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Accurate and Robust Synchronous Extraction Algorithm for Star Centroid and Nearby Celestial Body Edge
期刊论文
IEEE ACCESS, 2019, 卷号: 7, 页码: 126742-126752
作者:
Zhang, Yong
;
Jiang, Jie
;
Zhang, Guangjun
;
Lu, Yan
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浏览/下载:13/0
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提交时间:2019/12/30
Optical autonomous navigation
high robustness and accuracy
star centroid
nearby celestial body edge
1D energy deviation effect
Constant cyclotron line energy in Hercules X-1 - Joint Insight-HXMT and NuSTAR observations
期刊论文
Journal of High Energy Astrophysics, 2019, 卷号: 23, 页码: 29-32
作者:
HXMT
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浏览/下载:33/0
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提交时间:2022/02/08
Stars: neutron star
Pulsars: binary(Her X-1)
X-rays: stars
Astrophysics - High Energy Astrophysical Phenomena
Abstract: The long-term evolution of the centroid energy of the CRSF in Her X-1 is still a mystery. We report a new measurement from a campaign between Insight-HXMT and NuSTAR performed in February 2018. Generally, the two satellites show well consistent results of timing and spectral properties. The joint spectral analysis confirms that the previously observed long decay phase has ended, and that the line energy instead keeps constant around 37.5 keV after flux correction.
Timing analysis of Swift J1658.2-4242's outburst in 2018 with Insight-HXMT, NICER and AstroSat
期刊论文
Journal of High Energy Astrophysics, 2019, 卷号: 24, 页码: 30-40
作者:
HXMT
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浏览/下载:43/0
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提交时间:2022/02/08
Accretion
accretion disks
Black hole physics
X-rays: binaries:
Swift J1658.2-4242
Astrophysics - High Energy Astrophysical Phenomena
Abstract: We present the observational results from a detailed timing analysis of the black hole candidate Swift J1658.2-4242 during its 2018 outburst with the observations of Hard X-ray Modulation Telescope (Insight-HXMT), Neutron Star Interior Composition Explorer (NICER) and AstroSat in 0.1-250 keV. The evolution of intensity, hardness and integrated fractional root mean square (rms) observed by Insight-HXMT and NICER are presented in this paper. Type-C quasi-periodic oscillations (QPOs) observed by NICER (0.8-3.5 Hz) and Insight-HXMT (1-1.6 Hz) are also reported in this work. The features of the QPOs are analyzed with an energy range of 0.5-50 keV. The relations between QPO frequency and other characteristics such as intensity, hardness and QPO rms are carefully studied. The timing and spectral properties indicate that Swift J1658.2-4242 is a black hole binary system. Besides, the rms spectra of the source calculated from the simultaneous observation of Insight-HXMT, NICER and AstroSat support the Lense-Thirring origin of the QPOs. The relation between QPO phase lag and the centroid frequency of Swift J1658.2-4242 reveals a near zero constant when < 4Hz and a soft phase lag at 6.68 Hz. This independence follows the same trend as the high inclination galactic black hole binaries such as MAXI J1659-152.
Distributed Parallel Super-Block-Based Star Detection and Centroid Calculation
会议论文
IEEE SENSORS JOURNAL, 2018-10-01
作者:
Wang, Zhen
;
Jiang, Jie
;
Zhang, Guangjun
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浏览/下载:7/0
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提交时间:2019/12/30
Distributed parallel
star detection
centroid location
star tracker
distributed shared memory
image sensors application
Distributed Parallel Super-Block-Based Star Detection and Centroid Calculation
期刊论文
IEEE SENSORS JOURNAL, 2018, 卷号: 18, 页码: 8096-8107
作者:
Wang, Zhen
;
Jiang, Jie
;
Zhang, Guangjun
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浏览/下载:3/0
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提交时间:2019/12/30
Distributed parallel
star detection
centroid location
star tracker
distributed shared memory
image sensors application
Multichannel fast star centroid extraction method with low memory resource cost [低存储资源开销的多路快速星点质心提取方法]
期刊论文
Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics, 2018, 卷号: 44, 页码: 2586-2594
作者:
Yu, W.
;
Jiang, J.
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浏览/下载:9/0
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提交时间:2019/12/30
Extraction
Field programmable gate arrays (FPGA)
Information fusion
Stars
Centroid extractions
Information fusion technology
Low memory
Multichannel
Performance indices
Single channel methods
Star sensors
Utilization efficiency
Image processing
Celestial Object Imaging Model and Parameter Optimization for an Optical Navigation Sensor Based on the Well Capacity Adjusting Scheme
期刊论文
SENSORS, 2017, 卷号: 17
作者:
Wang Hao
;
Jiang Jie
;
Zhang Guangjun
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浏览/下载:4/0
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提交时间:2019/12/30
optical navigation sensor
well capacity adjusting
star centroid estimation
edge extraction
exposure parameter optimization
A novel star extraction method based on modified water flow model
会议论文
LIDAR IMAGING DETECTION AND TARGET RECOGNITION 2017, 2017-01-01
作者:
Zhang, Hao
;
Niu, Yanxiong
;
Lu, Jiazhen
;
Ouyang, Zibiao
;
Yang, Yanqiang
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浏览/下载:1/0
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提交时间:2019/12/30
Star sensor
star extraction
modified water flow model
star centroid
Fast star centroid extraction algorithm with sub-pixel accuracy based on FPGA
期刊论文
JOURNAL OF REAL-TIME IMAGE PROCESSING, 2016, 卷号: 12, 页码: 613-622
作者:
Zhou, Fuqiang
;
Zhao, Jingxin
;
Ye, Tao
;
Chen, Lipeng
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  |  
浏览/下载:2/0
  |  
提交时间:2019/12/30
Star centroid
Sub-pixel
Zero crossing
FPGA
Hardware Implementation of Fast and Robust Star Centroid Extraction With Low Resource Cost
期刊论文
IEEE SENSORS JOURNAL, 2015, 卷号: 15, 页码: 4857-4865
作者:
Wang, Xiaolin
;
Wei, Xinguo
;
Fan, Qiaoyun
;
Li, Jian
;
Wang, Gangyi
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浏览/下载:1/0
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提交时间:2020/01/06
Hardware implementation
star tracker
star image
star centroid extraction
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