Status Report of Taiwan Two Meter Telescope Yi Chou Graduate Institute of Astronomy National Central University 2016/1/ 兩岸天文儀器會議

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 2016/1/ 兩岸天文儀器會議

Telescope 2016/1/ 兩岸天文儀器會議

2M Telescope 1. Optical system ： 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 ： 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 2016/1/ 兩岸天文儀器會議

Telescope Manufacture Nishimura Opt. Ltd. won the contract and started to design and build the telescope in early /1/ 兩岸天文儀器會議

Telescope Manufacture Oct 2007Telescope design complete Jan 2009Manufacture of mirrors complete Mar 2009Mirrors ship to Japan Major parts of telescope complete Mar 2010Integration test complete Apr 2010Telescope shipped to Taiwan 2016/1/ 兩岸天文儀器會議

Telescope Design (10/2007) 2016/1/ 兩岸天文儀器會議

Primary Mirror Polishing (06/2008) 2016/1/ 兩岸天文儀器會議

Primary Mirror (02/2009) 2016/1/ 兩岸天文儀器會議

Parts of Telescope (02/2009) 2016/1/ 兩岸天文儀器會議

Taiwan Two Meter Telescope (03/2010) 2016/1/ 兩岸天文儀器會議

Integration Test (03/2010) 2016/1/ 兩岸天文儀器會議

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2M in Taiwan Now (in a Warehouse) 2016/1/ 兩岸天文儀器會議

Site and Building 2016/1/ 兩岸天文儀器會議

Lulin Observatory ~2,860 m Mt Jade ~4,000 m NCU Alisan 2016/1/ 兩岸天文儀器會議

Lulin Observatory LOT 1 meter teelscope TAOS-C NCKU ELF TaidaLELIS 40 cm Telescope TAOS-D TAOS-A/B  環保署 基地台 WeatherStation EPA Lab Future 2M Telescope 2016/1/ 兩岸天文儀器會議

Sketch Maps of 2M Telescope and Observatory Sketch Map of the 2m telescope and observatory Imaginary view of the 2m Observatory 2016/1/ 兩岸天文儀器會議

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 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 …… 2016/1/ 兩岸天文儀器會議

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 The new budget was set and the construction will be started soon. 2016/1/ 兩岸天文儀器會議

Instrument 2016/1/ 兩岸天文儀器會議

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: nm(r), nm(i), nm(z) and nm(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 2016/1/ 兩岸天文儀器會議

4-color Simultaneous Imager 2016/1/ 兩岸天文儀器會議

4-color Simultaneous Imager 2016/1/ 兩岸天文儀器會議

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 Key persons of NCU lab – Jason Wu: Electrical engineer – Duncun Chen: Project assistant – Azure Yang: Project assistant 2016/1/ 兩岸天文儀器會議

Instrument Development July-Sep 2010Three 1100-series cameras arrived July 2010A 1100-series camera tested with LOT Sep 2010Optical adopter design complete April 2011Optical adopter complete July 2011All four camera tested with LOT 2016/1/ 兩岸天文儀器會議

Three 1100-series Cameras Arrived 2016/1/ 兩岸天文儀器會議

A 1100-series Camera Tested with LOT 2016/1/ 兩岸天文儀器會議

LOT/SI1100 First light Image 2016/1/ 兩岸天文儀器會議

LOT/NCUcam-1 First Light Image 2016/1/ 兩岸天文儀器會議 31

Optical Adopter Design Complete 2016/1/ 兩岸天文儀器會議

Optical Adopter 2016/1/ 兩岸天文儀器會議 33

Summary The manufacture of telescope has been completed and the telescope has shipped to Taiwan in 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. 2016/1/ 兩岸天文儀器會議

Thank You 2016/1/ 兩岸天文儀器會議