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浏览/检索结果: 共56条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择作者升序作者降序发表日期升序发表日期降序题名升序题名降序提交时间升序提交时间降序 Optical System of Jiao Tong University Spectroscopic Telescope(JUST) 会议论文  OAI收割 Yokohama, Japan, 2024 作者:  Liu TT(刘婷婷);  Bai H(白华);  Yuan XY(袁祥岩);  Cong JN(丛迦南)   |  收藏  |  浏览/下载：1/0  |  提交时间：2025/12/29 Astronomical instrumentation  Optical telescopes  Optical design   Imaging quality evaluation method for large field-of-view telescope optical systems 期刊论文  OAI收割 Journal of Astronomical Telescopes, Instruments, and Systems, 2024, 卷号: 10, 期号: 2, 页码: 025003-1-17 作者:  Chen C(陈超);  Li ZY(李正阳);  Wu ZX(吴之旭);  Zhang YM(张一鸣);  Yuan XY(袁祥岩)   |  收藏  |  浏览/下载：1/0  |  提交时间：2025/12/29 optical telescopes  imaging shape  large FoV  evaluation method   Optical design for SiTian project 会议论文  OAI收割 Online Only, 2022-12-20 作者:     |  收藏  |  浏览/下载：56/0  |  提交时间：2023/03/22 Wide FOV optical design  Optical telescopes  Time-domain Astronomy   International Asteroid Warning Network Timing Campaign: 2019 XS 期刊论文  OAI收割 The Planetary Science Journal, 2022, 卷号: 3, 页码: 156 作者:  Farnocchia, Davide;  REF!Lane, David   |  收藏  |  浏览/下载：33/0  |  提交时间：2023/06/19 Asteroids  Near-Earth objects  Optical telescopes  Astrometry  72  1092  1174  80   Wideband Vibrations Rejection of Tip-Tilt Mirror Using Error-Based Disturbance Observer 期刊论文  OAI收割 IEEE Access, 2020, 卷号: 8, 页码: 5131-5138 作者:  Niu, Shuaixu;  Yang, Tao;  Tang, Tao;  Xu, Tianrong;  Ruan, Yong   |  收藏  |  浏览/下载：75/0  |  提交时间：2021/05/11 Error-based disturbance observer  wideband vibration rejection  optical telescopes  Youla parameterization  tip-tilt mirror   Optical Variability of the TeV Blazar 1ES 0806+524 on Diverse Timescales 期刊论文  OAI收割 The Astrophysical Journal, 2020, 卷号: 890, 期号: 1 作者:  Pandey,Ashwani;  Gupta,Alok C.;  Kurtanidze,Sofia O.;  Wiita,Paul J.;  Damljanovic,G.   |  收藏  |  浏览/下载：70/0  |  提交时间：2021/09/26 Active galactic nuclei  Blazars  Observational astronomy  CCD photometry  Radio loud quasars  Active galaxies  Optical observation  Relativistic jets  Optical telescopes  BL Lacertae objects   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：43/0  |  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).   Imaging quality evaluation of soft X-ray grazing incidence telescope 期刊论文  OAI收割 Guangxue Jingmi Gongcheng/Optics and Precision Engineering, 2019, 卷号: 27, 期号: 10, 页码: 2136-2143 作者:  P.Liu;  B.Chen;  Y.-C.Zhang;  L.-P.He;  X.-D.Wang   |  收藏  |  浏览/下载：57/0  |  提交时间：2020/08/24 Image quality,Errors,MATLAB,Optical systems,Plasma interactions,Quality control,Surface scattering,Telescopes,X ray optics,X ray scattering,X rays   Research on positioning mechanism of optical device based on on-orbit replacement 期刊论文  OAI收割 Guangxue Jingmi Gongcheng/Optics and Precision Engineering, 2019, 卷号: 27, 期号: 10, 页码: 2233-2240 作者:  Q.-Y.Li;  W.-G.Zhao;  Z.Shi;  Y.Wang;  L.Z.-Y   |  收藏  |  浏览/下载：48/0  |  提交时间：2020/08/24 Optical devices,Orbits,Space telescopes,Unloading   Vehicular Daytime High-resolution Imaging System Based on Phase-diversity Technology 期刊论文  OAI收割 Guangzi Xuebao/Acta Photonica Sinica, 2019, 卷号: 48, 期号: 3 作者:  M.Ming;  T.Chen;  T.-S.Xu   |  收藏  |  浏览/下载：45/0  |  提交时间：2020/08/24 Image resolution,Diffraction,Imaging systems,Infrared devices,Infrared radiation,Object detection,Optical design,Optical telescopes,Phase measurement,Space telescopes,Wavefronts