Tag Archives: Spectrograph

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 »

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 »

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 »

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 »

The first near-infrared camera has arrived at LAM!

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We PFS project reached many milestones in September 2022. We are going to report them in the coming articles. First of all, finally, the first near-infrared camera has been shipped from Johns Hopkins University (JHU, USA) to Laboratoire d’Astrophysique de Marseille (LAM, France)!! PFS Spectrograph equips three cameras, two visible cameras (blue and red) and one near-infrared camera, and takes… Read more »

News about activities of Spectrograph integration

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At Laboratoire d’Astrophysique de Marseille (LAM), integration of the second and the third Spectrograph Modules is on-going. We are talking about the recent activities in this post. PFS project is developing four spectrograph modules to observe about 2400 objects simultaneously. We designed the system for each module to evenly cover the field of view on the telescope’s prime focal plane… Read more »

SpS development is progressing

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This post shows recent activities for the development of the PFS Spectrograph modules. PFS project develops 4 identical Spectrograph Modules to obtain 2400 spectra in a singe exposure. Integration of the second and third Spectrograph Modules are on-going at Laboratoire d’Astrophysique de Marseille (LAM) in France. As shown in the previous post, almost all units and assemblies had been delivered… Read more »

Optics for the 3rd Spectrograph Module were delivered.

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We have a news from Marseilles in France in the middle of summer. PFS uses 4 identical spectrograph modules to obtain about 2400 spectra from astronomical objects. Development of the spectrograph modules are led by Laboratoire d’Astrophysique de Marseille (LAM), and production of the optical systems such as lenses are going on by their partner, Winlight.Two sets of the PFS… Read more »

Assemble of the first Near-Infrared Camera Unit

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The topic of this post is the development of the Near-Infrared Camera Units at Johns Hopkins University. Each Spectrograph module of the PFS project equips three cameras — visible-blue, visible-red and near-infrared — to take spectra whose wavelength ranges from 380 nm to 1260 nm with a single shot. Johns Hopkins University (JHU) and Princeton University (PU) in the United… Read more »

The first Spectrograph Module was re-assembled at Subaru Telescope

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Earlier we reported that one of the PFS instruments, the first Spectrograph Module was shipped to Hawaii Observatory, National Astronomical Observatory of Japan in Hawaii (see here). More recently, the module has been transported to Subaru Telescope at the summit of Maunakea, and re-assembled there. PFS Spectrograph Module consists of ten and several assemblies such as camera units, grating assemblies,… Read more »