Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory

Physical Review D American Physical Society (APS) 93:7 (2016) 072006

Authors:

A Aab, P Abreu, M Aglietta, EJ Ahn, I Al Samarai, IFM Albuquerque, I Allekotte, P Allison, A Almela, J Alvarez Castillo, J Alvarez-Muñiz, R Alves Batista, M Ambrosio, L Anchordoqui, B Andrada, S Andringa, C Aramo, F Arqueros, N Arsene, H Asorey, P Assis, J Aublin, G Avila, N Awal, AM Badescu, C Baus, JJ Beatty, KH Becker, JA Bellido, C Berat, ME Bertaina, X Bertou, PL Biermann, P Billoir, SG Blaess, A Blanco, J Blazek, C Bleve, H Blümer, M Boháčová, D Boncioli, C Bonifazi, N Borodai, AM Botti, J Brack, I Brancus, T Bretz, A Bridgeman, FL Briechle, P Buchholz, A Bueno, S Buitink, M Buscemi, KS Caballero-Mora, B Caccianiga, L Caccianiga, A Cancio, M Candusso, L Caramete, R Caruso, A Castellina, G Cataldi, L Cazon, R Cester, AG Chavez, A Chiavassa, JA Chinellato, JC Chirinos Diaz, J Chudoba, RW Clay, R Colalillo, A Coleman, L Collica, MR Coluccia, R Conceição, F Contreras, MJ Cooper, S Coutu, CE Covault, J Cronin, R Dallier, S D’Amico, B Daniel, S Dasso, K Daumiller, BR Dawson, RM de Almeida, SJ de Jong, G De Mauro, JRT de Mello Neto, I De Mitri, J de Oliveira, V de Souza, J Debatin, O Deligny, N Dhital, C Di Giulio, A Di Matteo, ML Díaz Castro, F Diogo, C Dobrigkeit, W Docters, JC D’Olivo, A Dorofeev, RC dos Anjos, MT Dova, A Dundovic, J Ebr, R Engel, M Erdmann, M Erfani, CO Escobar, J Espadanal, A Etchegoyen, H Falcke, K Fang, G Farrar, AC Fauth, N Fazzini, AP Ferguson, B Fick, JM Figueira, A Filevich, A Filipčič, O Fratu, MM Freire, T Fujii, A Fuster, F Gallo, B García, D Garcia-Pinto, F Gate, H Gemmeke, A Gherghel-Lascu, PL Ghia, U Giaccari, M Giammarchi, M Giller, D Głas, C Glaser, H Glass, G Golup, M Gómez Berisso, PF Gómez Vitale, N González, B Gookin, J Gordon, A Gorgi, P Gorham, P Gouffon, N Griffith, AF Grillo, TD Grubb, F Guarino, GP Guedes, MR Hampel, P Hansen, D Harari, TA Harrison, JL Harton, Q Hasankiadeh, A Haungs, T Hebbeker, D Heck, P Heimann, AE Herve, GC Hill, C Hojvat, N Hollon, E Holt, P Homola, JR Hörandel, P Horvath, M Hrabovský, T Huege, A Insolia, PG Isar, I Jandt, S Jansen, C Jarne, JA Johnsen, M Josebachuili, A Kääpä, O Kambeitz, KH Kampert, P Kasper, I Katkov, B Keilhauer, E Kemp, RM Kieckhafer, HO Klages, M Kleifges, J Kleinfeller, R Krause, N Krohm, D Kuempel, G Kukec Mezek, N Kunka, A Kuotb Awad, D LaHurd, L Latronico, M Lauscher, P Lautridou, P Lebrun, MA Leigui de Oliveira, A Letessier-Selvon, I Lhenry-Yvon, K Link, L Lopes, R López, A López Casado, A Lucero, M Malacari, M