Results 111 to 120 of about 669,031 (383)
A 3% SOLUTION: DETERMINATION OF THE HUBBLE CONSTANT WITH THE HUBBLE SPACE TELESCOPE AND WIDE FIELD CAMERA 3 [PDF]
, 2011 We use the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) to determine the Hubble constant from optical and infrared observations of over 600 Cepheid variables in the host galaxies of eight recent Type Ia supernovae (SNe Ia), providing ...
A. Riess +8 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.A materials and device design concept that comprises a self‐assembled ultra‐thin epitaxial ion‐transporting layer, an amorphous oxide overcoat oxygen‐blocking layer, and a partial filament formed during an electroforming step is proposed for low‐current multilevel resistive switching devices.
Ming Xiao +17 more
wiley +1 more source
Monte Carlo Studies of medium-size telescope designs for the Cherenkov Telescope Array [PDF]
, 2015 We present studies for optimizing the next generation of ground-based imaging atmospheric Cherenkov telescopes (IACTs). Results focus on mid-sized telescopes (MSTs) for CTA, detecting very high energy gamma rays in the energy range from a few hundred GeV to a few tens of TeV.
arxiv +1 more source
The Influence of On-Orbit Micro-Vibration on Space Gravitational Wave Detection
Photonics, 2023 Large-aperture space telescopes have played an important role in space gravitational wave detection missions. Overcoming the influence of the space environment on interstellar laser distance measurement and realistic high-concentration laser distance ...
Zhiwei Chen +4 more
doaj +1 more source
Fermi Large Area Telescope Third Source Catalog [PDF]
, 2015 We present the third Fermi Large Area Telescope (LAT) source catalog (3FGL) of sources in the 100MeV– 300 GeV range. Based on the first 4 yr of science data from the Fermi Gamma-ray Space Telescope mission, it is the deepest yet in this energy range ...
The Fermi-LAT Collaboration
semanticscholar +1 more source
Building a CCD Spectrograph for Educational or Amateur Astronomy
, 2002 We discuss the design of an inexpensive, high-throughput CCD spectrograph for a small telescope. By using optical fibers to carry the light from the telescope focus to a table-top spectrograph, one can minimize the weight carried by the telescope and ...
Charles B. Hughes +4 more
core +1 more source
Advanced Functional Materials, EarlyView.The oxygen spillover from Ir to the oxide support with interfacial oxygen vacancies during OER is revealed. These interfacial oxygen vacancies as an oxygen transport zone not only regulate the in situ Ir catalytic structure toward boosted activity but also suppress Ir over‐oxidation via directional OH‐filling effects, thereby ensuring overall high ...
Yu Zhu +11 more
wiley +1 more source
How to focus a Cherenkov telescope [PDF]
J.Phys.G27:933,2001, 2001 Cherenkov telescopes image the Cherenkov emission from air showers. A priori, it is not obvious if the `best' images are achieved by measuring Cherenkov photon angles, i.e. focusing the telescope at infinity, or by considering the air shower as an object to be imaged, in which case one might focus the telescope on the central region of the shower.
arxiv +1 more source
Structure of distributed control system in Seimei telescope
SICE Journal of Control, Measurement, and System Integration, 2021 A segmented mirror control system is indispensable for operating an astronomical telescope which is equipped with a segmented primary mirror. In this study, we focus on the distributed control system (DCS) proposed for Seimei telescope.
Ichiro Jikuya +4 more
doaj +1 more source
Overview to the Hard X-ray Modulation Telescope (Insight-HXMT) Satellite [PDF]
Science China Physics Mechanics and Astronomy, 2019 As China’s first X-ray astronomical satellite, the Hard X-ray Modulation Telescope (HXMT), which was dubbed as Insight-HXMT after the launch on June 15, 2017, is a wide-band (1-250 keV) slat-collimator-based X-ray astronomy satellite with the capability ...
S. Zhang +118 more
semanticscholar +1 more source