Results 51 to 60 of about 1,170,090 (200)

Suborbital Fermi/LAT Analysis of the Brightest Gamma-Ray Flare of Blazar 3C 454.3

Galaxies, 2017
Recent detection of suborbital gamma-ray variability of Flat Spectrum Radio Quasar (FSRQ) 3C 279 by Fermi Large Area Telescope (LAT) is in severe conflict with established models of blazar emission.
Krzysztof Nalewajko
doaj   +1 more source

Persistence of blazar state in flat-spectrum radio quasars [PDF]

, 2022
Flat-spectrum radio quasars (FSRQs) whose brightness is dominated by a relativistically beamed core, are frequently found in 'blazar state' commonly inferred from a high optical polarization ( > 3%), and/or a large continuum variability.
Chand, Krishan, Gopal-Krishna
core   +1 more source

Study of the variability of blazars gamma-ray emission [PDF]

Advances in Space Research, 2011
The gamma-ray emission of blazar jets shows a pronounced variability and this feature provides limits to the size and to the speed of the emitting region. We study the gamma-ray variability of bright blazars using data from the first 18 months of activity of the Large Area Telescope on the Fermi Gamma-Ray Space Telescope. From the daily light-curves of
SBARRATO, TULLIA, Foschini, L, GHISELLINI, GABRIELE, Tavecchio, F.   +3 more
openaire   +3 more sources

Multi-Band Optical Variability of Blazar 1ES 2344+514 on Diverse Time-Scales

Journal of Advanced Research in Natural and Applied Sciences
This study presents the results of multi-band observations from 2022 to 2024 and Zwicky Transient Facility (ZTF) observations from 2018 to 2023, examining the flux variability of the blazar 1ES 2344+514 on diverse time-scales in the optical bands.
Aykut Özdönmez
doaj   +1 more source

Exercising electrocardiograms from Thoroughbred racehorses with exercise associated sudden death

Equine Veterinary Journal, EarlyView.
Abstract Background Exercise associated sudden death (EASD), defined as a fatal collapse in a closely monitored and previously presumed clinically healthy horse that occurs during exercise or within approximately 1 h after exercise, is disproportionately more common in equine than in human athletes.
Cristobal Navas de Solis, M. Durando, L. Nath, S. Durward‐Akhurst   +3 more
wiley   +1 more source

Optical Photometric Monitoring of the Blazar OT 355 and Local Standard Stars’ Calibration

Universe
OT 355 (4FGL J1734.3 + 3858) is a relatively rarely studied but highly variable, moderate-redshift (z = 0.975) flat-spectrum radio quasar (blazar). With this work, we aim to study its optical variability on different timescales, which can help us to ...
R. Bachev, Tushar Tripathi, Alok C. Gupta, A. Kurtenkov, Y. Nikolov, A. Strigachev, S. Boeva, G. Latev, B. Spassov, M. Minev, E. Ovcharov, W.-X. Yang, Yi Liu, J.-H. Fan   +13 more
doaj   +1 more source

Using a wearable electrocardiogram (ECG) patch adapted for 7‐day monitoring in the horse

Equine Veterinary Journal, EarlyView.
Abstract Background Arrhythmias can cause poor performance and sudden death in horses. Long‐term (>24 h) electrocardiogram (ECG) monitoring has been used to identify arrhythmias in humans and is superior to short‐term monitoring for transient arrhythmia detection. Televet is the current equine gold‐standard ECG device. The Cardea SOLO™ (CS) is a single‐
Tatiana Delecave Dias, Robert G. Hauser, Kendall Blanchard Cleary, Sian Durward‐Akhurst   +3 more
wiley   +1 more source

H.E.S.S. Monitoring of PKS 2155-304 in 2015 and 2016

Galaxies, 2019
PKS 2155-304 is one of the brightest blazar located in Southern Hemisphere, monitored with H.E.S.S. since the first light of the experiment. Here we report multiwavelength monitoring observations collected during the period of 2015–2016 with H.E.S.S ...
Alicja Wierzcholska, Michael Zacharias, Felix Jankowsky, Stefan Wagner, for for the H.E.S.S. Collaboration   +4 more
doaj   +1 more source

Comparative efficacy and studies of mode of action of minerals from diatoms against three species of filth flies

Medical and Veterinary Entomology, Volume 40, Issue 3, Page 478-488, September 2026.
Mortality for diatomaceous earth was observed as early as 2 h after exposure with 50% and 90% mortality at 3.5 and 4.6 h (LT50 and LT90, respectively) for Musca domestica. The LT50 and LT90 increased when the size of the fly species increased (M. domestica to Cochliomyia macellaria to Sarcophaga bullata) and increased for all three from 50 to 70 ...
Grayson L. Cave, Kaiying Chen, Steven S. Denning, David W. Watson, R. Michael Roe   +4 more
wiley   +1 more source

Patterns of variability in γ-ray blazars [PDF]

Advances in Space Research, 2009
Preliminary results of a systematic study on the simultaneous optical-to-X-rays variability in blazars are presented. Data from Swift observations of four bright gamma-ray blazars (3C 279, ON+231, S5 0716+71, PKS 2155-304) have been analyzed, compared, and discussed.
openaire   +2 more sources