Results 61 to 70 of about 804,926 (346)

Multiwavelength Observations of the Apparently Nonrepeating FRB 20250316A

open access: yesThe Astrophysical Journal
The physical origin of fast radio bursts (FRBs) remains uncertain. Although multiwavelength observations have been widely conducted, only Galactic FRB 20200428D is associated with an X-ray burst from the magnetar SGR J1935+2154.
Ye Li   +74 more
doaj   +1 more source

Identification of the optical and quiescent counterparts to the bright X-ray transient in NGC 6440 [PDF]

open access: yes, 2001
After 3 years of quiescence, the globular cluster NGC 6440 exhibited a bright transient X-ray source turning on in August 2001, as noted with the RXTE All-Sky Monitor.
Asai K.   +12 more
core   +3 more sources

Crosstalk between the ribosome quality control‐associated E3 ubiquitin ligases LTN1 and RNF10

open access: yesFEBS Letters, EarlyView.
Loss of the E3 ligase LTN1, the ubiquitin‐like modifier UFM1, or the deubiquitinating enzyme UFSP2 disrupts endoplasmic reticulum–ribosome quality control (ER‐RQC), a pathway that removes stalled ribosomes and faulty proteins. This disruption may trigger a compensatory response to ER‐RQC defects, including increased expression of the E3 ligase RNF10 ...
Yuxi Huang   +8 more
wiley   +1 more source

The Massive and Quiescent Elliptical Host Galaxy of the Repeating Fast Radio Burst FRB 20240209A

open access: yesThe Astrophysical Journal Letters
The discovery and localization of FRB 20240209A by the Canadian Hydrogen Intensity Mapping Fast Radio Burst (CHIME/FRB) experiment marks the first repeating FRB localized with the CHIME/FRB Outriggers and adds to the small sample of repeating FRBs with ...
T. Eftekhari   +41 more
doaj   +1 more source

Swift J1644+57: An Ultra-Luminous X-ray Event

open access: yes, 2012
The photon spectral energy distribution of the powerful transient Sw J1644+57 resembles those of the brightest Ultra-Luminous X-ray sources (ULXs).
Goodman   +13 more
core   +1 more source

Changing-look AGNs or short-lived radio sources? [PDF]

open access: yes, 2017
The evolution of extragalactic radio sources has been a fundamental problem in the study of active galactic nuclei for many years. A standard evolutionary model has been created based on observations of a wide range of radio sources.
Hallinan, Gregg   +3 more
core   +4 more sources

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

open access: yesFEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani   +4 more
wiley   +1 more source

The First Photometric Evidence of a Transient/Variable Source at z > 5 with JWST

open access: yesThe Astrophysical Journal
The James Webb Space Telescope (JWST) discovered 79 transients out to z ∼ 4.8 through the JADES Transient Survey (JTS), but the JTS did not find any z > 5 transients.
Christa DeCoursey   +29 more
doaj   +1 more source

A powerful bursting radio source towards the Galactic Centre

open access: yes, 2005
Transient astronomical sources are typically powered by compact objects and usually signify highly explosive or dynamic events. While radio astronomy has an impressive record of obtaining high time resolution observations, usually it is achieved in quite
ACS Readhead   +31 more
core   +1 more source

Home - About - Disclaimer - Privacy