Category Archives: Development

Metrology Camera left Taiwan to Hawaii / メトロロジカメラがハワイに向けて台湾を出発しました

One of the PFS instrument “Metrology Camera” was finally shipped from Taiwan to Hawaii!! Metrology Camera  is an instrument used to measure the fibers position while we configure fibers to target objects. Academia Sinica Institute of Astronomy and Astrophysics (ASIAA) in Taiwan has the responsibility for Metrology Camera development, and they tested its performances before shipping in the last a… Read more »

Database prototype was opened to PFS collaboration / データベース・プロトタイプシステムの内部公開

Written by Masayuki Tanaka (NAOJ) PFS survey is going to collect a huge amount of data.  Thanks to the high multiplexity with 2400 fibers, we are going to collect as many as 67,000 spectra in a single night according to the current survey plan.  In addition, we will measure a variety of physical parameters  — redshifts of galaxies, strengths of emission and absorption… Read more »

Updates on Development of Metrology Camera System / メトロロジカメラ開発は今…

“Metrology Camera System” is one of the PFS instrument subsystems under development by ASIAA (Academia Sinica Institute of Astronomy and Astrophysics, Taiwan). This is a small telescope system installed onto the Cassegrain Focus at the bottom of the Subaru telescope to look up the Prime focus, take the image of approximately 2400 back-illuminated fiber spots in one exposure with the large… Read more »

The 1st blue camera cryostat was delivered in Marseille / 1台目の青カメラがマルセイユに到着

In January 2018, the visible-blue camera cryostat of the first spectrograph module was shipped from Johns Hopkins University (JHU, the United States of America) to Laboratoire d’Astrophysique de Marseille (LAM, France). Visible-blue camera at Johns Hopkins University PFS are developing the four identical spectrograph modules, each of which has three channels with visible-blue, visible-red and near-infrared camera units, in order to… Read more »

Joint work for shipping the first positioner module / ファイバー配置モジュール輸送に向けて

At California Institute of Technology (Caltech,  USA), the fiber positioners “Cobra” are assembled into a module (so-called “Cobra module”) by the teams from Caltech, NASA Jet Propulsion Laboratory (JPL) and Brazil in collaboration. As highlighted in the previous article, the first Cobra module has been assembled, tested and calibrated,  so will be shipped soon to Taiwan, where the Cobra modules will… Read more »

The first fiber positioner module was assembled / 最初のファイバー配置モジュールの組立て完了

At the laboratory of California Institute of Technology (Caltech), USA, the fiber positioner modules are being assembled by Caltech, NASA Jet Propulsion Laboratory (USA), and Laboratorio Nacional de Astrofisica (Brazil). PFS will develop 42 fiber modules for the observation, and the spare modules. We have been assembling the first module, testing it to control the 57 actuators “Cobra” in the… Read more »

The first things installed at the Subaru telescope is … / すばるに設置された一番乗りは…

The subsystems of the PFS instrument are being developed at various institutes. These subsystems will be delivered to the Subaru telescope in Hawaii from what will be finished integration and test at the laboratory. It is already one year before the first subsystem will be delivered to the Subaru telescope, and start its integration and test there. To operate the… Read more »

Meeting on data analysis software in Princeton / データ解析ソフト会議がプリンストンで開かれました

Written by  Naoki Yasuda (Kavli IPMU) The galaxies PFS will observe are more than 8 billion light years away and their brightness is less than one to a 10 million of the stars visible to naked eyes. To measure the properties of these faint galaxies accurately, we have to develop data analysis software which can deal with various kinds of noises included in the acquired… Read more »

Subaru renovated a dome floor for the PFS Spectrographs / 分光器設置室完成

In July 2017, the Spectrograph Clean Room  was finally built up on the fourth floor of the dome building at Subaru Telescope! Spectrograph Clean Room at Subaru Telescope It has been one year and a few month since the previous instrument was cleaned up from the floor, in order to accommodate four PFS spectrographs. Since then, floor has been reinforced,… Read more »

Fiber Cable: Slit Assembly of Spectrograph arrived in Marseille / ファイバーケーブル:分光器のスリット部がフランスに到着

For the PFS instrument, the lights from about 2400 astronomical objects are designed to be delivered through long fiber cable from the prime focus of the telescope to the spectrograph modules on the fourth floor in the dome building. This fiber cable subsystem, which is about 65m long in total, consists of 3 parts: (1) short cables accommodated into the… Read more »