Results 1 to 10 of about 58,726 (292)

First Results of a Study of TeV Emission from GRBs in Milagrito [PDF]

, 1999
Milagrito, a detector sensitive to gamma-rays at TeV energies, monitored the northern sky during the period February 1997 through May 1998. With a large field of view and high duty cycle, this instrument was used to perform a search for TeV counterparts ...
Atkins, R., Benbow, W., Berley, D., Chen, M. L., Coyne, D. G., Dingus, B. L., Dorfan, D. E., Ellsworth, R. W., Evans, D., Falcone, A., Fleysher, L., Fleysher, R., Gisler, G., Goodman, J. A., Haines, T. J., Hoffman, C. M., Hugenberger, S., Kelley, L. A., Leonor, I., McConnell, M., McCullough, J. F., McEnery, J. E., Miller, R. S., Mincer, A. I., Morales, M. F., Nemethy, P., Ryan, J. M., Shen, B., Shoup, A., Sinnis, C., Smith, A. J., Sullivan, G. W., Tumer, T., Wang, K., Wascko, M. O., Westerhoff, S., Williams, D. A., Yang, T., Yodh, G. B.   +38 more
core   +4 more sources

The Peak Flux of Long Gamma-Ray Bursts in the Ep,i–Liso Diagram and in the Classification

The Astrophysical Journal
The E _p,i – L _iso correlation of long gamma-ray bursts (LGRBs) is regarded as a fundamental correlation for standardizing LGRBs to probe cosmology and constrain LGRB physics.
Guangxuan Lan, Jean-Luc Atteia
doaj   +1 more source

Multiwavelength Analysis of the Supernova-associated Low-luminosity GRB 171205A

The Astrophysical Journal
Multiwavelength properties of the nearby supernova (SN)-associated low-luminosity GRB 171205A are investigated in depth to constrain its physical origin synthetically. The pulse width is found to be correlated with energy with a power-law index of −0.24 ±
Xiu-Juan Li, Zhi-Bin Zhang, Yong-Feng Huang, Fan Xu   +3 more
doaj   +1 more source

Comprehensive Statistical Analysis of Initial Lorentz Factor and Jet Opening Angle of Gamma-Ray Bursts

The Astrophysical Journal
The initial Lorentz factor (Γ _0 ) and jet half-opening angle ( θ _jet ) of gamma-ray bursts (GRBs) are critical physical parameters for understanding the dynamical evolution of relativistic jets and the true energy release of GRBs.
Jian Zhang, Bao-Cheng Qin, Lu-Lu Zhang, Fu-Wen Zhang   +3 more
doaj   +1 more source

Simultaneous X-ray, gamma-ray, and Radio Observations of the repeating Fast Radio Burst FRB 121102

, 2017
We undertook coordinated campaigns with the Green Bank, Effelsberg, and Arecibo radio telescopes during Chandra X-ray Observatory and XMM-Newton observations of the repeating fast radio burst FRB 121102 to search for simultaneous radio and X-ray bursts ...
Bassa, C. G., Bogdanov, S., Bower, G. C., Burke-Spolaor, S., Butler, B. J., Chatterjee, S., Cordes, J. M., Gourdji, K., Hessels, J. W. T., Kaspi, V. M., Law, C. J., Lynch, R. S., Marcote, B., McLaughlin, M. A., Michilli, D., Paragi, Z., Ransom, S. M., Scholz, P., Seymour, A., Spitler, L. G., Tendulkar, S. P., Wharton, R. S.   +21 more
core   +2 more sources

RapidGBM: An Efficient Tool for Fermi-GBM Visibility Checking and Data Analysis with a Case Study of EP240617a

The Astrophysical Journal
We have developed a lightweight tool, RapidGBM , featuring a web-based interface and capabilities of rapid calculation of Fermi Gamma-ray Burst Monitor (GBM) visibilities and performance of basic data analysis.
Yun Wang, Jia Ren, Lu-Yao Jiang, Hao Zhou, Yi-Han Iris Yin, Yi-Fang Liang, Zhi-Ping Jin, Yi-Zhong Fan, Da-Ming Wei, Wei Chen, Hui Sun, Jing-Wei Hu, Dong-Yue Li, Jun Yang, Wen-Da Zhang, Yuan Liu, Wei-Min Yuan, Xue-Feng Wu   +17 more
doaj   +1 more source

A Gravitational Millilensing Candidate in GRB 111012A with a Possible Compact Merger Origin

The Astrophysical Journal
We identify GRB 111012A in the Fermi Gamma-ray Burst Monitor archive as a candidate case of gravitational millilensing. The burst shows two pulses separated by ∼3.1 s, reminiscent of previously reported lensed events such as GRB 950830 and GRB 200716C ...
Shuo Xiao, Yang Lai, Tong-Lei Liao, Zheng-Huo Jiang, Shao-Wei Xiong, Yan-Qiu Zhang, Wei Xie, Jian-Chao Sun   +7 more
doaj   +1 more source

Candidate Spectral Lines at 6 and 15 MeV from GRB 200829A and GRB 160905A

The Astrophysical Journal Letters
The discoveries of the evolving spectral line in gamma-ray burst (GRB) 221009A provide valuable information for understanding its extreme physical environment and emission mechanisms. In this work, we perform a comprehensive search for 3941 GRBs recorded
Tong-Lei Liao, Shuo Xiao, Shao-Lin Xiong, Yan-Qiu Zhang, Wang-Chen Xue, Jiao-Jiao Yang, Zheng-Huo Jiang, Shu-Xu Yi, Zhen Zhang, Shuang-Nan Zhang   +9 more
doaj   +1 more source

Significant Cocoon Emission and Photosphere Duration Stretching in GRB 211211A: A Burst from a Neutron Star−Black Hole Merger

The Astrophysical Journal
The radiation mechanism (thermal photosphere or magnetic synchrotron) and the progenitor of gamma-ray bursts (GRBs) are under hot debate. Recently discovered, the prompt long-duration (∼10 s, normally from the collapse of massive stars) property of GRB ...
Yan-Zhi Meng, Xiangyu Ivy Wang, Zi-Ke Liu   +2 more
doaj   +1 more source

Spectral and Jet Properties of the Quasi-thermal-dominated GRB 210121A, GRB 210610B, and GRB 221022B

The Astrophysical Journal
Some quasi-thermal (QT)-dominated gamma-ray bursts (GRBs) could be well described by a multicolor blackbody (mBB) function or a combined model of a BB plus a nonthermal (NT) component.
Xin-Ying Song, Ling-Jun Wang, Shu Zhang
doaj   +1 more source