Hitomi constraints on the 3.5 keV line in the Perseus galaxy cluster

Kavli Affiliate: Grzegorz M. Madejski | First 5 Authors: Hitomi Collaboration, Felix A. Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steven W. Allen | Summary: High-resolution X-ray spectroscopy with Hitomi was expected to resolve the origin of the faint unidentified E=3.5 keV emission line reported in several low-resolution studies of various massive systems, such as galaxies and […]


Continue.. Hitomi constraints on the 3.5 keV line in the Perseus galaxy cluster

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

Kavli Affiliate: Stuart L. Marshall | First 5 Authors: Mariko Kimura, Keisuke Isogai, Taichi Kato, Yoshihiro Ueda, Satoshi Nakahira | 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 […]


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

Ground Testing and Flight Demonstration of Charge Management of Insulated Test Masses Using UV LED Electron Photoemission

Kavli Affiliate: Robert Byer | First 5 Authors: Shailendhar Saraf, Sasha Buchman, Karthik Balakrishnan, Chin Yang Lui, Michael Soulage | Summary: The UV LED mission demonstrates the precise control of the potential of electrically isolated test masses that is essential for the operation of space accelerometers and drag free sensors. Accelerometers and drag free sensors […]


Continue.. Ground Testing and Flight Demonstration of Charge Management of Insulated Test Masses Using UV LED Electron Photoemission

Ultrastable frequency reference at 1.56 μm using a CO molecular overtone transition with the noise immune cavity-enhanced optical heterodyne molecular spectroscopy method

Kavli Affiliate: Robert Byer | First 5 Authors: Shailendar Saraf, Paul Berceau, Alberto Stochino, Robert Byer, John Lipa | Summary: We report on an ultrastable molecular clock based on the interrogation of the 3{nu} rotational-vibrational combination band at 1563nm of carbon monoxide 12C16O. The laser stabilization scheme is based on frequency modulation (FM) saturation spectroscopy […]


Continue.. Ultrastable frequency reference at 1.56 μm using a CO molecular overtone transition with the noise immune cavity-enhanced optical heterodyne molecular spectroscopy method

GREAT3 results I: systematic errors in shear estimation and the impact of real galaxy morphology

Kavli Affiliate: Philip J. Marshall | First 5 Authors: Rachel Mandelbaum, Barnaby Rowe, Robert Armstrong, Deborah Bard, Emmanuel Bertin | Summary: We present first results from the third GRavitational lEnsing Accuracy Testing (GREAT3) challenge, the third in a sequence of challenges for testing methods of inferring weak gravitational lensing shear distortions from simulated galaxy images. […]


Continue.. GREAT3 results I: systematic errors in shear estimation and the impact of real galaxy morphology

A framework for modeling the detailed optical response of thick, multiple segment, large format sensors for precision astronomy applications

Kavli Affiliate: Steven Kahn | First 5 Authors: Andrew Rasmussen, Pierre Antilogus, Pierre Astier, Chuck Claver, Peter Doherty | Summary: Near-future astronomical survey experiments, such as LSST, possess system requirements of unprecedented fidelity that span photometry, astrometry and shape transfer. Some of these requirements flow directly to the array of science imaging sensors at the […]


Continue.. A framework for modeling the detailed optical response of thick, multiple segment, large format sensors for precision astronomy applications

The Heavy Photon Search Test Detector

Kavli Affiliate: Homer Neal | First 5 Authors: Marco Battaglieri, Sergey Boyarinov, Stephen Bueltmann, Volker Burkert, Andrea Celentano | Summary: The Heavy Photon Search (HPS), an experiment to search for a hidden sector photon in fixed target electroproduction, is preparing for installation at the Thomas Jefferson National Accelerator Facility (JLab) in the Fall of 2014. […]


Continue.. The Heavy Photon Search Test Detector

Performance of an LPD prototype detector at MHz frame rates under Synchrotron and FEL radiation

Kavli Affiliate: Sven C. Herrmann | First 5 Authors: Andreas Koch, Matthew Hart, Tim Nicholls, Christian Angelsen, John Coughlan | Summary: A MHz frame rate X-ray area detector (LPD – Large Pixel Detector) is under development by the Rutherford Appleton Laboratory for the European XFEL. The detector will have 1 million pixels and allows analogue […]


Continue.. Performance of an LPD prototype detector at MHz frame rates under Synchrotron and FEL radiation

The Third Gravitational Lensing Accuracy Testing (GREAT3) Challenge Handbook

Kavli Affiliate: Aaron Roodman | First 5 Authors: Rachel Mandelbaum, Barnaby Rowe, James Bosch, Chihway Chang, Frederic Courbin | Summary: The GRavitational lEnsing Accuracy Testing 3 (GREAT3) challenge is the third in a series of image analysis challenges, with a goal of testing and facilitating the development of methods for analyzing astronomical images that will […]


Continue.. The Third Gravitational Lensing Accuracy Testing (GREAT3) Challenge Handbook

Single-Pass GPU-Raycasting for Structured Adaptive Mesh Refinement Data

Kavli Affiliate: Ralf Kaehler | First 5 Authors: Ralf Kaehler, Tom Abel, , , | Summary: Structured Adaptive Mesh Refinement (SAMR) is a popular numerical technique to study processes with high spatial and temporal dynamic range. It reduces computational requirements by adapting the lattice on which the underlying differential equations are solved to most efficiently […]


Continue.. Single-Pass GPU-Raycasting for Structured Adaptive Mesh Refinement Data