Results 251 to 260 of about 140,620 (283)
Radio variable and transient sources on minute time-scales in the ASKAP pilot surveys
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT We present results from a radio survey for variable and transient sources on 15-min time-scales, using the Australian SKA Pathfinder (ASKAP) pilot surveys. The pilot surveys consist of 505 h of observations conducted at around 1 GHz observing frequency, with a total sky coverage of 1476 deg2.
Yuanming Wang, Tara Murphy, E Lenc
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Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT Many transient and variable sources detected at multiple wavelengths are also observed to vary at radio frequencies. However, these samples are typically biased towards sources that are initially detected in wide-field optical, X-ray, or gamma-ray surveys.
A Rowlinson, J S Bright, S Fijma
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Identifying transient and variable sources in radio images [PDF]
Astronomy and Computing, 2019 With the arrival of a number of wide-field snapshot image-plane radio transient surveys, there will be a huge influx of images in the coming years making it impossible to manually analyse the datasets. Automated pipelines to process the information stored in the images are being developed, such as the LOFAR Transients Pipeline, outputting light curves ...
A Rowlinson +2 more
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Simultaneous Localization of Multiple Unknown and Transient Radio Sources Using a Mobile Robot [PDF]
IEEE Transactions on Robotics, 2012 We report system and algorithm developments that utilize a single mobile robot to simultaneously localize multiple unknown transient radio sources. Because of signal source anonymity, short transmission durations, and dynamic transmission patterns, the robot cannot treat the radio sources as continuous radio beacons.
Dezhen Song +2 more
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VARIABLE AND TRANSIENT RADIO SOURCES IN THE FIRST SURVEY [PDF]
Astrophysical Journal, 2011 A comprehensive search for variable and transient radio sources has been conducted using ~55,000 snapshot images of the FIRST survey. We present an analysis leading to the discovery of 1,627 variable and transient objects down to mJy levels over a wide range of timescales (few minutes to years).
Thyagarajan, Nithyanandan +3 more
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Cooperative Search of Multiple Unknown Transient Radio Sources Using Multiple Paired Mobile Robots [PDF]
IEEE Transactions on Robotics, 2014 We develop a localization method to enable a team of mobile robots to search for multiple unknown transient radio sources. Because of signal source anonymity, short transmission durations, and dynamic transmission patterns, robots cannot treat the radio sources as continuous radio beacons.
Chang-Young Kim +2 more
exaly +3 more sources
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Decentralized searching of multiple unknown and transient radio sources
2013 IEEE International Conference on Robotics and Automation, 2013We develop a decentralized algorithm to coordinate a group of mobile robots to search for unknown and transient radio sources. In addition to limited mobility and ranges of communication and sensing, the robot team has to deal with challenges from signal source anonymity, short transmission duration, and variable transmission power.
Chang-Young Kim +2 more
exaly +2 more sources
Decentralized Searching of Multiple Unknown and Transient Radio Sources with Paired Robots
Engineering, 2015 ABSTRACTIn this paper, we develop a decentralized algorithm to coordinate a group of mobile robots to search for unknown and transient radio sources. In addition to limited mobility and ranges of communication and sensing, the robot team has to deal with challenges from signal source anonymity, short transmission duration, and variable transmission ...
Chang-Young Kim +2 more
exaly +3 more sources