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Event Information

Prime Focus Spectrograph (PFS) General Collaboration Meeting

4-7 November, 2013
Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG), Universidade de São Paulo

One spectrograph module of Prime Focus Spectrograph. Galaxy/star light entering each of 2400 fibers placed at the Prime Focus of Subaru 8.2-meter telescope reaches one of four identical spectrograph modules and is dispersed into three color arms (c)Kavli IPMU

Event Information

Date / Time

November 4 (Mon.) - 7 (Thu.), 2013


Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG), Universidade de São Paulo
Nov. 4th and in the morning of Nov. 5th:
the IAG Auditorium, in the Astronomy Department
In the afternoon of Nov. 5th:
the Physics Auditorium "Giuseppe Ochiallini"



Contact / Registration

Closed session


1. Prime Focus Spectrograph (PFS)

The Prime Focus Spectrograph (PFS) of the Subaru Measurement of Images and Redshifts (SuMIRe) project has been endorsed by Japanese community as one of the main future instruments of the Subaru 8.2-meter telescope at Mauna Kea, Hawaii. This optical/near-infrared multi-fiber spectrograph targets cosmology with galaxy surveys, Galactic archaeology, and studies of galaxy/AGN evolution.

Taking advantage of Subaru’s wide field of view, which is further extended with the recently completed Wide Field Corrector, PFS will enable us to carry out multi-fiber spectroscopy of 2400 targets within 1.3 degree diameter. A microlens is attached at each fiber entrance for F-ratio transformation into a larger one so that difficulties of spectrograph design are eased. Fibers are accurately placed onto target positions by positioners, each of which consists of two stages of piezo-electric rotary motors, through iterations by using back-illuminated fiber position measurements with a wide-field metrology camera. Fibers then carry light to a set of four identical fast-Schmidt spectrographs with three color arms each: the wavelength ranges from 0.38 um to 1.26 um will be simultaneously observed with an average resolving power of 3000.

Before and during the era of extremely large telescopes, PFS will provide the unique capability of obtaining spectra of 2400 cosmological/astrophysical targets simultaneously with an 8-10 meter class telescope. The PFS collaboration, led by IPMU, consists of USP/LNA in Brazil, Caltech/JPL, Princeton, & JHU in USA, LAM in France, ASIAA in Taiwan, and NAOJ/Subaru.

2. General Collaboration Meeting as UTokyo Forum

In order to efficiently develop this relatively large international project, it is necessary that members including science and technical teams get together and discuss the latest research and instrument designing/building statuses. Kavli IPMU (WPI) is leading the PFS project, including PI, Project office, and Science leader, while Brazil team is in charge of fiber system, which is a key subsystem on this multi-fiber spectrograph. It greatly helps our PFS development, therefore, to have a General Collaboration Meeting as UTokyo Forum.


November 4 - Day 1: General session - Overview of current status and plans forward

10:00 Meeting overview & Opening remarks: TBD/Laerte Sodre Jr.
10:25 PFS collaboration -- high-level overview: Hitoshi Murayama
10:45 Science perspectives and survey plan: Masahiro Takada
11:15 Project status and progress report: Hajime Sugai
11:45 Instrument and system design: Naoyuki Tamura
13:40 Instrument subsystem overview
1 Fiber positioner system: C.Fisher/D.Braun
2 PFI: M.Schwochert/S-Y.Wang
3 Metrology camera: S-Y.Wang
4 Fiber system: L.S. de Oliveira/A.C. de Oliveira
5 Spectrograph system: S.Vives/D. Le Mignant
6 Detector & cryostat: J.Gunn
7 Software system: A.Shimono
8 Data reduction pipeline: S.Bickerton
9 Calibration system: J.Gunn
17:35 HSC current status: Masahiro Takada

November 5 - Day 2: Discussion session

10:00 Survey plans -- recent updates & discussion
1 Cosmology: M.Takada / N.Suzuki
2 Galaxy & AGN evolution: J.Greene
3 Galactic Archaeology: M.Chiba
13:45 Discussion of requirements for science operation to the system software
1 Current status and action items: A.Shimono
2 SDSS survey design & operation: Inputs for PFS: J.Gunn / M.Strauss
15:00 AIT flow to/at Subaru: N.Takato/N.Tamura
16:00 Break-up sessions
requirements for science operation to the system software

November 6, 7 - Group Meetings


Laerte Sodre Junior Professor, USP
Claudia Mendes de Oliveira Professor, USP
Luis Raul Abramo Associate Professor, USP
Hitoshi Murayama Director, Kavli IPMU, UTokyo
Hajime Sugai Project Associate Professor, Kavli IPMU, UTokyo
Masahiro Takada Professor, Kavli IPMU, UTokyo
Naoyuki Tamura Project Assistant Professor, Kavli IPMU, UTokyo
Atsushi Shimono Project Academic Support Specialist, Kavli IPMU, UTokyo

Related Websites

FIRST Program (by Cabinet Office, Government of Japan) SuMIRe Project http://sumire.ipmu.jp/en/
Prime Focus Spectrograph http://sumire.ipmu.jp/pfs/index.html