Author Archives: PFS Project

Make the instrument more robust to long-term operation

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Most of the PFS instruments have been delivered to Subaru Telescope on the top of Mt. Maunakea in Hawaii and been installed there. However, in order to run the instruments for the coming 10 years or even longer, we cannot simply say it’s done once delivered and assembled — it is essential to run the instruments stably for such a… Read more »

PFS science working group co-chair meeting at Tufts University

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The PFS project is in its final stage of hardware delivery and approaching such a critical phase as the start of scientific operation. Under this circumstance, a meeting of the science working groups took place at Tufts University near Boston, USA from August 30 to September 1, 2023. In this meeting, the representatives (co-chairs) from each working group shared the… Read more »

Engineering observation in July 2023

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About a half-month after the second near-infrared camera was integrated, we conducted the engineering observation late July 2023. The members from Kavli IPMU, Princeton University, Academia Sinica, Institute of Astronomy and Astrophysics (ASIAA, Taiwan) and , National Astronomical Observatory of Japan joined the observations at Subaru telescope on the Maunakea summit, in the remote observation rooms, or via zoom. Following… Read more »

Two spectrograph modules are now equipped with full channels

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Development of spectrograph modules has been in progress to complete PFS instrument. Spectrograph modules are being developed by Laboratoire d’Astrophysique de Marseille, Johns Hopkins University (JHU), Princeton University, Brazilian consortium in collaboration with Bertin Winlight. Although there have been many issues found during integration and test, we the team has been discussing one by one and solve them, to complete… Read more »

Installation of the PFS fiber cable was completed!

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We achieved one milestone in early June 2023. The installation of all the fiber cables has been completed finally! Among the PFS instruments, the fiber cable system, which consists of about 2400 optical fibers, delivers the light from the prime focus of the Subaru telescope to the Spectrograph Modules. The fiber cables are assembled into four units, each of which… Read more »

We conducted Engineering Observation

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A few weeks after we integrated the first near infrared camera at the Subaru telescope, we carried out the engineering observation from 20 April to 2 May 2023. The observation took about two weeks. Over that long period, we conducted numerous tests and development. The most important achievement was that we succeeded in taking on-sky data using the near infrared… Read more »

The first Near-Infrared camera was installed at Subaru telescope

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A new milestone for PFS was reached in late March 2023 when the first Near-Infrared (NIR) camera was successfully delivered from Johns Hopkins University and installed at Subaru telescope. As its name suggests, this camera covers the NIR spectral band of the spectrographs (940-1260nm), in addition to the blue and red cameras. In total 4 NIR cameras will be delivered… Read more »

PFS Science meeting was held.

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In parallel to the instrument development, the PFS project has been developing hard the science using it. We had the PFS science meeting in early March 2023 at Kavli IPMU (Japan), in the hybrid format with zoom. The PFS science team has been developing a huge survey plan to observe enormous numbers of galaxies and stars in order to study… Read more »

The third fiber cable was installed on Subaru Telescope

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Time flies: it has been a few months since the last article. In the last a few months, the integration of the PFS Spectrograph Modules (SMs) and cameras has been proceeding at LAM and JHU. At Subaru Telescope, the second SM (SM3) experienced the first light in the engineering run in November 2022 just after shipping. However, the two successive… Read more »

Second Spectrograph Module was delivered to Subaru Telescope

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This article reports the third milestones we achieved in September 2022. We shipped the second Spectrograph Module to Subaru Telescope in Hawaii! PFS utilizes 4 Spectrograph to observe about 2400 celestial objects simultanaously. Spectrograph system is being developed and integrated under the collaboration of Laboratoire d’Astrophysique de Marseille (LAM), Johns Hopkins University, Princeton University, Laboratório Nacional de Astrofísica, and one… Read more »