Results 51 to 60 of about 807,144 (296)

Transient sources at the highest angular resolution

, 2015
By definition transients are sudden events, some, like supernovae, are catastrophic, while others might be due to recurrent phenomena. The aim of studying transients is to reveal the physical conditions causing them, in this sense ideal targets for ...
Massi, Maria
core   +1 more source

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Late-time Radio Flares in Tidal Disruption Events

The Astrophysical Journal
Radio monitoring unveiled late (hundreds to a thousand days) radio flares in a significant fraction of tidal disruption events. We propose that these late-time radio flares are a natural outcome if the surrounding density profile flattens outside the ...
Tatsuya Matsumoto, Tsvi Piran
doaj   +1 more source

An automated archival VLA transients survey

, 2011
In this paper we present the results of a survey for radio transients using data obtained from the Very Large Array archive. We have reduced, using a pipeline procedure, 5037 observations of the most common pointings - i.e. the calibrator fields.
B. Scheers, B. W. Stappers, Bannister, Bastian, Becker, Becker, Bell, Bhat, Bower, Bower, Bower, Bower, Bower, C. J. Law, Carilli, Cohen, Condon, Cordes, Croft, Davies, de Vries, Eck, Frail, Frail, Gaensler, Gal-Yam, Greisen, H. Spreeuw, Hodapp, Hopkins, Hyman, Hyman, Högbom, J. C. A. Miller-Jones, J. Masters, J. Swinbank, J. W. T. Hessels, Johnston, Jones, Kettenis, Kida, Kuniyoshi, Lazio, Lenc, Levinson, Lonsdale, M. E. Bell, M. W. Wise, Matsumura, McLaughlin, Niinuma, Niinuma, Ofek, R. A. M. J. Wijers, R. P. Fender, Rau, Rengelink, Stappers, Swinbank, van den Oord, Verheijen, Welch, White, White, Zhao   +64 more
core   +1 more source

X-ray outbursts of AXPs and SGRs [PDF]

, 2010
We show that the X‐ray enhancement light curves of transient AXP∕SGRs can be reproduced by the active fallback disk model. We solve the diffusion equation for the relaxation of a disk that has been pushed back by a soft gamma‐ray burst.
Caliskan, Sirin, Ertan, Unal, Ertan, Ünal, Çalışkan, Şirin   +3 more
core   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

A Possible Periodic Rotation Measure Evolution in the Repeating FRB 20220529

The Astrophysical Journal Letters
Fast radio bursts (FRBs) are mysterious millisecond-duration radio transients of extragalactic origin. Some of them repeat, while others apparently do not.
Yi-Fang Liang, Ye Li, Zhen-Fan Tang, Xuan Yang, Song-Bo Zhang, Yuan-Pei Yang, Fa-Yin Wang, Bao Wang, Di Xiao, Qing Zhao, Jun-Jie Wei, Jin-Jun Geng, Jia-Rui Niu, Jun-Shuo Zhang, Guo Chen, Min Fang, Xue-Feng Wu, Zi-Gao Dai, Wei-Wei Zhu, Peng Jiang, Bing Zhang   +20 more
doaj   +1 more source

Transient X-ray Sources in the Magellanic-type Galaxy NGC 4449

, 2016
We report the identification of seven transient X-ray sources in the nearby Magellanic-type galaxy NGC 4449 using the archival multi-epoch X-ray observations conducted with {\it Chandra}, {\it XMM-Newton} and {\it Swift} telescopes over year 2001--2013 ...
Jithesh, V., Wang, Zhongxiang
core   +1 more source

An optimal method for scheduling observations of large sky error regions for finding optical counterparts to transients [PDF]

, 2016
The discovery and subsequent study of optical counterparts to transient sources is crucial for their complete astrophysical understanding. Various gamma ray burst (GRB) detectors, and more notably the ground--based gravitational wave detectors, typically
Bhalerao, Varun, Bose, Sukanta, Gadre, Bhooshan, Rana, Javed, Singhal, Akshat   +4 more
core   +2 more sources

Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation

FEBS Letters, EarlyView.
Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz, Mihály Mérey, Rebeka Vásárhelyi, Ramóna Pék, Victor Imburchia, László Henn, Adrián Kószó, Nicholas D. Lakin, Ivan Ahel, Sébastien Huet, Ágnes Czibula, Gyula Timinszky   +11 more
wiley   +1 more source