Very long baseline interferometry

Results 141 to 150 of about 56,169 (259)

Proposed satellite laser ranging and very long baseline interferometry sites for crustal dynamics investigations [PDF]

Recommendations are presented for a global network of 125 sites for geodetic measurements by satellite laser ranging and very long baseline interferometry. The sites were proposed on the basis of existing facilities and scientific value for investigation
Allenby, R. J., Frey, H. V., Lowman, P. D. +2 more
core +1 more source

Monitor and control equipment for the MV-3 mobile very long baseline interferometry station [PDF]

The system, designed around a commercially available process controller, is described. The hardware design, selection of the process control equipment, the design of the interface to other systems, and the analog monitor and process control assembly used
Sniffin, R. W.
core +1 more source

Accessing a New Population of Supermassive Black Holes with Extensions to the Event Horizon Telescope

The Astrophysical Journal
The Event Horizon Telescope (EHT) has produced resolved images of the supermassive black holes (SMBHs) Sgr A* and M87*, which present the largest shadows on the sky.
Xinyue Alice Zhang +8 more
doaj +1 more source

Implications of very long baseline interferometry measurements on North American intra-plate crustal deformation [PDF]

Very Long Baseline Interferometry experiments over the last 1-3/4 years between Owens Valley, CA and Haystack, MA Radio Observatories suggest an upper limit of east-west crustal deformation between the two sites of about 1 cm/yr. In view of the fact that
Allenby, R. J.
core +1 more source

CHIME/FRB Discovery and Localization of the Swift-observed FRB 20241228A

The Astrophysical Journal
On 2024 December 28, the Canadian Hydrogen Intensity Mapping Experiment (CHIME) FRB project detected the thus-far nonrepeating FRB 20241228A with a real-time signal-to-noise ratio of >50.
Alice P. Curtin +28 more
doaj +1 more source

A Very Long Baseline Interferometry Calibrator Grid at 600 MHz for Fast Radio Transient Localizations with CHIME/FRB Outriggers

The Astrophysical Journal
The Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project has a new very long baseline interferometry (VLBI) Outrigger at the Green Bank Observatory (GBO), which forms a 3300 km baseline with CHIME operating at 400–800 MHz ...
Shion Andrew +18 more
doaj +1 more source

First Sagittarius A* Event Horizon Telescope Results. VII. Polarization of the Ring

The Astrophysical Journal Letters
The Event Horizon Telescope observed the horizon-scale synchrotron emission region around the Galactic center supermassive black hole, Sagittarius A* (Sgr A*), in 2017. These observations revealed a bright, thick ring morphology with a diameter of 51.8 ±
The Event Horizon Telescope Collaboration +285 more
doaj +1 more source

The L-/C-band feed design for the DSS 14 70-meter antenna (Phobos mission) [PDF]

A dual-frequency (1.668 and 5.01 GHz) feed was designed for the Deep Space Station (DSS) 14 70-m antenna to support the Soviet Phobos Mission. This antenna system was capable of supporting telemetry, two-way Doppler, and very long baseline interferometry
Reilly, H. F., Jr., Stanton, P. H.
core +1 more source

The International Celestial Reference Frame as Realized by Very Long Baseline Interferometry

, 1998
Chopo Ma +8 more
semanticscholar +1 more source

Multifrequency Very Long Baseline Interferometry Imaging of the Subparsec-scale Jet in the Sombrero Galaxy (M104)

The Astrophysical Journal
We report multifrequency and multiepoch very long baseline interferometry studies of the subparsec jet in the Sombrero galaxy (M104, NGC 4594). Using Very Long Baseline Array data at 12, 22, 44, and 88 GHz, we study the kinematics of the jet and the ...
Xi Yan +5 more
doaj +1 more source

engineering
supermassive black holes
geology

active galactic nuclei
computer science
environmental science

interferometry
radio interferometry
radio astrometry