Tag Archives: Spectrograph

The 1st blue camera cryostat was delivered in Marseille

PFS Project 2018-01-19 No Comments

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 »

Subaru renovated a dome floor for the PFS Spectrographs

PFS Project 2017-10-04 No Comments

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

PFS Project 2017-08-23 No Comments

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 »

Joint Work for Spectrograph Development at LAM

PFS Project 2017-07-10 No Comments

At Laboratoire d’Astrophysique de Marseille (LAM), PFS Spectrograph Module (SM) is fully integrated and its performance is validated. As a part of these processes, two visible-red camera units are being tested; one is for thermal performance test and the other is for optical performance test. From 19th to 29th June, we got together at LAM and dedicated ourselves to joint… Read more »

Commissioning of IR detector at JHU

PFS Project 2017-05-03 No Comments

PFS is a spectrometer that disperses light and measures the intensity as a function of wavelength using photosensitive detectors. The operational bandpass for the PFS instrument covers the wavelengths from 380nm to 1260nm. The light delivered to the spectrograph is initially separated into three channels of blue, red, and near-infrared (NIR) by two dichroic mirrors. Each channel is deflected to… Read more »

Spectrograph Integration & Test at LAM

PFS Project 2017-04-04 No Comments

Among the PFS instrument subsystem, four spectrographs are developed under the leadership of LAM (Laboratoire d’Astrophysique de Marseille). Since 2015, the first spectrograph module has been integrated and tested for its performance. In this article, we’ll talk about integration and test activities at LAM. Below photo shows the Visible-Red camera unit under assembly: optical components were accommodated in the cryostat… Read more »

Installation of Spectrographs Clean Room Crane

PFS Project 2017-02-06 No Comments

The integration of the Spectrographs Clean Room has been progressing at the Subaru Telescope observatory since last May, when the floor of the dome building was cleaned up. Recently, a crane has been installed to the ceiling structure of the spectrograph floor. This 500kg-capacity crane will be used to carry the individual components and sub-assemblies of the spectrograph module such… Read more »

First light at lab.!

PFS Project 2017-01-10 No Comments

The PFS Spectrographs are integrated and validated their performances at Laboratoire d’Astrophysique de Marseille (LAM), France. At present, the first spectroraph module is being assembled, tested for the performance of individual parts. Last month, we had the First Light of the visible-red camera in the laboratory. The below is the first light image, in which you can see many spectra… Read more »

Renovation for the PFS spectrograph system

PFS Project 2016-07-25 No Comments

The PFS spectrograph system, consisting of four identical modules, will be accommodated in a designated clean room on the fourth floor of the Subaru telescope enclosure building. Envisioning the delivery of the first modules in 2017, we have been developing the design and implementation plan of the floor and clean room. After we had a design review meeting in August… Read more »

Updates on Integration and Test of Spectrographs

PFS Project 2016-02-22 No Comments

From David Le Mignant (LAM) As of early 2016, several PFS spectrograph activities are on-going in parallel in France, led by Laboratoire d’Astrophysique de Marseille (LAM) with the support from the other PFS members. Among them, two major items are: 1) the thermal validation for the Visible Camera Unit: Since last year we have been undertaking this validation process (https://pfs.ipmu.jp/blog/2015/11/p124)…. Read more »