optical & infrared instrumentation effort in...
TRANSCRIPT
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Optical & Infrared Instrumentation Effort in ASIAA
Shiang-Yu Wang (王祥宇)
Institute of Astronomy and Astrophysics
Academia Sinica
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Growth of ASIAA
Future Large OIR facilities in China 2016/11/10
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Total number of ASIAA Faculty (including Research Scientists/Engineers) by Year
Total ofFaculty
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ASIAA Instrumentation Projects •RADIO: SMA --- AMiBA --- ALMA --- GLT
•OIR: TAOS-1 --- CFHT/WIRCam --- Subaru/HSC
• TAOS-2 SPIROU PFS SPICA
(2003) (2009) (2012) (2016)
(2016) (2016) (2017) (?)
(2004) (2005) (2011)
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Development Strategy • Develop the instrumentation capability rather
than build large telescopes considering the the budget and community size
• Collaborate with advanced telescopes with large aperture. – CFHT: WIRCam(2005), Flyeyes(2009), SPIRou(on going) – Subaru: HSC(2013), PFS(on going)
• Build small telescope systems – TAOS I (2005) & TAOS II (on going)
• Provide the access to the advanced optical/IR telescopes.
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CFHT/SPIRou • Led by IRAP in Toulouse (Jean-Francois Donati) from 2009
– UoM, HIA, are major partners
– Brazil, Geneva, Portugal, ASIAA are minor partners
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SPIRou Parameters • Single-shot 0.95-2.40 µm coverage
• Resolving power : ~70 000
• Short and long-term stability
– RV accuracy <1m/s
• Dual channel polarimeter, <1% crosstalk between states
• Peak throughput ≈15%, S/N=110 per 2 km/s in 1h for J=12, K=11
• Thermal background smaller than telescope+sky background
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Our Contribution in SPIRou • Tip tilt and viewing camera
– Provide the correction signal to image stabilizer unit at 50Hz
– Targeted target star position error respected to the pickup mirror <0.05” during the exposures
– Based on a commercial camera with fast centroiding algorithm
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Subaru collaboration
• Started from 2008 for the development of Hyper SuprimeCam – ASIAA is responsible for the filter exchanger unit,
CCD procurement & test, WFC test system
• HSC Hardware delivered to Hawaii in late 2012
• HSC started science operation in March 2014
• Prime Focus Spectrograph started from 2010 – ASIAA is responsible for the metrology camera
and most work of the Prime Focus Instrument
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Superior Image Quality
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HSC Survey (2014-2019) • Wide : 1400 square degree • Deep field: XMM-LSS, E-COSMOS, ELAIS-N1,
DEEP2-3 • UD field: SXDS/UKIDSS, COSMOS
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Prime Focus Spectrograph
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Key Parameters of PFS
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ASIAA’s Role in PFS • Prime focus Instrument:
– Major structures, electronics, cameras
– System Integration and Test
– Control software
• Metrology camera
– The whole subsystem
• Software and hardware
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Focal plane and Cobra motors
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patrol dia. 9.5mm
q Stage (2.4mm)
f Stage (2.4mm))
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PFI components Cable wrapper
optical bench and field element
Fitting tests Telescope interface structure
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Integration & Test of PFI • Integrate the 48 Cobra modules
– 1.5 years for the whole process
• Measure all fiber home position in x, y, z and tilt at 5, 0 and -5 degree C
– 10 µm position accuracy
– 5’ accuracy in fiber tilt
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PFS Metrology Camera • 380mm aperture Schmidt telescope • 50M pixel CMOS sensor • Measure all fiber positions with 3 microns error in 2 sec
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TransNeptunian Automatic Occultation Survey (TAOS II)
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TAOS II System
• Follow >10,000 stars simultaneously – Event rate <0.001/star/year
– 1.3m F/4 wide field telescopes. Rlim = 16.5 @ 20Hz (5σ)
• High speed imaging – Event duration ~200 ms, significant diffraction: 20 Hz sampling
rate
– Custom CMOS imagers: multiple sub-frame readout
• Minimize false positive rate – Require coincident detection in multiple telescopes
– Telescopes separated by >100m to minimize false positives from scintillation
– Three identical telescope systems separated by 130m to 320m
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Three TAOS II Telescopes Completed by DFM
10/28/2016 XAO
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Telescope #1 (J705)
10/28/2016 XAO
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Cameras • High speed readout with
low noise
• Custom CMOS from e2v
– 1920×4608 3-edge buttable
– Back illuminated
– Sub-aperture readout, onboard CDS
• One prototype cameras with test device
– Smaller pixel 1Kx2K
– For the control system tests on site
• Science camera with 10 mosaic CMOS sensors
10/28/2016 XAO
154 mm TAOS focal plane
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Custom CMOS Devices from e2v (CIS 113)
10/28/2016 XAO
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XAO 10/28/2016
Test Results of CIS 113 Device by e2v
Parameter
Measured
value
Specifications Units
QLIN 15.5 15 ke-
QSAT 19 17.5 ke-
CVF 91 80 μV/e-
Minimum Lag 4.1 1 %
RON 2.3 7 e- RMS
PRNU 2.0 3 %RMS
MOVS 1.61 1.4 V
QE @800nm 47 >20 %
FSR 1.2 1.2 V
Non Linearity 0.8 5 %
Dark current 0.14 0.5 e- /pix/s @0oC
Dynamic
Range
75.2 66 dB
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10/28/2016 XAO
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San Pedro Mártir
• More than 250 clear nights per year
• Good seeing (0.6 arc sec.) • Dark Sky
– V: 21.5 mag/sq. arc sec.
– R: 20.7 mag/sq. arc sec.
• Light pollution ordinance in effect for Baja California – Working on the same for Baja
California Sur, Sonora
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10/28/2016 XAO
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Prospective • Project readiness review
April 2016
• Start enclosure construction Sep 2016
• Install telescopes Mar 2017
• Last delivery of CMOS devices by April 2107
• Finish cameras June 2017
• Start survey late 2017
10/28/2016 XAO
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TMT WFOS • ASIAA was involved in the ministudy of the
mask exchange system with NAOJ and NAOC
• Tradeoffs between the mask exchange time and the number of masks in MOBIE
– On board or fixed robot
– Curved or flat masks
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Summary
• ASIAA has been engaged in different large OIR instruments and delivered key components
• The Chinese large OIR telescope projects are attractive to astronomers in Taiwan, especially the spectroscopic capabilities.
• We are happy to share our experience and expertise for the large telescope projects.
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