Prime Focus Spectrograph for the Subaru telescope: massively multiplexed optical and near-infrared fiber spectrograph

Abstract

The Prime Focus Spectrograph (PFS) is an optical/near-infrared multifiber spectrograph with 2394 science fibers distributed across a 1.3-deg diameter field of view at the Subaru 8.2-m telescope. The wide wavelength coverage from 0.38 μm to 1.26 μm, with a resolving power of 3000, simultaneously strengthens its ability to target three main survey programs: cosmology, galactic archaeology and galaxy/AGN evolution. A medium resolution mode with a resolving power of 5000 for 0.71 μm to 0.89 μm will also be available by simply exchanging dispersers. We highlight some of the technological aspects of the design. To transform the telescope focal ratio, a broad-band coated microlens is glued to each fiber tip. A higher transmission fiber is selected for the longest part of the cable system, optimizing overall throughput; a fiber with low focal ratio degradation is selected for the fiber-positioner and fiber-slit components, minimizing the effects of fiber movements and fiber bending. Fiber positioning will be performed by a positioner consisting of two stages of piezo-electric rotary motors. The positions of these motors are measured by taking an image of artificially back-illuminated fibers with the metrology camera located in the Cassegrain container; the fibers are placed in the proper location by iteratively measuring and then adjusting the positions of the motors. Target light reaches one of the four identical fast-Schmidt spectrograph modules, each with three arms. The PFS project has passed several project-wide design reviews and is now in the construction phase.

19 pages, 11 figures

References in corpus (18)

• Developing Engineering Model Cobra fiber positioners for the Subaru Telescope Prime Focus Spectrometer
• The metrology cameras for Subaru PFS and FMOS
• Prime Focus Spectrograph - Subaru's future -
• Fiber Optical Cable and Connector System (FOCCoS) for PFS/Subaru
• Multi-fibers connectors systems for FOCCoS-PFS-Subaru
• Optical Design of the SuMIRe PFS Spectrograph
• The near infrared camera for the Subaru Prime Focus Spectrograph
• Studying focal ratio degradation of optical fibers for Subaru Prime Focus Spectrograph
• FOCCoS for Subaru PFS
• Volume phase holographic gratings for the Subaru Prime Focus Spectrograph: performance measurements of the prototype grating set
• Prime Focus Instrument of Prime Focus Spectrograph for Subaru Telescope
• Progress with the Prime Focus Spectrograph for the Subaru Telescope: a massively multiplexed optical and near-infrared fiber spectrograph
• Metrology Camera System of Prime Focus Spectrograph for Subaru Telescope
• Current status of the Spectrograph System for the SuMIRe/PFS
• Focal Plane Alignment and Detector Characterization for the Subaru Prime Focus Spectrograph
• Polish device for FOCCoS/PFS slit system
• CCD Readout Electronics for the Subaru Prime Focus Spectrograph
• Slit device for FOCCoS, PFS, Subaru

Cited by in corpus (6)

• The GALAH Survey: Observational Overview and Gaia DR1 companion
• SDSS-V Algorithms: Fast, Collision-Free Trajectory Planning for Heavily Overlapping Robotic Fiber Positioners
• A modified method for determining the FRD and length properties of optical fibres in astronomy
• Focal ratio degradation for fiber positioner operation in astronomical spectrographs
• DEEM, a versatile platform of FRD measurement for highly multiplexed fibre systems in astronomy
• The Infrared Imaging Spectrograph (IRIS) for TMT: motion planning with collision avoidance for the on-instrument wavefront sensors