FLEX is a grid-based fiber positioner design achieving up to 22.5 mm patrol radius and under 0.39 deg telecentric error for 30,000+ fiber multiplexing on telescopes like WST.
Prime Focus Spectrograph (PFS) for the Subaru Telescope: Overview, recent progress, and future perspectives
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abstract
PFS (Prime Focus Spectrograph), a next generation facility instrument on the 8.2-meter Subaru Telescope, is a very wide-field, massively multiplexed, optical and near-infrared spectrograph. Exploiting the Subaru prime focus, 2394 reconfigurable fibers will be distributed over the 1.3 deg field of view. The spectrograph has been designed with 3 arms of blue, red, and near-infrared cameras to simultaneously observe spectra from 380nm to 1260nm in one exposure at a resolution of ~1.6-2.7A. An international collaboration is developing this instrument under the initiative of Kavli IPMU. The project is now going into the construction phase aiming at undertaking system integration in 2017-2018 and subsequently carrying out engineering operations in 2018-2019. This article gives an overview of the instrument, current project status and future paths forward.
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Semi-analytical calculation of void-galaxy cross-correlation multipoles in Hu-Sawicki f(R) gravity reveals size-dependent deviations from LambdaCDM up to 29.7 percent for small voids, amplified by nonlinear evolution and potentially observable in Stage-IV surveys.
N-body simulation of a major merger shows M31's extended rotating stellar disc as a stretched and warped remnant of the progenitor disc extending beyond 40 kpc.
Spectroscopic survey of outer ω Centauri fields confirms 157 members with 93% success rate and traces tidal tails to 3.2 deg, showing kinematic and metallicity continuity with the cluster and Fimbulthul stream.
MUST is a new 6.5 m telescope designed to deliver simultaneous optical spectra for over 20,000 targets across a 5 deg² field, enabling the largest 3D spectroscopic map of the Universe with redshifts for more than 100 million objects over an 8-year survey.
Non-detection of TDE in IC230724A; LSST could constrain TDE fraction of neutrino background to ≲60% or ≳30% with 10 events.
The CosmoVerse White Paper compiles observational tensions in cosmology and maps strategies using improved systematics checks and tests of fundamental physics to resolve them.
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Deep Optical Follow-up Observations to IceCube Cosmic Neutrinos: a case for IC230724A with Subaru/HSC and prospects with Rubin/LSST
Non-detection of TDE in IC230724A; LSST could constrain TDE fraction of neutrino background to ≲60% or ≳30% with 10 events.