Strong low-frequency radio flaring from Cygnus X-3 observed with LOFAR

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 504:1 (2021) 1482-1494

Authors:

JW Broderick, TD Russell, RP Fender, SA Trushkin, DA Green, J Chauhan, NA Nizhelskij, PG Tsybulev, NN Bursov, AV Shevchenko, GG Pooley, DRA Williams, JS Bright, A Rowlinson, S Corbel

Particle acceleration in radio galaxies with flickering jets: GeV electrons to ultrahigh energy cosmic rays

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 503:4 (2021) 5948-5964

Authors:

James H Matthews, Andrew M Taylor

Measurement of the Fluctuations in the Number of Muons in Extensive Air Showers with the Pierre Auger Observatory

Physical Review Letters American Physical Society (APS) 126:15 (2021) 152002

Authors:

A Aab, P Abreu, M Aglietta, JM Albury, I Allekotte, A Almela, J Alvarez-Muñiz, R Alves Batista, GA Anastasi, L Anchordoqui, B Andrada, S Andringa, C Aramo, PR Araújo Ferreira, H Asorey, P Assis, G Avila, AM Badescu, A Bakalova, A Balaceanu, F Barbato, RJ Barreira Luz, KH Becker, JA Bellido, C Berat, ME Bertaina, X Bertou, PL Biermann, T Bister, J Biteau, J Blazek, C Bleve, M Boháčová, D Boncioli, C Bonifazi, L Bonneau Arbeletche, N Borodai, AM Botti, J Brack, T Bretz, FL Briechle, P Buchholz, A Bueno, S Buitink, M Buscemi, KS Caballero-Mora, L Caccianiga, A Cancio, F Canfora, I Caracas, JM Carceller, R Caruso, A Castellina, F Catalani, G Cataldi, L Cazon, M Cerda, JA Chinellato, K Choi, J Chudoba, L Chytka, RW Clay, AC Cobos Cerutti, R Colalillo, A Coleman, MR Coluccia, R Conceição, A Condorelli, G Consolati, F Contreras, F Convenga, CE Covault, S Dasso, K Daumiller, BR Dawson, JA Day, RM de Almeida, J de Jesús, SJ de Jong, G De Mauro, JRT de Mello Neto, I De Mitri, J de Oliveira, D de Oliveira Franco, V de Souza, E De Vito, J Debatin, M del Río, O Deligny, H Dembinski, N Dhital, A Di Matteo, C Dobrigkeit, JC D’Olivo, RC dos Anjos, MT Dova, J Ebr, R Engel, I Epicoco, M Erdmann, CO Escobar, A Etchegoyen, H Falcke, J Farmer, G Farrar, AC Fauth, N Fazzini, F Feldbusch, F Fenu, B Fick, JM Figueira, A Filipčič, T Fodran, MM Freire, T Fujii, A Fuster, C Galea, C Galelli, B García, AL Garcia Vegas, H Gemmeke, F Gesualdi, A Gherghel-Lascu, PL Ghia, U Giaccari, M Giammarchi, M Giller, J Glombitza, F Gobbi, F Gollan, G Golup, M Gómez Berisso, PF Gómez Vitale, JP Gongora, N González, I Goos, D Góra, A Gorgi, M Gottowik, TD Grubb, F Guarino, GP Guedes, E Guido, S Hahn, R Halliday, MR Hampel, P Hansen, D Harari, VM Harvey, A Haungs, T Hebbeker, D Heck, GC Hill, C Hojvat, JR Hörandel, P Horvath, M Hrabovský, T Huege, J Hulsman, A Insolia, PG Isar, JA Johnsen, J Jurysek, A Kääpä, KH Kampert, B Keilhauer, J Kemp, HO Klages, M Kleifges, J Kleinfeller, M Köpke, G Kukec Mezek, BL Lago, D LaHurd, RG Lang, N Langner, MA Leigui de Oliveira, V Lenok, A Letessier-Selvon, I Lhenry-Yvon, D Lo Presti, L Lopes, R López, R Lorek, Q Luce, A Lucero, JP Lundquist, A Machado Payeras, G Mancarella, D Mandat, BC Manning, J Manshanden, P Mantsch, S Marafico, AG Mariazzi, IC Mariş, G Marsella, D Martello, H Martinez, O Martínez Bravo, M Mastrodicasa, HJ Mathes, J Matthews, G Matthiae, E Mayotte, PO Mazur, G Medina-Tanco, D Melo, A Menshikov, K-D Merenda, S Michal, MI Micheletti, L Miramonti, S Mollerach, F Montanet, C Morello, M Mostafá, AL Müller, MA Muller, K Mulrey, R Mussa, M Muzio, WM Namasaka, L Nellen, M Niculescu-Oglinzanu, M Niechciol, D Nitz, D Nosek, V Novotny, L Nožka, A Nucita, LA Núñez, M Palatka, J Pallotta, P Papenbreer, G Parente, A Parra, M Pech, F Pedreira, J Pȩkala, R Pelayo, J Peña-Rodriguez, J Perez Armand, M Perlin, L Perrone, S Petrera, T Pierog, M Pimenta, V Pirronello, M Platino, B Pont, M Pothast, P Privitera, M Prouza, A Puyleart, S Querchfeld, J Rautenberg, D Ravignani, M Reininghaus, J Ridky, F Riehn, M Risse, P Ristori, V Rizi, W Rodrigues de Carvalho, J Rodriguez Rojo, MJ Roncoroni, M Roth, E Roulet, AC Rovero, P Ruehl, SJ Saffi, A Saftoiu, F Salamida, H Salazar, G Salina, JD Sanabria Gomez, F Sánchez, EM Santos, E Santos, F Sarazin, R Sarmento, C Sarmiento-Cano, R Sato, P Savina, CM Schäfer, V Scherini, H Schieler, M Schimassek, M Schimp, F Schlüter, D Schmidt, O Scholten, P Schovánek, FG Schröder, S Schröder, J Schulte, SJ Sciutto, M Scornavacche, RC Shellard, G Sigl, G Silli, O Sima, R Šmída, P Sommers, JF Soriano, J Souchard, R Squartini, M Stadelmaier, D Stanca, S Stanič, J Stasielak, P Stassi, A Streich, M Suárez-Durán, T Sudholz, T Suomijärvi, AD Supanitsky, J Šupík, Z Szadkowski, A Taboada, A Tapia, C Timmermans, O Tkachenko, P Tobiska, CJ Todero Peixoto, B Tomé, G Torralba Elipe, A Travaini, P Travnicek, C Trimarelli, M Trini, M Tueros, R Ulrich, M Unger, L Vaclavek, M Vacula, JF Valdés Galicia, I Valiño, L Valore, E Varela, V Varma K C., A Vásquez-Ramírez, D Veberič, C Ventura, ID Vergara Quispe, V Verzi, J Vicha, J Vink, S Vorobiov, H Wahlberg, AA Watson, M Weber, A Weindl, L Wiencke, H Wilczyński, T Winchen, M Wirtz, D Wittkowski, B Wundheiler, A Yushkov, O Zapparrata, E Zas, D Zavrtanik, M Zavrtanik, L Zehrer, A Zepeda

