2016MNRAS.456.2321S

Query : 2016MNRAS.456.2321S

2016MNRAS.456.2321S - Mon. Not. R. Astron. Soc., 456, 2321-2342 (2016/March-1)

LOFAR MSSS: detection of a low-frequency radio transient in 400 h of monitoring of the North Celestial Pole.

STEWART A.J., FENDER R.P., BRODERICK J.W., HASSALL T.E., MUNOZ-DARIAS T., ROWLINSON A., SWINBANK J.D., STALEY T.D., MOLENAAR G.J., SCHEERS B., GROBLER T.L., PIETKA M., HEALD G., McKEAN J.P., BELL M.E., BONAFEDE A., BRETON R.P., CARBONE D., CENDES Y., CLARKE A.O., CORBEL S., DE GASPERIN F., EISLOFFEL J., FALCKE H., FERRARI C., GRIESSMEIER J.-M., HARDCASTLE M.J., HEESEN V., HESSELS J.W.T., HORNEFFER A., IACOBELLI M., JONKER P., KARASTERGIOU A., KOKOTANEKOV G., KONDRATIEV V.I., KUNIYOSHI M., LAW C.J., VAN LEEUWEN J., MARKOFF S., MILLER-JONES J.C.A., MULCAHY D., ORRU E., PANDEY-POMMIER M., PRATLEY L., ROL E., ROTTGERING H.J.A., SCAIFE A.M.M., SHULEVSKI A., SOBEY C.A., STAPPERS B.W., TASSE C., VAN DER HORST A.J., VAN VELZEN S., VAN WEEREN R.J., WIJERS R.A.M.J., WIJNANDS R., WISE M., ZARKA P., ALEXOV A., ANDERSON J., ASGEKAR A., AVRUCH I.M., BENTUM M.J., BERNARDI G., BEST P., BREITLING F., BRUGGEN M., BUTCHER H.R., CIARDI B., CONWAY J.E., CORSTANJE A., DE GEUS E., DELLER A., DUSCHA S., FRIESWIJK W., GARRETT M.A., GUNST A.W., VAN HAARLEM M.P., HOEFT M., HORANDEL J., JUETTE E., KUPER G., LOOSE M., MAAT P., McFADDEN R., McKAY-BUKOWSKI D., MOLDON J., MUNK H., NORDEN M.J., PAAS H., POLATIDIS A.G., SCHWARZ D., SLUMAN J., SMIRNOV O., STEINMETZ M., THOUDAM S., TORIBIO M.C., VERMEULEN R., VOCKS C., WIJNHOLDS S.J., WUCKNITZ O. and YATAWATTA S.

Abstract (from CDS):

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-min snapshots, each covering 175 deg2. 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_-3.7×10^-4/d/deg2, and a transient surface density of 1.5x10-5/deg2, at a 7.9-Jy limiting flux density and ∼ 10-min 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.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): instrumentation: interferometers - techniques: image processing - radio continuum: general

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME NCP reg 00 00 00 +90 00.0           ~ 216 0
2 NVSS J011045+873822 Rad 01 10 44.95 +87 38 22.5           ~ 6 1
3 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
4 3C 61.1 Sy2 02 23 13.4857575951 +86 19 13.422392083     19.0     ~ 210 1
5 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
6 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1573 1
7 3C 196 Sy1 08 13 36.0561170112 +48 13 02.644966020   18.36 17.79     ~ 578 2
8 V* AD Leo PM* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1469 1
9 3C 295 Sy1 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 1021 4
10 SWIFT J164449.3+573451 G 16 44 47.81184000 +57 35 00.7113480           ~ 533 0
11 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
12 MCG+07-41-003 Bla 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2537 2
13 FRB 110626 rB 21 03 43.0 -44 44 19           ~ 49 1
14 3C 435.1 rG 21 30 06.87 +83 57 31.0   21.0       ~ 27 1
15 FRB 110220 rB 22 34 38.0 -12 33 44           ~ 82 0
16 V* EV Lac PM* 22 46 49.7312610268 +44 20 02.374381562   11.85 10.26 9.89   M4.0Ve 993 2
17 NAME ILT J225347+862146 ev 22 53 47.10 +86 21 46.4           ~ 5 0
18 FRB 120127 rB 23 15 06.0 -18 25 37           ~ 51 0
19 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1
20 FRB 110703 rB 23 30 51.0 -02 52 24           ~ 54 0

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