Mallamaci, D Mandat, P Mantsch, AG Mariazzi, V Marin, IC Mariş, G Marsella, D Martello, H Martinez, O Martínez Bravo, JJ Masías Meza, HJ Mathes, S Mathys, J Matthews, JAJ Matthews, G Matthiae, D Maurizio, E Mayotte, PO Mazur, C Medina, G Medina-Tanco, VBB Mello, D Melo, A Menshikov, S Messina, MI Micheletti, L Middendorf, IA Minaya, L Miramonti, B Mitrica, L Molina-Bueno, S Mollerach, F Montanet, C Morello, M Mostafá, CA Moura, G Müller, MA Muller, S Müller, I Naranjo, S Navas, P Necesal, L Nellen, A Nelles, J Neuser, PH Nguyen, M Niculescu-Oglinzanu, M Niechciol, L Niemietz, T Niggemann, D Nitz, D Nosek, V Novotny, H Nožka, LA Núñez, L Ochilo, F Oikonomou, A Olinto, D Pakk Selmi-Dei, M Palatka, J Pallotta, P Papenbreer, G Parente, A Parra, T Paul, M Pech, J Pękala, R Pelayo, J Peña-Rodriguez, IM Pepe, LAS Pereira, L Perrone, E Petermann, C Peters, S Petrera, J Phuntsok, R Piegaia, T Pierog, P Pieroni, M Pimenta, V Pirronello, M Platino, M Plum, C Porowski, RR Prado, P Privitera, M Prouza, EJ Quel, S Querchfeld, S Quinn, J Rautenberg, O Ravel, D Ravignani, D Reinert, B Revenu, J Ridky, M Risse, P Ristori, V Rizi, W Rodrigues de Carvalho, J Rodriguez Rojo, D Rogozin, J Rosado, M Roth, E Roulet, AC Rovero, SJ Saffi, A Saftoiu, H Salazar, A Saleh, F Salesa Greus, G Salina, JD Sanabria Gomez, F Sánchez, P Sanchez-Lucas, EM Santos, E Santos, F Sarazin, B Sarkar, R Sarmento, C Sarmiento-Cano, R Sato, C Scarso, M Schauer, V Scherini, H Schieler, D Schmidt, O Scholten, H Schoorlemmer, P Schovánek, FG Schröder, A Schulz, J Schulz, J Schumacher, SJ Sciutto, A Segreto, M Settimo, A Shadkam, RC Shellard, G Sigl, O Sima, A Śmiałkowski, R Šmída, GR Snow, P Sommers, S Sonntag, J Sorokin, R Squartini, D Stanca, S Stanič, J Stapleton, J Stasielak, F Strafella, A Stutz, F Suarez, M Suarez Durán, T Sudholz, T Suomijärvi, AD Supanitsky, MS Sutherland, J Swain, Z Szadkowski, OA Taborda, A Tapia, A Tepe, VM Theodoro, C Timmermans, CJ Todero Peixoto, L Tomankova, B Tomé, A Tonachini, G Torralba Elipe, D Torres Machado, P Travnicek, M Trini, R Ulrich, M Unger, M Urban, JF Valdés Galicia, I Valiño, L Valore, G van Aar, P van Bodegom, AM van den Berg, A van Vliet, E Varela, B Vargas Cárdenas, G Varner, R Vasquez, JR Vázquez, RA Vázquez, D Veberič, V Verzi, J Vicha, M Videla, L Villaseñor, S Vorobiov, H Wahlberg, O Wainberg, D Walz, AA Watson, M Weber, A Weindl, L Wiencke, H Wilczyński, T Winchen, D Wittkowski, B Wundheiler, S Wykes, L Yang, T Yapici, D Yelos, A Yushkov, E Zas, D Zavrtanik, M Zavrtanik, A Zepeda, B Zimmermann, M Ziolkowski, Z Zong, F Zuccarello

