Results 91 to 100 of about 77,058 (202)

Solar Flares as Electron Accelerators: Toward a Resolution of the Acceleration Efficiency Issue

The Astrophysical Journal
A major open issue concerning the active Sun is the effectiveness with which magnetic reconnection accelerates electrons in flares. A paper published by Nature in 2022 used microwave observations to conclude that the Sun is an almost ideal accelerator ...
Anna Volpara, Paolo Massa, Michele Piana, Anna Maria Massone, A. Gordon Emslie   +4 more
doaj   +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  

Concept of a Double Tilted Rowland Spectrograph for X-Rays

The Astrophysical Journal
High-resolution spectroscopy in soft X-rays (
Hans Moritz Günther, Casey T. DeRoo, Ralf K. Heilmann, Edward Hertz   +3 more
doaj   +1 more source

Insights into the Properties of Type Ibn/Icn Supernovae and Their Progenitor Channels through X-Ray Emission

The Astrophysical Journal
Type Ibn/Icn supernovae (SNe Ibn/Icn), which are characterized by narrow helium or carbon lines that originated in hydrogen-poor dense circumstellar medium (CSM), provide new insights into the final evolution of massive stars.
Yusuke Inoue, Keiichi Maeda
doaj   +1 more source

Unraveling the Hybrid Origins of the X-Ray Nonthermal Emission from IGR J17091–3624

The Astrophysical Journal
We present a comprehensive study based on multiwavelength observations from the NuSTAR, NICER, Swift, Fermi, NEOWISE, and ATCA telescopes during the 2022 outburst of the black-hole X-ray binary IGR J17091–3624.
Zikun Lin, Yanan Wang, Santiago del Palacio, Mariano Méndez, Shuang-Nan Zhang, Thomas D. Russell, Long Ji, Jin Zhang, Liang Zhang, Diego Altamirano, Jifeng Liu   +10 more
doaj   +1 more source

Insight-HXMT Observations of the Extremely Bright GRB 221009A

The Astrophysical Journal
The Insight Hard X-ray Modulation Telescope (Insight-HXMT) detected GRB 221009A, the brightest gamma-ray burst (GRB) observed to date, with all its three telescopes, i.e., the High Energy (HE) telescope (20–250 keV), Medium Energy (ME) telescope (5–30 ...
Wen-Long Zhang, Wang-Chen Xue, Cheng-Kui Li, Shao-Lin Xiong, Gang Li, Yong Chen, Wei-Wei Cui, Xiao-Bo Li, Cong-Zhan Liu, Ming-Yu Ge, Wen-Jun Tan, Jia-Cong Liu, Chen-Wei Wang, Chao Zheng, Yan-Qiu Zhang, Yue Wang, Zhen Zhang, Shu-Xu Yi, Shuo Xiao, Ce Cai, Shuang-Xi Yi, Li-Ming Song, Lian Tao, Shu Zhang, Shuang-Nan Zhang   +24 more
doaj   +1 more source

Test method for telescopes using a point source at a finite distance [PDF]

A test method for telescopes that makes use of a focused ring formed by an annular aperture when using a point source at a finite distance is evaluated theoretically and experimentally.
Griner, D. B., Korsch, D., Zissa, D. E.
core   +1 more source

Broadband X-Ray Observations of the Periodic Optical Source ZTF J185139.81+171430.3 and Its Identification as a Massive Intermediate Polar

The Astrophysical Journal
We present X-ray observations of the periodic optical source ZTF J185139.81+171430.3 (hereafter ZTF J1851) by the XMM-Newton, NICER, and NuSTAR telescopes.
Ren Deng, Kaya Mori, Eric Miao, Gabriel Bridges, Charles J. Hailey, David A. H. Buckley, Gavin Ramsay, Dan Jarvis   +7 more
doaj   +1 more source

Development of high throughput X-ray telescopes for X-ray imaging and dispersive spectrometers [PDF]

During the past year the technical approach to the realization of a high throughput Kirkpatrick-Baez X-ray mirror became better defined in terms of construction methodology and factors which affect maximum size. More progress was made than anticipated in
Gorenstein, P.
core   +1 more source

Telescopes team up to probe distant worlds. [PDF]

Proc Natl Acad Sci U S A
Mann A.
europepmc   +1 more source