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LOFAR MSSS: Detection of a low-frequency radio transient in 400 hrs of monitoring of the North Celestial Pole | | A. J. Stewart
; R. P. Fender
; J. W. Broderick
; T. E. Hassall
; T. Muñoz-Darias
; A. Rowlinson
; J. D. Swinbank
; T. D. Staley
; G. J. Molenaar
; B. Scheers
; T. L. Grobler
; M. Pietka
; G. Heald
; J. P. McKean
; M. E. Bell
; A. Bonafede
; R. P. Breton
; D. Carbone
; Y. Cendes
; A. O. Clarke
; S. Corbel
; F. de Gasperin
; J. Eislöffel
; H. Falcke
; C. Ferrari
; J.-M. Grießmeier
; M. J. Hardcastle
; V. Heesen
; J. W. T. Hessels
; A. Horneffer
; M. Iacobelli
; P. Jonker
; A. Karastergiou
; G. Kokotanekov
; V. I. Kondratiev
; M. Kuniyoshi
; C. J. Law
; J. van Leeuwen
; S. Markoff
; J. C. A. Miller-Jones
; D. Mulcahy
; E. Orru
; M. Pandey-Pommier
; L. Pratley
; E. Rol
; H. J. A. Röttgering
; A. M. M. Scaife
; A. Shulevski
; C. A. Sobey
; B. W. Stappers
; C. Tasse
; A. J. van der Horst
; S. van Velzen
; R. J. van Weeren
; R. A. M. J. Wijers
; R. Wijnands
; M. Wise
; P. Zarka
; A. Alexov
; J. Anderson
; A. Asgekar
; I. M. Avruch
; M. J. Bentum
; G. Bernardi
; P. Best
; F. Breitling
; M. Brüggen
; H. R. Butcher
; B. Ciardi
; J. E. Conway
; A. Corstanje
; E. de Geus
; A. Deller
; S. Duscha
; W. Frieswijk
; M. A. Garrett
; A. W. Gunst
; M. P. van Haarlem
; M. Hoeft
; J. Hörandel
; E. Juette
; G. Kuper
; M. Loose
; P. Maat
; R. McFadden
; D. McKay-Bukowski
; J. Moldon
; H. Munk
; M. J. Norden
; H. Paas
; A. G. Polatidis
; D. Schwarz
; J. Sluman
; O. Smirnov
; M. Steinmetz
; S. Thoudam
; M. C. Toribio
; R. Vermeulen
; C. Vocks
; S. J. Wijnholds
; O. Wucknitz
; S. Yatawatta
; | | Date: |
30 Nov 2015 | | Abstract: | We present the results of a four-month campaign searching for low-frequency
radio transients near the North Celestial Pole with the Low-Frequency Array
(LOFAR), as part of the Multifrequency Snapshot Sky Survey (MSSS). The data
were recorded between 2011 December and 2012 April and comprised 2149 11-minute
snapshots, each covering 175 deg^2. We have found one convincing candidate
astrophysical transient, with a duration of a few minutes and a flux density at
60 MHz of 15-25 Jy. The transient does not repeat and has no obvious optical or
high-energy counterpart, as a result of which its nature is unclear. The
detection of this event implies a transient rate at 60 MHz of 3.9 (+14.7, -3.7)
x 10^-4 day^-1 deg^-2, and a transient surface density of 1.5 x 10^-5 deg^-2,
at a 7.9-Jy limiting flux density and ~10-minute time-scale. The campaign data
were also searched for transients at a range of other time-scales, from 0.5 to
297 min, which allowed us to place a range of limits on transient rates at 60
MHz as a function of observation duration. | | Source: | arXiv, 1512.0014 | | Services: | Forum | Review | PDF | Favorites | |
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