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McDonald Observatory

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9.2m Hobby-Eberly Telescope

2.7m Harlan J. Smith Telescope

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Employment
2.7m (107") Harlan J. Smith Telescope



Memo to Observers
June 7, 2004 — pdf



Instruments

Cassegrain f/8.8
Ritchey-Chretien focus

CCD WHT Camera
Imaging Grism Instrument (IGI)

Cassegrain f/17.7 focus
Large Cass Spectrometer (LCS)
LCS-Spectropolarimeter (SPol)
Photometer (P45)

Coudé f/32.5 focus
Coudé Spectrometer (cs1)
 - Two foci available
Cross-Dispersed Echelle Spectrometer (cs2)
 - Two foci available

TCS
107" TCS Manual
107" TCS Quick Start
107" TCS Troubleshooting

Cautions
2.7m Cautions

Optical

  Primary Mirror
diameter:
2.72m (107")
focal length:
10.68m (35')
f-ratio:
3.93

  Cassegrain f/8.8
  Ritchey-Chretien focus

focal length:
23.91m (78.4')
f-ratio:
8.8
field angle:
61.5 arcmin
plate scale:
8.62 arcsec/mm

  Cassegrain f/17.7 focus

focal length:
47.98m (157.4')
f-ratio:
17.65
field angle:
31 arcmin
plate scale:
4.29 arcsec/mm

  Coudé f/32.5 focus

focal length:
88.43m (290.1')
f-ratio:
32.54
field angle:
3 arcmin
plate scale:
2.32 arcsec/mm

Mechanical

  Primary Mirror
weight:
3540kg (7800 lbs)
thickness:
31.8cm (12.5")
material:
fused silica

  Telescope Tube
diameter:
3.66m (12')
length:
9.75m (32')

  Telescope
weight:
145t (190 tons)

  Bearings
polar axis:
pressurized oil and radial thrust bearings
dec axis:
preloaded ball bearings

  Dome
diameter:
23m (76')
weight:
395t (435 tons)

Historical

  Construction
started:
April 1966
completed:
October 1968

  Contractor
design:
Charles Jones, Inc.
telescope:
Westinghouse
dome:
C.H. Lovell Construction Co.
optics:
Davidson Optronics
harlan j. smith dome

harlan j. smith telescope
 




27 August 2007
Astronomy Program · The University of Texas at Austin · Austin, Texas 78712
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