Results 81 to 90 of about 11,793 (207)
A Study of Real-time Detection Methods for Solar Radio Burst Identification
The Astrophysical Journal Supplement SeriesSolar flares, coronal mass ejections, and other solar radio burst phenomena release substantial amounts of solar radiation energy, resulting in adverse space weather conditions and posing significant hazards in space. Spectrum analysis conducted manually
YongLin Yu +6 more
doaj +1 more source
Distance to Orion KL Measured with VERA
, 2007 We present the initial results of multi-epoch VLBI observations of the 22 GHz H2O masers in the Orion KL region with VERA (VLBI Exploration of Radio Astrometry).
Bushimata, Takeshi +36 more
core +1 more source
Deep LOFAR 150 MHz imaging of the Bo\"otes field: Unveiling the faint low-frequency sky [PDF]
, 2018 We have conducted a deep survey (with a central rms of $55\mu\textrm{Jy}$) with the LOw Frequency ARray (LOFAR) at 120-168 MHz of the Bo\"otes field, with an angular resolution of $3.98^{''}\times6.45^{''}$, and obtained a sample of 10091 radio sources ($
Best, P. N. +7 more
core +3 more sources
Not So Fast: A New Catalog of Meteor Persistent Trains
Journal of Geophysical Research: Space Physics, Volume 129, Issue 7, July 2024.Abstract This paper presents the results of a nearly 2‐year long campaign to detect and analyze meteor persistent trains (PTs)—self‐emitting phenomena which can linger up to an hour after their parent meteor. The modern understanding of PTs has been primarily developed from the Leonid storms at the turn of the century; our goal was to assess the ...
L. E. Cordonnier +4 more
wiley +1 more source
The Astrophysical JournalThe millisecond pulsar J1713+0747 underwent a sudden and significant pulse shape change between 2021 April 16 and 17 (MJDs 59320 and 59321). Subsequently, the pulse shape gradually recovered over the course of several months.
Ross J. Jennings +43 more
doaj +1 more source
Discovery of a wandering radio jet base after a large X-ray flare in the blazar Markarian 421
, 2015 We investigate the location of the radio jet bases ("radio cores") of blazars in radio images, and their stationarity by means of dense very long baseline interferometry (VLBI) observations.
Doi, A. +5 more
core +1 more source
The fireball of November 24, 1970, as the most probable source of the Ischgl meteorite
Meteoritics &Planetary Science, Volume 59, Issue 7, Page 1658-1691, July 2024.Abstract The discovery of the Ischgl meteorite unfolded in a captivating manner. In June 1976, a pristine meteorite stone weighing approximately 1 kg, fully covered with a fresh black fusion crust, was collected on a mountain road in the high‐altitude Alpine environment.
Maria Gritsevich +15 more
wiley +1 more source
Confirmation of two extended objects along the line of sight to PKS1830-211 with ESO-VLT adaptive optics imaging [PDF]
, 2005 We report on new high-resolution near-infrared images of the gravitationally lensed radio source PKS1830-211, a quasar at z=2.507. These adaptive optics observations, taken with the Very Large Telescope (VLT), are further improved through image ...
C. Lidman +15 more
core +1 more source
Cross‐Polarization Gain Calibration of Linearly Polarized VLBI Antennas by Observations of 4C 39.25
Radio Science, Volume 59, Issue 4, April 2024.Abstract Radio telescopes with dual linearly polarized feeds regularly participate in Very Long Baseline Interferometry. One example is the VLBI Global Observing System (VGOS), which is employed for high‐precision geodesy and astrometry. In order to achieve the maximum signal‐to‐noise ratio, the visibilities of all four polarization products are ...
F. Jaron +14 more
wiley +1 more source
Synthesis Imaging with a Lunar Orbit Array. II. Impacts of Instrument-induced Phase Errors
The Astronomical JournalA lunar orbit interferometer array suffers from a number of systematics. Beyond systematics induced by the imaging algorithm itself and thermal noise considered in F.
Meng Zhou +4 more
doaj +1 more source