LOFAR 144-MHz follow-up observations of GW170817

Broderick JW, Shimwell TW, Gourdji K, Rowlinson A, Nissanke S, Hotokezaka K, Jonker PG, Tasse C, Hardcastle MJ, Oonk JBR, Fender RP, et al. (2020)
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 494(4): 5110-5117.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Broderick, J. W.; Shimwell, T. W.; Gourdji, K.; Rowlinson, A.; Nissanke, S.; Hotokezaka, K.; Jonker, P. G.; Tasse, C.; Hardcastle, M. J.; Oonk, J. B. R.; Fender, R. P.; Wijers, R. A. M. J.
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Abstract / Bemerkung
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.
Stichworte
gravitational waves; stars: neutron; radio continuum: stars
Erscheinungsjahr
2020
Zeitschriftentitel
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Band
494
Ausgabe
4
Seite(n)
5110-5117
ISSN
0035-8711
eISSN
1365-2966
Page URI
https://pub.uni-bielefeld.de/record/2944519

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Broderick JW, Shimwell TW, Gourdji K, et al. LOFAR 144-MHz follow-up observations of GW170817. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2020;494(4):5110-5117.
Broderick, J. W., Shimwell, T. W., Gourdji, K., Rowlinson, A., Nissanke, S., Hotokezaka, K., Jonker, P. G., et al. (2020). LOFAR 144-MHz follow-up observations of GW170817. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 494(4), 5110-5117. doi:10.1093/mnras/staa950
Broderick, J. W., Shimwell, T. W., Gourdji, K., Rowlinson, A., Nissanke, S., Hotokezaka, K., Jonker, P. G., Tasse, C., Hardcastle, M. J., Oonk, J. B. R., et al. (2020). LOFAR 144-MHz follow-up observations of GW170817. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 494, 5110-5117.
Broderick, J.W., et al., 2020. LOFAR 144-MHz follow-up observations of GW170817. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 494(4), p 5110-5117.
J.W. Broderick, et al., “LOFAR 144-MHz follow-up observations of GW170817”, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 494, 2020, pp. 5110-5117.
Broderick, J.W., Shimwell, T.W., Gourdji, K., Rowlinson, A., Nissanke, S., Hotokezaka, K., Jonker, P.G., Tasse, C., Hardcastle, M.J., Oonk, J.B.R., Fender, R.P., Wijers, R.A.M.J., Shulevski, A., Stewart, A.J., ter Veen, S., Moss, V.A., van der Wiel, M.H.D., Nichols, D.A., Piette, A., Bell, M.E., Carbone, D., Corbel, S., Eisloeffel, J., Griessmeier, J.-M., Keane, E.F., Law, C.J., Munoz-Darias, T., Pietka, M., Serylak, M., van der Horst, A.J., van Leeuwen, J., Wijnands, R., Zarka, P., Anderson, J.M., Bentum, M.J., Blaauw, R., Brouw, W.N., Brueggen, M., Ciardi, B., de Vos, M., Duscha, S., Fallows, R.A., Franzen, T.M.O., Garrett, M.A., Gunst, A.W., Hoeft, M., Hoerandel, J.R., Iacobelli, M., Juette, E., Koopmans, L.V.E., Krankowski, A., Maat, P., Mann, G., Mulder, H., Nelles, A., Paas, H., Pandey-Pommier, M., Pekal, R., Reich, W., Roettgering, H.J.A., Schwarz, D., Smirnov, O., Soida, M., Toribio, M.C., van Haarlem, M.P., van Weeren, R.J., Vocks, C., Wucknitz, O., Zucca, P.: LOFAR 144-MHz follow-up observations of GW170817. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 494, 5110-5117 (2020).
Broderick, J. W., Shimwell, T. W., Gourdji, K., Rowlinson, A., Nissanke, S., Hotokezaka, K., Jonker, P. G., Tasse, C., Hardcastle, M. J., Oonk, J. B. R., Fender, R. P., Wijers, R. A. M. J., Shulevski, A., Stewart, A. J., ter Veen, S., Moss, V. A., van der Wiel, M. H. D., Nichols, D. A., Piette, A., Bell, M. E., Carbone, D., Corbel, S., Eisloeffel, J., Griessmeier, J-M, Keane, E. F., Law, C. J., Munoz-Darias, T., Pietka, M., Serylak, M., van der Horst, A. J., van Leeuwen, J., Wijnands, R., Zarka, P., Anderson, J. M., Bentum, M. J., Blaauw, R., Brouw, W. N., Brueggen, M., Ciardi, B., de Vos, M., Duscha, S., Fallows, R. A., Franzen, T. M. O., Garrett, M. A., Gunst, A. W., Hoeft, M., Hoerandel, J. R., Iacobelli, M., Juette, E., Koopmans, L. V. E., Krankowski, A., Maat, P., Mann, G., Mulder, H., Nelles, A., Paas, H., Pandey-Pommier, M., Pekal, R., Reich, W., Roettgering, H. J. A., Schwarz, Dominik, Smirnov, O., Soida, M., Toribio, M. C., van Haarlem, M. P., van Weeren, R. J., Vocks, C., Wucknitz, O., and Zucca, P. “LOFAR 144-MHz follow-up observations of GW170817”. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 494.4 (2020): 5110-5117.