Results 121 to 130 of about 56,169 (259)

The European VLBI network [PDF]

open access: yes
The capabilities of the European very long baseline interferometry (VLBI) network are summarized. The range of baseline parameters, sensitivities, and recording and other equipment available are included.
Schilizzi, R. T.
core   +1 more source

A Geodetic and Astrometric VLBI Experiment at 22/43/88/132 GHz

open access: yesThe Astronomical Journal
Extending geodetic and astrometric Very Long Baseline Interferometry (VLBI) observations from traditional centimeter wavebands to millimeter wavebands offers numerous scientific potentials and benefits. However, it was considered quite challenging due to
Shuangjing Xu   +16 more
doaj   +1 more source

A Repeating Fast Radio Burst Source in the Outskirts of a Quiescent Galaxy

open access: yesThe Astrophysical Journal Letters
We report the discovery of the repeating fast radio burst (FRB) source FRB 20240209A using the Canadian Hydrogen Intensity Mapping Experiment (CHIME)/FRB telescope.
Vishwangi Shah   +48 more
doaj   +1 more source

Long baseline vector determinations and intercomparisons [PDF]

open access: yes
The East Coast very long baseline interferometry (VLBI) group has performed about 60 experiments over the last 10 years in the process of developing and exploiting advanced VLBI techniques.
Knight, C. A.
core   +1 more source

Astronomical tests for quantum black hole structure

open access: yes, 2017
Quantum modifications to black holes on scales comparable to the horizon size, or even more radical physics, are apparently needed to reconcile the existence of black holes with the principles of quantum mechanics.
Giddings, Steven B.
core   +1 more source

Bayesian Constraints on the Ring Ellipticity of M87* 2017 Using Themis

open access: yesThe Astrophysical Journal
Measuring the properties of black hole images has the potential to constrain deviations from general relativity on horizon scales. Of particular interest is the ellipticity of the ring that is sensitive to the underlying spacetime.
Paul Tiede, Avery E. Broderick
doaj   +1 more source

Spacecraft-spacecraft very long baseline interferometry. Part 1: Error modeling and observable accuracy [PDF]

open access: yes
In Part 1 of this two-part article, an error budget is presented for Earth-based delta differential one-way range (delta DOR) measurements between two spacecraft.
Border, J. S., Edwards, C. D., Jr.
core   +1 more source

Very-Long-Baseline Interferometry [PDF]

open access: yes, 2017
A. Richard Thompson   +2 more
openaire   +1 more source

Analyses of celestial pole offsets with VLBI, LLR, and optical observations

open access: yes, 2019
This work aims to explore the possibilities of determining the long-period part of the precession-nutation of the Earth with techniques other than very long baseline interferometry (VLBI).
Cheng, Yu-Ting, Liu, Jia-Cheng, Zhu, Zi
core   +1 more source

Home - About - Disclaimer - Privacy