Stop press: GMOS-1 availability in semester
2001B on GEMINI-North has been announced. Full details may be found
on the
GEMINI GMOS web page including full details of how to apply for time,
expected performance (based on measurements from lab tests) and an exposure
time calculator.
GEMINI Multiobject
Spectrographs
There will be one GMOS for each of the two GEMINI
8-m telescopes ( UK mirror
). They will provide a versatile low/medium resolution spectroscopic
capability which will exploit the excellent image quality delivered by
the telescopes at optical and near-infrared wavelengths.
The instruments will be able to switch, under computer control, between
the following modes of operation.
-
Multislit spectroscopy using custom-made masks
-
Integral
field spectroscopy with 0.2 arcsec sampling
-
Longslit spectroscopy using special masks
-
Direct imaging to support multiobject spectroscopy
The basic parameters are:
-
Image scale: 0.07 arcsec/pixel
-
Field of view: 5.5 x 5.5 arcmin
-
Detector: A mosaic of 3 CCDs each with 4608 x 2048 format (13.5um pixels)
-
Wavelength range: 0.36-1.1 microns (with a design capability to 1.8
microns)
-
Resolving power: up to 10,000 with 0.25 arcsec slits
The instruments will be fed via the articulated telescope secondary
mirror which will provide tip-tilt stabilised images. The telescopes are
designed to exploit the best free-atmosphere seeing at Mauna Kea (0.25
arcsec FWHM in 10th percentile conditions).
The project is being carried out jointly by Canada and the UK, involving
the following institutions.
It is managed by Rick Murowinski (Canada; murowinski @dao.nrc.ca)
and Terry Purkins (UK; tep @roe.ac.uk).
The science team consists of the Work-package scientists: Roger Davies
(roger.davies @durham.ac.uk) and David Crampton (crampton @dao.nrc.ca)
and the instrument scientist: Jeremy Allington-Smith (j.r.allington-smith
@durham.ac.uk).
The project is directed and funded by the GEMINI 8-m Telescopes Project
and, domestically, by the National Research Council of Canada (NRC-CNRC)
and the UK Particle Physics and Astronomy Research Council (PPARC).
Current status
-
Two key documents:
-
Passed the Conceptual Design Review in June 1995
-
Passed the Preliminary Design Review in March 1996
-
Passed the Critical Design Review in February 1997
Further information available to the public
Contact person and data format are shown in parentheses.
-
Optical layout
showing the combined Atmospheric Dispersion Compensator and field corrector,
collimator and camera. The last element shown is the detector window. (Morbey;
GIF)
-
Mechanical layout
showing GMOS attached to the Instrument Support Structure with the
enclosure removed. Layout
with enclosure. Mechanical
layout showing GMOS attached to the Instrument Support Structure with
the enclosure removed (Hastings; GIF). More
colourful view showing the details of the enclosure and location of
the electronics modules (Szeto; GIF).
-
Integral field
unit Further information including mechanical layout.
-
General
description (Allington-Smith et al. 1996, GEMINI Newsletter
13, 8-11, Dec 1996; gzip/postscript 354Kb)
-
Summary paper
(Davies et al. 1997, SPIE 2871, 1099-1106; gzip/postscript 254b).
-
Summary paper
(Murowinski et al. 1998, SPIE 3355; gzip/postscript 59Kb).
-
Paper on integral
field spectroscopy (Allington-Smith et al. 1997, SPIE 2871,
1284-1294; gzip/postscript 285Kb)
-
Paper on the
detector focus and translation stage (Hastings et al. 1997,
SPIE 2871; gzip/postscript 282Kb)
-
Paper on the
mask making system (Szeto et al. 1997, SPIE 2871; gzip/postscript
532Kb)
-
Paper
on the on-instrument wavefront sensor
(Roberts et al. 1997,
SPIE 3132; gzip/postscript 197Kb)
Pictures of assembly
Further information available to the GMOS team
This information is not confidential but may contain some proprietary
information so members of the public are asked not to view these documents.
Documentation
ftp site
Jeremy Allington-Smith
j.r.allington-smith@durham.ac.uk
13 March 2001
