Results 91 to 100 of about 2,078,750 (288)

EP241021a: A Months-duration X-Ray Transient with Luminous Optical and Radio Emission

The Astrophysical Journal Letters
We present the discovery of a peculiar X-ray transient, EP241021a, by the Einstein Probe (EP) mission and the results from multiwavelength follow-up observations.
Xinwen Shu, Lei Yang, Haonan Yang, Fan Xu, Jin-Hong Chen, Rob A. J. Eyles-Ferris, Lixin Dai, Yunwei Yu, Rong-Feng Shen, Luming Sun, Hucheng Ding, WeiKang Zheng, Ning Jiang, Wenxiong Li, Ning-Chen Sun, Dong Xu, Zhumao Zhang, Chichuan Jin, Arne Rau, Tinggui Wang, Xue-feng Wu, Weimin Yuan, Bing Zhang, Kirpal Nandra, Alexei V. Filippenko, Frédérick Poidevin, Roberto Soria, Amit Kumar, David S. Aguado, Fangxia An, Tao An, Jie An, Moira Andrews, Rungrit Anutarawiramkul, Pietro Baldini, Thomas G. Brink, Pathompong Butpan, Zhiming Cai, Alberto J. Castro-Tirado, Huaqing Cheng, Weiwei Cui, Joseph Farah, Shaoyu Fu, Johan P.U. Fynbo, Xing Gao, Dawei Han, Xuhui Han, D. Andrew Howell, Jingwei Hu, Shuaiqing Jiang, Brajesh Kumar, Weihua Lei, Dongyue Li, Chengkui Li, Huaqiu Liu, Xing Liu, Yuan Liu, Xiaowei Liu, Alicia López-Oramas, David López Fernández-Nespral, Justyn R. Maund, Curtis McCully, Zexi Niu, Megan Newsome, Paul O’Brien, Haiwu Pan, Yu Pan, Estefania Padilla Gonzalez, Ismael Pérez-Fournon, Walter Silima, Hui Sun, Shengli Sun, Xiaojin Sun, Giacomo Terreran, Samaporn Tinyanont, Junxian Wang, Yanan Wang, Yun Wang, Klaas Wiersema, Yunfei Xu, Yongquan Xue, Yi Yang, Fabao Zhang, Juan Zhang, Pinpin Zhang, Wenda Zhang, Yonghe Zhang, Haisheng Zhao, Zipei Zhu, Liping Xin, Zhuheng Yao, Bertrand Cordier, Jianyan Wei, Yulei Qiu, Frédéric Daigne   +94 more
doaj   +1 more source

Demography of obscured and unobscured AGN: prospects for a Wide Field X-ray Telescope

, 2010
We discuss some of the main open issues in the evolution of Active Galactic Nuclei which can be solved by the sensitive, wide area surveys to be performed by the proposed Wide Field X-ray Telescope mission.Comment: Proceedings of "The Wide Field X-ray ...
A. Comastri, C. Vignali, E. Lusso, F. Marulli, M. Brusa, P. Rosati, P. Tozzi, PAOLILLO, MAURIZIO, R. Gilli, S. Borgani, the WFXT team   +10 more
core  

Metasurfaces in Adaptive Optics: A New Opportunity in Optical Wavefront Sensing

Laser &Photonics Reviews, EarlyView.
Wavefront sensing constitutes a critical component of adaptive optics systems, aimed at quantitatively measuring distorted wavefronts and enabling closed‐loop correction in optical setups. Metasurfaces, as planar optical elements composed of nanoscale structures, provide exceptional freedom in modulating multiple dimensions of the light field.
Rundong Fan, Zichao Wang, Pei Li, Lei Huang   +3 more
wiley   +1 more source

