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High Energy Astrophysical Techniques [PDF]

Proceedings of Multifrequency Behaviour of High Energy Cosmic Sources - XIII — PoS(MULTIF2019), 2017
This textbook presents ultraviolet and X-ray astronomy, gamma-ray astronomy, cosmic ray astronomy, neutrino astronomy, and gravitational wave astronomy as distinct research areas, focusing on the astrophysics targets and the requirements with respect to instrumentation and observation methods.
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Quantum regression theorem in the Unruh–DeWitt battery

European Physical Journal C: Particles and Fields
In this paper, we employ the quantum regression theorem, a powerful tool in the study of open quantum systems, to analytically study the correlation functions of an Unruh–DeWitt detector, which is an uniformly accelerated two-level quantum system ...
Manjari Dutta, Arnab Mukherjee, Sunandan Gangopadhyay   +2 more
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New Timing Results of MSPs from NICER Observations

Universe
Millisecond pulsars (MSPs) are known for their long-term stability. Using six years of observations from the Neutron Star Interior Composition Explorer (NICER), we have conducted an in-depth analysis of the X-ray timing results for six MSPs: PSRs B1937 ...
Shijie Zheng, Dawei Han, Heng Xu, Kejia Lee, Jianping Yuan, Haoxi Wang, Mingyu Ge, Liang Zhang, Yongye Li, Yitao Yin, Xiang Ma, Yong Chen, Shuangnan Zhang   +12 more
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Astrophysical high-energy neutrinos [PDF]

Physics Today, 2018
News from multiple messengers—neutrinos, cosmic rays, and photons—provides clues to the cosmic sources that create some of the most energetic particles observed on Earth.
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Black hole as coherent signal amplifier

European Physical Journal C: Particles and Fields
In a recent analysis (Misra et al. in npj Quantum Inf 10:34, 2024. 10.1038/s41534-024-00817-w), it has been shown that Hawking radiation is the main source of energy to empower a coherent signal pulse. In this work, we have explored the same effect for a
Arpita Jana, Soham Sen, Sunandan Gangopadhyay   +2 more
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Relativistic 56Ni decay lines in GRB 221009A

Communications Physics
Long Gamma Ray Bursts are thought to originate from the core collapse of massive stars that give rise to energetic broad-lined Type Ic supernovae. The brightest burst ever recorded, GRB 221009A, has been linked to a broad-lined Type Ic supernova through ...
Rahim Moradi, Emre S. Yorgancioglu, Shao-Lin Xiong, Yan-Qiu Zhang, Shuang-Nan Zhang, Roland Diehl, Yu Wang   +6 more
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Exploring the Components of Cosmogenic UHECR, Neutrino, and Diffuse Gamma Ray from High-Energy Astrophysical Objects

Galaxies
The development of multimessenger astrophysics allows us to probe various background particles from the distant early universe. Up to now, much effort has been made researching the emission and radiation of diverse steady or transient astrophysical ...
Fangsheng Min, Hong Lu, Yiqing Guo
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Design and implementation of on-board high reliability FPGA on-orbit reconfiguration

Measurement + Control
The electronic system of the multi-chip combined control architecture satellites often requires an on-orbit reconfiguration capability for field programmable gate arrays (FPGAs). The purpose is to provide program backup and rapid on-orbit reconfiguration
Longkun Yu, Shuai Yang, Xiangyang Wen, Jiacong Liu, Jiarong Yan, Xinqiao Li, Shaolin Xiong, Zhigang Lu, Ke Gong, Yaqing Liu, Zhenghua An, Dali Zhang, Xiaojing Liu, Xiaoyun Zhao, Fan Zhang, Jinzhou Wang, Min Gao, Yanbing Xu, Xilei Sun, Hui Wang, Chao Zheng, Peiyi Feng, Chenwei Wang, Yanqiu Zhang, Peng Zhang, Zhiqiang Ding, Yongye Li, Chenxing Zhang, Jing Wang, Li Chen   +29 more
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Progress of GECAM Observation Research

Kongjian kexue xuebao
Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a constellation with four instruments (launch date): GECAM-A/B (10 December 2020), GECAM-C (27 July 2022) and GECAM-D (13 March 2024), which are dedicated to monitoring
WANG Chenwei, ZHANG Yanqiu, XIONG Shaolin, LIU Jiacong, TAN Wenjun, XIAO Shuo, XIE Shenglun, XUE Wangchen, ZHAO Haisheng, ZHAO Yi, ZHENG Chao   +10 more
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Torsional modulation of atmospheric neutrino oscillation

Journal of High Energy Physics
Fermions act as sources of spacetime torsion. However, this torsion is non-dynamical and can be eliminated using its equations of motion. The resulting theory features an effective four-fermion interaction in a torsion-free background.
Riya Barick, Amitabha Lahiri
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