Results 31 to 40 of about 139,917 (298)

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, Chang-Young Kim, Jingang Yi
openaire   +1 more source

Diverse origins for non-repeating fast radio bursts: Rotational radio transient sources and cosmological compact binary merger remnants

Astronomy & Astrophysics, 2023
A large number of fast radio bursts (FRBs) detected with the CHIME telescope have enabled investigations of their energy distributions in different redshift intervals, incorporating the consideration of the selection effects of CHIME. As a result, we obtained a non-evolving energy function (EF) for the high-energy FRBs (HEFRBs) of energies E ≳ 2 × 1038
Zi-Liang Zhang, Yun-Wei Yu, Xiao-Feng Cao   +2 more
openaire   +2 more sources

Variable gamma-ray emission from the Be/X-ray transient A0535+26? [PDF]

, 2001
We present a study of the unidentified gamma-ray source 3EG J0542+2610. This source is spatially superposed to the supernova remnant G180.0-1.7, but its time variability makes unlikely a physical link.
Bernado, M. M. Kaufman, Combi, Jorge A., Romero, Gustavo E., Torres, Diego F.   +3 more
core   +2 more sources

An Injection System for the CHIME/FRB Experiment

The Astronomical Journal, 2023
Dedicated surveys searching for fast radio bursts (FRBs) are subject to selection effects that bias the observed population of events. Software injection systems are one method of correcting for these biases by injecting a mock population of synthetic ...
Marcus Merryfield, Shriharsh P. Tendulkar, Kaitlyn Shin, Bridget Andersen, Alexander Josephy, Deborah Good, Fengqiu Adam Dong, Kiyoshi W. Masui, Dustin Lang, Moritz Münchmeyer, Charanjot Brar, Tomas Cassanelli, Matt Dobbs, Emmanuel Fonseca, Victoria M. Kaspi, Juan Mena-Parra, Ziggy Pleunis, Masoud Rafiei-Ravandi, Ketan R. Sand, Paul Scholz, Kendrick Smith, Ingrid H. Stairs   +21 more
doaj   +1 more source

The radio luminosity of persistent X-ray binaries [PDF]

, 2000
We summarise all the reported detections of, and upper limits to, the radio emission from persistent (i.e. non-transient) X-ray binaries. A striking result is a common mean observed radio luminosity from the black hole candidates (BHCs) in the Low/Hard X-
Anantharamaiah, Berendsen, Bildsten, Bradshaw, Bradshaw, Brocksopp, Callanan, Chakrabarty, Christian, Cooke, Corbel, Cowley, Crampton, Falcke, Fender, Fender, Fender, Fender, Fender, Fender, Fender, Fender, Gaensler, Gies, Grindlay, Han, Hannikainen, Hasinger, Hjellming, Hjellming, Hjellming, Homan, Ilovaisky, Kaper, Livio, M. A. Hendry, Martí, Martí, Martí, McKie, Mendez, Mirabel, Mirabel, Mirabel, Mirabel, Negueruela, Nelson, Penninx, Penninx, Penninx, Penninx, Pooley, R. P. Fender, Reynolds, Smale, Sood, Spencer, Stirling, Svensson, Tananbaum, van der Klis, van der Klis, van Paradijs, van Paradijs, White, Wijnands, Zhang, Zwarthoed   +67 more
core   +3 more sources

Inferring the Energy and Distance Distributions of Fast Radio Bursts Using the First CHIME/FRB Catalog

The Astrophysical Journal, 2023
Fast radio bursts (FRBs) are brief, energetic, typically extragalactic flashes of radio emission whose progenitors are largely unknown. Although studying the FRB population is essential for understanding how these astrophysical phenomena occur, such ...
Kaitlyn Shin, Kiyoshi W. Masui, Mohit Bhardwaj, Tomas Cassanelli, Pragya Chawla, Matt Dobbs, Fengqiu Adam Dong, Emmanuel Fonseca, B. M. Gaensler, Antonio Herrera-Martín, Jane Kaczmarek, Victoria Kaspi, Calvin Leung, Marcus Merryfield, Daniele Michilli, Moritz Münchmeyer, Aaron B. Pearlman, Masoud Rafiei-Ravandi, Kendrick Smith, Ingrid Stairs, Shriharsh P. Tendulkar   +20 more
doaj   +1 more source

Temporal and Spectral Properties of the Persistent Radio Source Associated with FRB 20190520B with the VLA

The Astrophysical Journal, 2023
Among more than 800 known fast radio bursts (FRBs), only two, namely FRB 20121102A and FRB 20190520B, are confirmed to be associated with persistent radio sources (PRSs).
Xian Zhang, Wenfei Yu, Casey Law, Di Li, Shami Chatterjee, Paul Demorest, Zhen Yan, Chenhui Niu, Kshitij Aggarwal, Reshma Anna-Thomas, Sarah Burke-Spolaor, Liam Connor, Chao-Wei Tsai, Weiwei Zhu, Gan Luo   +14 more
doaj   +1 more source

A mechanism for fast radio bursts [PDF]

, 2015
Fast radio bursts are mysterious transient sources likely located at cosmological distances. The derived brightness temperatures exceed by many orders of magnitude the self-absorption limit of incoherent synchrotron radiation, implying the operation of a
del Valle, Maria Victoria, Romero, Gustavo E., Vieyro, Florencia L.   +2 more
core   +3 more sources

Search and identification of transient and variable radio sources using MeerKAT observations: a case study on the MAXI J1820+070 field

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 Meijn, J Bright, A J van der Horst, S Chastain, S Fijma, R Fender, I Heywood, R A M J Wijers, P A Woudt, A Andersson, G R Sivakoff, E Tremou, L N Driessen   +13 more
openaire   +4 more sources

A Dictionary Approach to Identifying Transient RFI

, 2017
As radio telescopes become more sensitive, the damaging effects of radio frequency interference (RFI) become more apparent. Near radio telescope arrays, RFI sources are often easily removed or replaced; the challenge lies in identifying them.
Czech, Daniel, Inggs, Michael, Mishra, Amit   +2 more
core   +1 more source