MeerKAT

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LOFAR 144-MHz follow-up observations of GW170817

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 494:4 (2020) 5110-5117

Authors:

JW Broderick, TW Shimwell, K Gourdji, A Rowlinson, S Nissanke, K Hotokezaka, PG Jonker, C Tasse, MJ Hardcastle, JBR Oonk, RP Fender, RAMJ Wijers, A Shulevski, AJ Stewart, S ter Veen, VA Moss, MHD van der Wiel, DA Nichols, A Piette, ME Bell, D Carbone, S Corbel, J Eislöffel, J-M Grießmeier, EF Keane, CJ Law, T Muñoz-Darias, M Pietka, M Serylak, AJ van der Horst, J van Leeuwen, R Wijnands, P Zarka, JM Anderson, MJ Bentum, R Blaauw, WN Brouw, M Brüggen, B Ciardi, M de Vos, S Duscha, RA Fallows, TMO Franzen, MA Garrett, AW Gunst, M Hoeft, JR Hörandel, M Iacobelli, E Jütte, LVE Koopmans, A Krankowski, P Maat, G Mann, H Mulder, A Nelles, H Paas, M Pandey-Pommier, R Pekal, W Reich, HJA Röttgering, DJ Schwarz, O Smirnov, M Soida, MC Toribio, MP van Haarlem, RJ van Weeren, C Vocks, O Wucknitz, P Zucca
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A broad-band perspective on circular polarization in radio pulsar observations

Proceedings of the International Astronomical Union Cambridge University Press (CUP) 16:S363 (2020) 332-334
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Radio afterglows of Very High Energy Gamma-ray Bursts

Proceedings of the International Astronomical Union Cambridge University Press (CUP) 16:S363 (2020) 220-223

Authors:

Lauren Rhodes, Alexander van der Horst, Rob Fender
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Recurrent low-level luminosity behaviour after a giant outburst in the Be/X-ray transient 4U 0115+63

Astronomy & Astrophysics EDP Sciences 638 (2020) a152

Authors:

A Rouco Escorial, R Wijnands, J van den Eijnden, A Patruno, N Degenaar, A Parikh, LS Ootes
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Relativistic X-ray jets from the black hole X-ray binary MAXI J1820+070

Astrophysical Journal Letters American Astronomical Society 895:2 (2020) L31

Authors:

Mathilde Espinasse, Stephane Corbel, Philip Kaaret, Evangelia Tremou, Giulia Migliori, Richard M Plotkin, Joe Bright, John Tomsick, Anastasios Tzioumis, Robert Fender, Jerome A Orosz, Elena Gallo, Jeroen Homan, Peter G Jonker, James CA Miller-Jones, David M Russell, Sara Motta

Abstract:

The black hole MAXI J1820+070 was discovered during its 2018 outburst and was extensively monitored across the electromagnetic spectrum. Following the detection of relativistic radio jets, we obtained four Chandra X-ray observations taken between 2018 November and 2019 June, along with radio observations conducted with the Very Large Array and MeerKAT arrays. We report the discovery of X-ray sources associated with the radio jets moving at relativistic velocities with a possible deceleration at late times. The broadband spectra of the jets are consistent with synchrotron radiation from particles accelerated up to very high energies (>10 TeV) by shocks produced by the jets interacting with the interstellar medium. The minimal internal energy estimated from the X-ray observations for the jets is ~10^41 erg, significantly larger than the energy calculated from the radio flare alone, suggesting most of the energy is possibly not radiated at small scales but released through late-time interactions.
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