Download Status Report of Taiwan Two Meter Telescope

Status Report of Taiwan Two
Meter Telescope
Yi Chou
Graduate Institute of Astronomy
National Central University
2017/5/23
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2M Telescope Project
• Project started in early 2006
• Funding
– Ministry of Education:5500 project
• Telescope : ~2.6M USD
– National Science Council
• Instrument: ~1.3M USD
– NCU Foundation
• Building, dome & Transportation : ~3.5M USD
– Total: ~7.4 M USD
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Telescope
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2M Telescope
1. Optical system：
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Optical type：Ritchey-Chretien
Effective aperture：2000mm
Focal ratio：Primary F2.2 , combined F8
Concentration ability：80％ of light energy in 0.4 arcsec
Mirror Surface Accuracy: 1/15λ
Available filed of view：1 degree
Maximum Slew Rate: 4 deg/sec
2.Mechanical system：
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Mount type：Alt-Az mount
Total weight：23 ton
Height in total：8664mm
Max. instrument load for Cassegrain focus：500kg
Max. dimension of Csaaegrain instrument： 2m x2m x2m
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Telescope Manufacture
• Nishimura Opt. Ltd. won the contract and
started to design and build the telescope in
early 2007.
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Telescope Manufacture
Oct 2007
Telescope design complete
Jan 2009
Manufacture of mirrors complete
Mar 2009
Mirrors ship to Japan
Major parts of telescope complete
Mar 2010
Integration test complete
Apr 2010
Telescope shipped to Taiwan
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Telescope Design (10/2007)
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Primary Mirror Polishing (06/2008)
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Primary Mirror (02/2009)
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Parts of Telescope (02/2009)
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Taiwan Two Meter Telescope (03/2010)
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Integration Test (03/2010)
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2M in Taiwan Now (in a Warehouse)
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Site and Building
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Mt Jade ~4,000 m
NCU
Lulin
Observatory
~2,860 m
Alisan
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Lulin Observatory
40 cm
Future
2M Telescope Telescope
EPA Lab
Weather
Station
LOT
1 meter teelscope
TAOS-A/B
TAOS-C
NCKU ELF
TAOS-D
基地台
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Taida
LELIS
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Sketch Maps of 2M Telescope and Observatory
Sketch Map of the 2m telescope and
observatory
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Imaginary view of the
2m Observatory
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Difficulties We Met ……
• However, there is a new regulation in Taiwan that the
mountain area above 1500 m was assigned as protected
area and only limit buildings are allowed. Astronomical
observatory was not included.
• Thank to assistant from Chairman Wang of Legislative
Yuan to coordinate government ministries, astronomical
observatory was finally put into the list in late 2007.
• The building permit was issued on 11/15/2008 from
Chiyi county government.
• A local company won the contract for the building and
was ready to start the construction in May 2009 ……
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Difficulties We Met ……
• In May 2009, Environment Protection Administration
(EPA) informed us the construction must be suspended
because the 2M building is located inside an animal
protection area.
– Environmental impact assessment must be done in advanced.
– In this animal protection area, four season’s animal inspection is
essential.
– The building permit was invalid
– The building contract had to be rescinded
• Environmental impact assessment was made from Oct
2009 to Nov 2010 and the report was approved by EPA
in March 2011. The new budget was set and the
construction will be started soon.
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Instrument
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Instrument
• The first generation instrument for 2M telescope is
the Simultaneous Multi-color Imager.
• This 4-color simultaneous imager consists of
– Dichroic mirrors and filters
• split the light into 4 bands: 552-689nm(r), 691-815nm(i), 815915nm(z) and 967-1024nm(y)
– higher QE CCD cameras
• 3 sets of 1100-series cameras were purchased from Spectral
Instruments Inc., USA, within E2V back illuminated deep depletion
CCDs for r,i,z bands
• The other one (NCU-Cam1), with within fully depleted CCD from
Hamamatsu photonics K.K., Japan. and Polycold cryo-cooler, is
developed by NCU instrument team
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4-color Simultaneous Imager
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4-color Simultaneous Imager
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Instrument Lab at NCU
• To make the multi-color
imager for 2M telescope, as
well as for future
instrument developments,
NCU set up an instrument
lab in early 2009.
• Key persons of NCU lab
– Jason Wu: Electrical engineer
– Duncun Chen: Project
assistant
– Azure Yang: Project assistant
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Instrument Development
July-Sep 2010
July 2010
Sep 2010
April 2011
July 2011
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Three 1100-series cameras arrived
A 1100-series camera tested with LOT
Optical adopter design complete
Optical adopter complete
All four camera tested with LOT
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Three 1100-series Cameras Arrived
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A 1100-series Camera Tested with LOT
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LOT/SI1100 First light Image
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LOT/NCUcam-1 First Light Image
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Optical Adopter Design Complete
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Optical Adopter
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Summary
• The manufacture of telescope has been completed and the
telescope has shipped to Taiwan in 2010.
• The environment impact assessment has been completed and
the new budget has set. The construction will be started soon/
• The 4 cameras, including the one we develop (NCUcam1), and
the optical system for the 4-color simultaneous imager have
been complete. The integration test cannot be done due to the
delay of telescope dome construction.
– We are now looking for suitable telescope that allows us to test
instrument’s performance, or, furthermore, start scientific observations.
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Thank You
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