The Telescope Calibration of the Imaging X-Ray Polarimetry Explorer

The Astronomical Journal
Fifty years after the very first sounding rocket measurement of cosmic X-ray polarization, the Imaging X-ray Polarimetry Explorer (IXPE) mission has effectively opened a new window into the X-ray sky.
Brian D. Ramsey, Jeffery K. Kolodziejczak, Wayne H. Baumgartner, Nicholas E. Thomas, Stephen D. Bongiorno, Philip Kaaret, Stephen L. O’Dell, Allyn Tennant, Martin C. Weisskopf, Sergio Fabiani, Fabio Muleri, Paolo Soffitta, Enrico Costa, Alessandro Di Marco, Riccardo Ferrazzoli, Fabio La Monaca, John Rankin, Ajay Ratheesh, Alessio Trois, Luca Baldini, Ronaldo Bellazzini, Alessandro Brez, Luca Latronico, Leonardo Lucchesi, Alberto Manfreda, Massimo Minuti, Leonardo Orsini, Michele Pinchera, Carmelo Sgrò, Gloria Spandre   +29 more
doaj   +1 more source

When species are lost but functions persist: a trait‐based perspective on Wadden Sea bird diversity dynamics

Oikos, EarlyView.
Biodiversity faces several global threats and communities are likely to show complex delayed responses. Accurately measuring these lags is critical to properly understand diversity dynamics. Here, we investigated these delays with minimal data availability and found critical mismatches between the temporal dynamics of taxonomic and functional diversity
Lucie Kuczynski, Ana Maria Bastidas‐Urrutia, Jan Bernhard Kalusche, Christian Hof, Gregor Scheiffarth, Alexey Ryabov, Helmut Hillebrand   +6 more
wiley   +1 more source

Study of Silicon Photomultipliers for the GRIPS Calorimeter Module

Acta Polytechnica, 2013
GRIPS is a proposed gamma-ray (200 keV to 80 MeV) astronomy mission, which incorporates a pair-creation and Compton scattering telescope, along with X-ray and infrared telescopes.
Alexei Ulyanov, Lorraine Hanlon, Sheila McBreen, Suzanne Foley   +3 more
doaj  

GRB 170519A: Thermal Radiation in an X-Ray Flare and Decaying Magnetic Fields for the Early-time Afterglow

The Astrophysical Journal
GRB 170519A was discovered by the Swift Burst Alert Telescope (BAT) and then observed by the Swift X-Ray Telescope, Swift UltraViolet and Optical Telescope, and ground-based telescopes.
Zi-Min Zhou, Liang-Jun Chen, Rui-Quan Li, Xiang-Gao Wang, Xing-Ling, Li, En-Wei Liang, WeiKang Zheng, Alexei V. Filippenko   +7 more
doaj   +1 more source

Nachtsicht ins All mit dem bloßen Auge: Sag mir, wie weit die Sterne steh'n

Physik in unserer Zeit, EarlyView.
Beim Blick in den Nachthimmel sehen wir ohne optische Hilfsmittel und abhängig von der lokalen Lichtverschmutzung viele Hundert bis maximal einige Tausend Sterne und auch einige Galaxien. Aber wie weit sind diese von uns entfernt? Und bis zu welchen maximalen Entfernungen können wir Objekte im Weltall mit dem bloßen Auge wahrnehmen?
Michael Vollmer
wiley   +1 more source

Multispectral glancing incidence X-ray telescope [PDF]

A multispectural glancing incidence X-ray telescope is illustrated capable of broadband, high-resolution imaging of solar and stellar X-ray and extreme ultraviolet radiation sources which includes a primary optical system preferably of the Wolter I type ...
Hoover, R. B.
core   +1 more source

GRB 081029: Understanding Multiple Afterglow Components

, 2011
We present an analysis of the unusual optical light curve of the gamma-ray burst GRB~081029, which occurred at a redshift of z = 3.8479$. We combine X-ray and optical observations from the Swift X-Ray Telescope and the Swift UltraViolet/Optical Telescope
Antonelli, A., Chincarini, G., Covino, S., D'Avanzo, P., D'Elia, V., De Pasquale, M., Fiore, F., Holland, S. T., Mao, J., Pandey, S. B., Sakamoto, T., Schady, P.   +11 more
core   +1 more source