The survey operation software system development for Prime Focus Spectrograph (PFS) on Subaru Telescope

Kavli Affiliate: Naoyuki Tamura | Summary:The Prime Focus Spectrograph (PFS) is a wide-field, multi-object spectrograph accommodating 2394 fibers to observe the sky at the prime focus of the Subaru telescope. The software system to operate a spectroscopic survey is structured by the four packages: Instrument control software, exposure targeting software, data reduction pipeline, and survey […]


Continue.. The survey operation software system development for Prime Focus Spectrograph (PFS) on Subaru Telescope

Prime Focus Spectrograph (PFS) for the Subaru Telescope: Overview, recent progress, and future perspectives

Kavli Affiliate: Naoyuki Tamura | Summary: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 […]


Continue.. Prime Focus Spectrograph (PFS) for the Subaru Telescope: Overview, recent progress, and future perspectives

Metrology Camera System of Prime Focus Spectrograph for Subaru Telescope

Kavli Affiliate: Naoyuki Tamura | Summary:The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph designed for the prime focus of the 8.2m Subaru telescope. PFS will cover a 1.3 degree diameter field with 2394 fibers to complement the imaging capabilities of Hyper SuprimeCam. To retain high throughput, the final positioning accuracy between the […]


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The Current Status of Prime Focus Instrument of Subaru Prime Focus Spectrograph

Kavli Affiliate: Naoyuki Tamura | Summary:The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph design for the prime focus of the 8.2m Subaru telescope. PFS will cover 1.3 degree diameter field with 2394 fibers to complement the imaging capability of Hyper SuprimeCam (HSC). The prime focus unit of PFS called Prime Focus Instrument […]


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Ultra-high Q Acoustic Resonance in Superfluid 4He

Kavli Affiliate: Keith Schwab | Summary:We report the measurement of the acoustic quality factor of a gram-scale, kilo-hertz frequency superfluid resonator, detected through the parametric coupling to a superconducting niobium microwave cavity. For temperature between 400mK and 50mK, we observe a $T^-4$ temperature dependence of the quality factor, consistent with a 3-phonon dissipation mechanism. We […]


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Tuning of the Charged Hadrons Multiplicities for Deep Inelastic Interactions in NEUT

Kavli Affiliate: Mark Hartz | Summary:We describe a procedure to tune the charged hadron multiplicities for deep inelastic events produced by the NEUT neutrino interaction generator. This tuning uses a model based on Koba-Nielsen-Olesen scaling, whose parameters are obtained by fitting multiplicity data from deuterium bubble chamber experiments. After tuning, the multiplicities of the events […]


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Repetitive Patterns in Rapid Optical Variations in the Nearby Black-hole Binary V404 Cygni

Kavli Affiliate: Stuart Marshall | Summary:How black holes accrete surrounding matter is a fundamental, yet unsolved question in astrophysics. It is generally believed that matter is absorbed into black holes via accretion disks, the state of which depends primarily on the mass-accretion rate. When this rate approaches the critical rate (the Eddington limit), thermal instability […]


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Critical-angle x-ray transmission grating spectrometer with extended bandpass and resolving power > 10,000

Kavli Affiliate: Mark Schattenburg | Summary:Several high priority subjects in astrophysics can be addressed by a state-of-the-art soft x-ray grating spectrometer (XGS). An Explorer-scale, large-area (> 1,000 cm2), high resolving power (R > 3,000) XGS is highly feasible based on Critical-Angle Transmission (CAT) gratings, even for telescopes with angular resolution of 5-10 arcsec. Significantly higher […]


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VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology independent supervised machine learning

Kavli Affiliate: Kevin Reil | Summary:We present the discovery and preliminary characterization of a gravitationally lensed quasar with a source redshift $z_s=2.74$ and image separation of $2.9"$ lensed by a foreground $z_l=0.40$ elliptical galaxy. Since the images of gravitationally lensed quasars are the superposition of multiple point sources and a foreground lensing galaxy, we have […]


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A graph-based algorithm for the multi-objective optimization of gene regulatory networks

Kavli Affiliate: Sander Tans | Summary:The evolution of gene regulatory networks in variable environments poses Multi-objective Optimization Problem (MOP), where the expression levels of genes must be tuned to meet the demands of each environment. When formalized in the context of monotone systems, this problem falls into a sub-class of linear MOPs. Here, the constraints […]


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