The Thousand-Pulsar-Array programme on MeerKAT - V. Scattering analysis of single-component pulsars

Monthly Notices of the Royal Astronomical Society Oxford University Press 504:1 (2021) 1115-1128

Authors:

Ls Oswald, A Karastergiou, B Posselt, S Johnston, M Bailes, S Buchner, M Geyer, Mj Keith, M Kramer, A Parthasarathy, Dj Reardon, M Serylak, Rm Shannon, R Spiewak, W van Straten, V Venkatraman Krishnan

Abstract:

We have measured the scattering time-scale, τ, and the scattering spectral index, α, for 84 single-component pulsars. Observations were carried out with the MeerKAT telescope as part of the Thousand-Pulsar-Array programme in the MeerTime project at frequencies between 0.895 and 1.670 GHz. Our results give a distribution of values for α (defined in terms of τ and frequency ν as τ ∝ ν−α) for which, upon fitting a Gaussian, we obtain a mean and standard deviation of 〈α〉 = 4.0 ± 0.6. This is due to our identification of possible causes of inaccurate measurement of τ, which, if not filtered out of modelling results, tend to lead to underestimation of α. The pulsars in our sample have large dispersion measures and are therefore likely to be distant. We find that a model using an isotropic scatter broadening function is consistent with the data, likely due to the averaging effect of multiple scattering screens along the line of sight. Our sample of scattering parameters provides a strong data set upon which we can build to test more complex and time-dependent scattering phenomena, such as extreme scattering events.

Strong low-frequency radio flaring from Cygnus X-3 observed with LOFAR

(2021)

Authors:

JW Broderick, TD Russell, RP Fender, SA Trushkin, DA Green, J Chauhan, NA Nizhelskij, PG Tsybulev, NN Bursov, AV Shevchenko, GG Pooley, DRA Williams, JS Bright, A Rowlinson, S Corbel