LOFAR 144-MHz follow-up observations of GW170817
Artikel i vetenskaplig tidskrift, 2020
We present low-radio-frequency follow-up observations of AT 2017gfo, the electromagnetic counterpart of GW170817, which was the first binary neutron star merger to be detected by Advanced LIGO-Virgo. These data, with a central frequency of 144 MHz, were obtained with LOFAR, the Low-Frequency Array. The maximum elevation of the target is just 13 degrees.7 when observed with LOFAR, making our observations particularly challenging to calibrate and significantly limiting the achievable sensitivity. On time-scales of 130-138 and 371-374 d after the merger event, we obtain 3s upper limits for the afterglow component of 6.6 and 19.5mJy beam(-1), respectively. Using our best upper limit and previously published, contemporaneous higher frequency radio data, we place a limit on any potential steepening of the radio spectrum between 610 and 144 MHz: the two-point spectral index alpha(610)(144) greater than or similar to -2.5. We also show that LOFAR can detect the afterglows of future binary neutron star merger events occurring at more favourable elevations.
stars: neutron
radio continuum: stars
gravitational waves
Författare
J. W. Broderick
Netherlands Institute for Radio Astronomy (ASTRON)
Curtin University
T. W. Shimwell
Netherlands Institute for Radio Astronomy (ASTRON)
Universiteit Leiden
K. Gourdji
Universiteit Van Amsterdam
A. Rowlinson
Netherlands Institute for Radio Astronomy (ASTRON)
Universiteit Van Amsterdam
S. Nissanke
Universiteit Van Amsterdam
National Institute for Subatomic Physics (NIKHEF)
K. Hotokezaka
Princeton University
University of Tokyo
P. G. Jonker
Radboud Universiteit
Netherlands Institute for Space Research (SRON)
C. Tasse
Université de recherche Paris Sciences et Lettres
Rhodes University
M. J. Hardcastle
University of Hertfordshire
J. B. R. Oonk
University of Hertfordshire
Surfsara Bv
R. P. Fender
University of Oxford
R. A. M. J. Wijers
Universiteit Van Amsterdam
A. Shulevski
Universiteit Van Amsterdam
A. J. Stewart
The University of Sydney
S. ter Veen
Netherlands Institute for Radio Astronomy (ASTRON)
V. A. Moss
Netherlands Institute for Radio Astronomy (ASTRON)
Commonwealth Scientific and Industrial Research Organisation (CSIRO)
The University of Sydney
M. H. D. van der Wiel
Netherlands Institute for Radio Astronomy (ASTRON)
D. A. Nichols
Universiteit Van Amsterdam
University of Virginia
A. Piette
University of Cambridge
M. E. Bell
University of Technology Sydney
D. Carbone
University of The Virgin Islands
S. Corbel
Université Paris Diderot
Universite d'Orleans
J. Eisloeffel
Thüringer Landessternwarte Tautenburg
J-M Griessmeier
Universite d'Orleans
E. F. Keane
Jodrell Bank Observatory
C. J. Law
California Institute of Technology (Caltech)
T. Munoz-Darias
Universidad de la Laguna
Instituto de Astrofísica de Canarias
M. Pietka
University of Oxford
M. Serylak
South African Radio Astronomy Observatory (SARAO)
University of the Western Cape
A. J. van der Horst
George Washington University
J. van Leeuwen
Universiteit Van Amsterdam
Netherlands Institute for Radio Astronomy (ASTRON)
R. Wijnands
Universiteit Van Amsterdam
P. Zarka
Observatoire de Paris
LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique
J. M. Anderson
Deutsches GeoForschungsZentrum (GFZ)
Technische Universität Berlin
M. J. Bentum
Netherlands Institute for Radio Astronomy (ASTRON)
Technische Universiteit Eindhoven
R. Blaauw
Netherlands Institute for Radio Astronomy (ASTRON)
W. N. Brouw
Rijksuniversiteit Groningen
M. Brueggen
Universität Hamburg
B. Ciardi
Max-Planck-Gesellschaft
M. de Vos
Netherlands Institute for Radio Astronomy (ASTRON)
S. Duscha
Netherlands Institute for Radio Astronomy (ASTRON)
R. A. Fallows
Netherlands Institute for Radio Astronomy (ASTRON)
T. M. O. Franzen
Netherlands Institute for Radio Astronomy (ASTRON)
M. A. Garrett
Universiteit Leiden
University of Manchester
A. W. Gunst
Netherlands Institute for Radio Astronomy (ASTRON)
M. Hoeft
Thüringer Landessternwarte Tautenburg
J. R. Hoerandel
National Institute for Subatomic Physics (NIKHEF)
Radboud Universiteit
Vrije Universiteit Brüssel (VUB)
M. Iacobelli
Netherlands Institute for Radio Astronomy (ASTRON)
E. Juette
Ruhr-Universität Bochum
L. V. E. Koopmans
Rijksuniversiteit Groningen
A. Krankowski
University of Warmia and Mazury in Olsztyn
P. Maat
Netherlands Institute for Radio Astronomy (ASTRON)
G. Mann
Leibniz-Gemeinschaft
H. Mulder
Netherlands Institute for Radio Astronomy (ASTRON)
A. Nelles
Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)
Deutsches Elektronen-Synchrotron (DESY)
H. Paas
Rijksuniversiteit Groningen
M. Pandey-Pommier
Université de Lyon
Universite d'Orleans
R. Pekal
Poznan Supercomp & Networking Ctr PCSS
W. Reich
Max-Planck-Gesellschaft
H. J. A. Roettgering
Universiteit Leiden
D. J. Schwarz
Universität Bielefeld
O. Smirnov
Rhodes University
South African Radio Astronomy Observatory (SARAO)
M. Soida
Uniwersytet Jagiellonski w Krakowie
Maria Carmen Toribio Perez
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
M. P. van Haarlem
Netherlands Institute for Radio Astronomy (ASTRON)
R. J. van Weeren
Universiteit Leiden
C. Vocks
Leibniz-Gemeinschaft
O. Wucknitz
Max-Planck-Gesellschaft
P. Zucca
Netherlands Institute for Radio Astronomy (ASTRON)
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 494 4 5110-5117Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
DOI
10.1093/mnras/staa950