Results 121 to 130 of about 253,475 (297)

Understanding the Death of Massive Stars Using an Astrophysical Transients Observatory

Frontiers in Astronomy and Space Sciences, 2018
The death of massive stars, manifested as gamma-ray bursts and core-collapse supernovae, critically influence how the universe formed and evolves. Despite their fundamental importance, our understanding of these enigmatic objects is severely limited.
Peter W. A. Roming, Eddie Baron, Amanda J. Bayless, Volker Bromm, Peter J. Brown, Michael W. Davis, Anastasia Fialkov, Brian Fleming, Kevin France, Chris L. Fryer, Thomas K. Greathouse, Jed J. Hancock, D. Andrew Howell, D. Andrew Howell, Andrew J. Levan, Abraham Loeb, Raffaella Margutti, Mark L. McConnell, Paul T. O'Brien, Julian P. Osborne, Daniel A. Perley, Eric M. Schlegel, Rhaana L. C. Starling, Nial R. Tanvir, Mark Tapley, Patrick A. Young, Bing Zhang   +26 more
doaj   +1 more source

Optimum Design of a Coded Mask X-ray Telescope for Rocket Applications [PDF]

, 1976
J. Gunson, B. Polychronopulos
openalex   +1 more source

Ergonomic Evaluation of a Walk‐Behind AI‐Based Cotton Fertilizer Applicator

Journal of Field Robotics, EarlyView.
ABSTRACT The mechanization of agricultural operations greatly influences both the efficiency of farming operations and the health and safety of farm workers. Human exposure to working environments represents a significant hazard associated with machines and the environment.
Arjun Chouriya, Peeyush Soni, Smrutilipi Hota, E. V. Thomas   +3 more
wiley   +1 more source

The Extended Range X-Ray Telescope center director's discretionary fund report [PDF]

An Extended Range X-Ray Telescope (ERXRT) of high sensitivity and spatial resolution capable of functioning over a broad region of the X-ray/XUV portion of the spectrum has been designed and analyzed.
Cumings, N. P., Hildner, E., Hoover, R. B., Moore, R. L., Tandberg-Hanssen, E. A.   +4 more
core   +1 more source

2FHL J1745.1–3035: A Newly Discovered, Powerful Pulsar Wind Nebula Candidate

The Astrophysical Journal
We present a multi-epoch, multi-observatory X-ray analysis for 2FHL J1745.1–3035, a newly discovered very high-energy Galactic source detected by the Fermi Large Area Telescope (LAT) located in close proximity to the Galactic Center ( l = 358.°5319; b = −
S. Marchesi, J. Eagle, M. Ajello, D. Castro, A. Domínguez, K. Mori, L. Tibaldo, J. Tomsick, A. Traina, C. Vignali, R. Zanin   +10 more
doaj   +1 more source

The high-redshift Universe with the International X-ray Observatory [PDF]

arXiv, 2010
We discuss some of the main open issues related to the light-up and evolution of the first accreting sources powering high redshift luminous quasars. We discuss the perspectives of future deep X-ray surveys with the International X-ray Observatory and possible synergies with the Wide Field X-ray Telescope.
arxiv  

Magnetic Continuum Robot for Intelligent Manipulation in Medical Applications

SmartBot, EarlyView.
A review of magnetic continuum robotics discusses progress, actuation principles, control strategies, manipulation tasks, and future prospects, with an emphasis on robot design and algorithms for navigation, control, and intelligent manipulation in medical applications.
Yuanbiao Ma, Xuanyu An, Qijun Yang, Mingxue Cai, Zhiqiang Tang, Jinke Chang, Veronica Iacovacci, Tiantian Xu, Li Zhang, Qianqian Wang   +9 more
wiley   +1 more source

Glancing incidence telescopes for space astronomy [PDF]

Design optimization is reported for glancing telescopes of increased collecting areas. Considered are nested geometries for X-ray and extreme ultraviolet telescopes, each of which generates only one singular principal surface.
Mangus, J. D.
core   +1 more source

The 3B/X3 solar flare of 27 February 1992 [PDF]

Geofísica Internacional, 2000
Active region NOAA 7070 was related to a 3B/X3 solar flare that occurred on February 27, 1992. The soft X-ray flare observations were obtained by the SXT (Soft X-ray Telescope) on board the Yohkoh satellite, and those in Hα from the Udaipur Observatory ...
P. Démoulin, M.G. Rovira, C.H. Mandrini, M.C. López Fuentes   +3 more
doaj  

PHOTOMETRIC STUDY OF A NEW X-RAY SOURCE -THE ECLIPSING POLAR RXJ 2107.9-0518

Odessa Astronomical Publications, 2017
The object RXJ 2107.9-0518 was discovered as a soft X-ray source at the space observatory ROSAT in 1990. Its X-ray spectrum is characteristic to the systems of the AM Her type thus the object was suspected to be a polar.
E. P. Pavlenko
doaj   +1 more source