3.7 Å per pixel. This corresponds to spectral resolutions
ranging from 0.5 Å to 7.5 Å FWHM (corresponding to two pixels
FWHM on the detector).
IDS is presently offered in combination with the EEV10 detector. (Click here for characteristics
of the 4kx2k thinned EEV42-80 chip).
With the 235 mm camera and the EEV10 CCD,
Information on the slit-viewing orientation on the TV, and correspondance
with chip geometry
Some observers may want to work out the direction that the slit was pointing,
and which end of the slit corresponds to which direction spatially on the
particular CCDS. Here you have some help:
If the IDS is not suitable for me, what other possible options are there
available at ING ?
An intermediate dispersion spectrograph, ISIS with a double-arm
facility (allowing simultaneous red and blue light observations) is available
on the 4.2m WHT and provides similar spectral resolution to the IDS and is
more efficient (on the top of the larger mirror diameter of the WHT).
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Last Updated:2 August 2006
Romano Corradi, rcorradi@ing.iac.es
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