Spectrograph Synopses

NOTES
DISPERSER: given as rulings per mm / 1st order blaze wavelength DISPERSION: Angstroms/pixel for the given detector RANGE: the useful wavelength range COVERAGE: the maximum wavelength coverage for a single exposure RESOLUTION: lambda/delta lambda at blaze wavelength; narrow slit
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UNIVERSITY OF CALIFORNIA OBSERVATORIES / LICK OBSERVATORY

SYNOPSES OF MOUNT HAMILTON FACILITY INSTRUMENTS: SPECTROGRAPHS

NOTES BACK

INSTRUMENT TELESCOPE

DISPERSER DISPERSION RANGE COVERAGE
DETECTOR

HAMILTON ECHELLE
SPECTROGRAPH
A prism cross-dispersed,
high-resolution instrument.
Steve Vogt, UCSC Shane 3-m coude
and
Coude Auxiliary Telescope (CAT)

resolution ~ 95000 @ 6500 A

echelle 0.029 A/pix @ 3500 A
0.083 A/pix @ 9840 A
3500-10000 A 6500 A

dewar #6, 2048 x 2048 thinned CCD, 15-u pixels

KAST DOUBLE
SPECTROGRAPH
A simultaneous red/blue,
two-channel instrument,
with limited imaging capability.
Joe Miller, UCSC Shane 3-m
cassegrain

red channel: resolution ~ 500-3000

600 / 5000 A 2.35 A/pix 3800-10000 A 2820 A

600 / 7500 A 2.32 A/pix 3800-10000 A 2780 A

830 / 8460 A 1.70 A/pix 3800-10000 A 2040 A

1200 / 5000 A 1.17 A/pix 3800-7310 A 1404 A

300 / 4230 A 4.59 A/pix 3800-11000 A 5508 A

300 / 7500 A 4.60 A/pix 3800-11000 A 5520 A

blue channel: resolution ~ 700-1700

452 / 3306 A 1.41 A/pix 3100-6200 A 2890 A

600 / 4310 A 1.02 A/pix 3100-5520 A 2090 A

830 / 3460 A 0.63 A/pix 3100-4550 A 1290 A

A polarimeter is available for use in both channels.
red channel:
Kast Red dewar, 400 x 1200 thinned CCD, 27-u pixels
blue channel:
Kast Blue dewar, 2048 x 2048 Fairchild CCD, 15-u pixels

NICKEL SPECTROGRAPH
Richard Stover, UCSC Nickel 1-m
cassegrain

resolution ~

300 / 5500 A 7.6 A/pix - 9120 A

600 / 6500 A 2.5 A/pix - 3000 A

600 / 4820 A 3.5 A/pix - 4820 A

300 / 7800 A 7.2 A/pix - 8640 A

420 / 5600 A 5.0 A/pix - 6000 A

echism 2.0 A/pix - order dependent

Numbers are for 110 mm camera lens; 58 mm lens is no longer supported..
The 300/5500A and 300/7800A are not recommended for use.

dewar #9, 400 x 1200 thinned CCD, 27-u pixels

GEMINI
THE UCLA TWIN-ARRAYS INFRARED CAMERA
A simultaneous two-channel instrument with direct imaging capabilites.
Ian McLean, UCLA Shane 3-m
cassegrain

short wave channel: resolution ~

J-Grism 11.7 A/pix 1.08 - 1.38 um 3000 A

H-Grism 15.9 A/pix 1.44 - 1.85 um 4050 A

long wave channel: resolution ~

K-Grism 19.2 A/pix 1.92 - 2.41 um 4900 A

short wave channel:
256 x 256 NICMOS3 HgCdTe array, 40-u pixels
long wave channel:
256 x 256 SBRC InSb array

IRCAL / Lick Adaptive Optics
The Lick AO system and IRCAL camera is primarily a direct imaging instrument, but offers limited spectrograph capability.
Shane 3-m
cassegrain
See IRCAL manual

NOTES

DISPERSER: given as rulings per mm / 1st order blaze wavelength
DISPERSION: Angstroms/pixel for the given detector
RANGE: the useful wavelength range
COVERAGE: the maximum wavelength coverage for a single exposure
RESOLUTION: lambda/delta lambda at blaze wavelength; narrow slit

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