Collaboration status between ASIAA and Subaru

Shiang-Yu Wang (王祥宇 )Institute of Astronomy and Astrophysics

Academia Sinica

Hyper SuprimeCam• Fits the interests of ASIAA both in the technical and science aspects• Discussions for the collaboration began in late 2006• Funding for HSC-Taiwan secured in 2008• MOU signed Oct 2008

Technical participation in HSC

• Mechanical Shutter (ASRD)• Filter exchanger (ASRD)• CCD procurement and test • Lens testing system (GEOS)• Data reduction software?

Fit the needs of the projectLearn new technology from the developmentBrought in the local companies to help

Mechanical shutter

• Major change of the allowed dimensions in Aug 2008.

• Prototyping stopped• Activity transferred to

NAOJ• New prototype under tests.

Filter exchangerSeparated filter exchanger unit is designed to solve the space and weight constrain

Specification for FEU

• Number of filters: 6 filters• Minimum operational life of filter: 40,000 cycles• Minimum time between maintenance: 4,000 cycles• Max time between two visits in different filters: 10 min

(goal 5 min)• Accommodate SH filter• Filter glass aperture: ϕ600mm• Filter glass thickness: 28mm• position reproducibility : 50 micron• Weight: 240+/-40 kg

FEU centering mechanism

Lens testing system• Test the lens with two different

configurations

Expected Schedule

• Complete detailed design of FEU in March 2009

• First CCD chip to be delivered in March 2009

• Lens testing system completed in Feb 2010

• Delivery of FEU in mid 2010

Scientific interests

• Enhance the collaboration between Japanese and Taiwanese astronomers to use the Subaru telescope

• Participate in the HSC survey

• Mini workshop held in Dec 2008

Interests on HSC survey • Enrich the existing research topics

– Weak lensing survey (Umestu, Nishioka)– High z galaxies study (Lin, Hsieh, Wang)– GRB & SNa study (Huang, Urata)– Solar system (Abe)

• Synergy with on-going projects in Taiwan:– AMiBA– ALMA– TAOS– PanSTARRS

Interests on HSC survey • Enrich the existing research topics

– Weak lensing survey (Umestu, Nishioka)– High z galaxies study (Lin, Hsieh, Wang)– GRB & SNa study (Huang, Urata)– Solar system (Abe)

• Synergy with on-going projects in Taiwan:– AMiBA– ALMA– TAOS– PanSTARRS

AMiBA (Array for Microwave background Anisotropy)

SZE interferometer13 elements implemented in 2009Increasing the photon-collecting area by a factor of ~7.4 Angular resolution is 2 arcmin (10’ FoV)

Simulated AMiBA and Subaru Surveys

Subaru WL

AMiBA13 SZE

ng=30 arcmin^-2zs=1g)=0.4

TAOS (Taiwan America Occultation Survey)

• 4 Robotic telescopes for the search of stellar occultation by KBO and EDOs.