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浏览/检索结果: 共17条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Resolving the inner jet of PKS 1749+096 with super-resolution VLBA images at 7 mm 期刊论文  OAI收割 Research in Astronomy and Astrophysics, 2021, 卷号: 21, 期号: 4, 页码: 91 作者:  Cui, Lang;  Lu, Ru-Sen;  Yu, Wei;  Liu, Jun;  Patino-Alvarez, Victor M.   |  收藏  |  浏览/下载：26/0  |  提交时间：2022/06/30 galaxies  quasars  individual  PKS 1749+096  galaxies  jets  radio  continuum  galaxies  gamma-ray emission  parsec-scale jet  lac objects  resolution  m87  base  agn  Astronomy & Astrophysics   Two components model for TeV gamma-ray emission from extreme high-energy BL Lac objects 期刊论文  OAI收割 ASTROPHYSICS AND SPACE SCIENCE, 2021, 卷号: 366, 期号: 4, 页码: 11 作者:  Dong, Q.;  Zheng, Y. G.;  Yang CY(杨初源)   |  收藏  |  浏览/下载：35/0  |  提交时间：2021/05/17 gamma-ray emission  high-energy radiation mechanisms  non-thermal  BL Lacertae objects   Quasi-periodic Pulsations of Gamma-Ray Emissions from a Solar Flare on 2017 September 6 期刊论文  OAI收割 The Astrophysical Journal, 2020, 卷号: 888, 期号: 2 作者:  Li,D.;  Kolotkov,D. Y.;  Nakariakov,V. M.;  Lu,L.;  Ning,Z. J.   |  收藏  |  浏览/下载：43/0  |  提交时间：2020/03/19 Solar X-ray emission  Solar gamma-ray emission  Solar oscillations  Solar flares  Solar radio emission   Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文  OAI收割 The Astrophysical Journal, 2020, 卷号: 901, 页码: L7 作者:  HXMT   |  收藏  |  浏览/下载：22/0  |  提交时间：2022/02/08 Radio transient sources  Magnetars  Soft gamma-ray repeaters  2008  992  1471  Astrophysics - High Energy Astrophysical Phenomena  Astrophysics - Instrumentation and Methods for Astrophysics  Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of AJ = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 1014 Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to RNIR ? 0.025 (fluence index ?0.35).   MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY 期刊论文  OAI收割 Astrophysical Journal, 2016, 卷号: 816, 期号: 2, 页码: 76 作者:  Lu, J. G.;  Du, Y. J.;  Hao, L. F.;  Yan, Z.;  Liu, Z. Y.   |  收藏  |  浏览/下载：22/0  |  提交时间：2019/12/09 acceleration of particles  pulsars: general  pulsars: individual (PSR  B1133+16)  radiation mechanisms: non-thermal  INVERSE COMPTON-SCATTERING  GAMMA-RAY EMISSION  PULSAR EMISSION  FREQUENCY-DEPENDENCE  ANNULAR GAP  EMPIRICAL-THEORY  CRAB PULSAR  ICS  MODEL  BEAMS  CORE  Astronomy & Astrophysics   Performance Evaluation and Initial Clinical Test of the Positron Emission Mammography System (PEMi) 期刊论文  OAI收割 IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2015, 卷号: 62, 期号: 5, 页码: 2048-2056 作者:  Li L(李琳);  Gu XY(顾笑悦);  Li DW(李道武);  Huang XC(黄先超);  Chai P(柴培) 收藏  |  浏览/下载：28/0  |  提交时间：2016/04/18 Biomedical imaging  breast cancer  gamma-ray detectors  positron emission mammography (PEM)  positron emission tomography (PET)   Highlights of the ARGO-YBJ Experiment at 4,300 m a.s.l. 期刊论文  OAI收割 BRAZILIAN JOURNAL OF PHYSICS, 2014, 卷号: 44, 期号: 5, 页码: 494-503 作者:  ARGO-YBJ Collaboration 收藏  |  浏览/下载：18/0  |  提交时间：2015/12/02 GAMMA-RAY OBSERVATION  COSMIC-RAYS  GALACTIC PLANE  CRAB-NEBULA  ENERGY-SPECTRUM  TEV  EMISSION  ANISOTROPY  MILAGRO  PULSAR   Some recent progress in study of gravity and cosmology 期刊论文  OAI收割 CHINESE SCIENCE BULLETIN, 2012, 卷号: 57, 期号: 36, 页码: 4668-4671 作者:  Li, M 收藏  |  浏览/下载：26/0  |  提交时间：2014/04/24 GAMMA-RAY BURSTS  HOLOGRAPHIC DARK ENERGY  ENTROPY CORRECTION  BLACK-HOLE  WMAP DATA  AFTERGLOW  MODEL  PRINCIPLE  EMISSION  PROFILE   Some recent progress in study of gravity and cosmology 期刊论文  OAI收割 CHINESE SCIENCE BULLETIN, 2012, 卷号: 57, 期号: 36, 页码: 4668 Li, M 收藏  |  浏览/下载：23/0  |  提交时间：2013/09/24 GAMMA-RAY BURSTS  HOLOGRAPHIC DARK ENERGY  ENTROPY CORRECTION  BLACK-HOLE  WMAP DATA  AFTERGLOW  MODEL  PRINCIPLE  EMISSION  PROFILE   MODELING THE MULTI-WAVELENGTH EMISSION OF THE SHELL-TYPE SUPERNOVA REMNANT RX J1713.7−3946 期刊论文  OAI收割 The Astrophysical Journal, 2011, 卷号: 735, 期号: 2, 页码: 120(9) Yuan Qiang; Liu Siming; Fan Zhonghui 收藏  |  浏览/下载：19/0  |  提交时间：2012/08/07 COSMIC-RAY ACCELERATION  STOCHASTIC ELECTRON ACCELERATION  INTERSTELLAR RADIATION-FIELD  SHOCK ACCELERATION  PARTICLE-ACCELERATION  NONTHERMAL EMISSION  SN 1006  GAMMA  TEV  RX-J1713.7-3946