Furiously Fast and Red: Sub-second Optical Flaring in V404 Cyg during the 2015 Outburst Peak

(2016)

Authors:

P Gandhi, SP Littlefair, LK Hardy, VS Dhillon, TR Marsh, AW Shaw, D Altamirano, MD Caballero-Garcia, J Casares, P Casella, AJ Castro-Tirado, PA Charles, Y Dallilar, S Eikenberry, RP Fender, RI Hynes, C Knigge, E Kuulkers, K Mooley, T Muñoz-Darias, M Pahari, F Rahoui, DM Russell, JV Hernández Santisteban, T Shahbaz, DM Terndrup, J Tomsick, DJ Walton

A large light-mass component of cosmic rays at 10^{17} - 10^{17.5} eV from radio observations

(2016)

Authors:

S Buitink, A Corstanje, H Falcke, JR Hörandel, T Huege, A Nelles, JP Rachen, L Rossetto, P Schellart, O Scholten, S ter Veen, S Thoudam, TNG Trinh, J Anderson, A Asgekar, IM Avruch, ME Bell, MJ Bentum, G Bernardi, P Best, A Bonafede, F Breitling, JW Broderick, WN Brouw, M Brüggen, HR Butcher, D Carbone, B Ciardi, JE Conway, F de Gasperin, E de Geus, A Deller, R-J Dettmar, G van Diepen, S Duscha, J Eislöffel, D Engels, JE Enriquez, RA Fallows, R Fender, C Ferrari, W Frieswijk, MA Garrett, JM Griessmeier, AW Gunst, MP van Haarlem, TE Hassall, G Heald, JWT Hessels, M Hoeft, A Horneffer, M Iacobelli, H Intema, E Juette, A Karastergiou, VI Kondratiev, M Kramer, M Kuniyoshi, G Kuper, J van Leeuwen, GM Loose, P Maat, G Mann, S Markoff, R McFadden, D McKay-Bukowski, JP McKean, M Mevius, DD Mulcahy, H Munk, MJ Norden, E Orru, H Paas, M Pandey-Pommier, VN Pandey, M Pietka, R Pizzo, AG Polatidis, W Reich, HJA Röttgering, AMM Scaife, DJ Schwarz, M Serylak, J Sluman, O Smirnov, BW Stappers, M Steinmetz, A Stewart, J Swinbank, M Tagger, Y Tang, C Tasse, MC Toribio, R Vermeulen, C Vocks, C Vogt, RJ van Weeren, RAMJ Wijers, SJ Wijnholds, MW Wise, O Wucknitz, S Yatawatta, P Zarka, JA Zensus

A clean sightline to quiescence: multiwavelength observations of the high Galactic latitude black hole X-ray binary Swift J1357.2−0933

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 456:3 (2016) 2707-2716

Authors:

Richard M Plotkin, Elena Gallo, Peter G Jonker, James CA Miller-Jones, Jeroen Homan, Teo Muñoz-Darias, Sera Markoff, Montserrat Armas Padilla, Rob Fender, Anthony P Rushton, David M Russell, Manuel AP Torres

A large light-mass component of cosmic rays at 10(17)-10(17.5) electronvolts from radio observations

Nature Springer Nature (2016)

Authors:

S Buitink, A Corstanje, H Falcke, Hörandel, T Huege, A Nelles, JP Rachen, L Rossetto, P Schellart, O Scholten, S Ter Ter Veen, S Thoudam, TNG Trinh, J Anderson, A Asgekar, IM Avruch, ME Bell, MJ Bentum, G Bernardi, P Best, A Bonafede, F Breitling, JW Broderick, WN Brouw, M Brüggen, HR Butcher, D Carbone, B Ciardi, JE Conway, F De Gasperin, E De Geus, A Deller, R-J Dettmar, G Van Diepen, S Duscha, J Eislöffel, D Engels, JE Enriquez, RA Fallows, Robert Fender, C Ferrari, W Frieswijk, MA Garrett, JM Grießmeier, AW Gunst, MP Van Haarlem, TE Hassall, G Heald, JWT Hessels, M Hoeft

Abstract:

Cosmic rays are the highest-energy particles found in nature. Measurements of the mass composition of cosmic rays with energies of 10(17)-10(18) electronvolts are essential to understanding whether they have galactic or extragalactic sources. It has also been proposed that the astrophysical neutrino signal comes from accelerators capable of producing cosmic rays of these energies. Cosmic rays initiate air showers--cascades of secondary particles in the atmosphere-and their masses can be inferred from measurements of the atmospheric depth of the shower maximum (Xmax; the depth of the air shower when it contains the most particles) or of the composition of shower particles reaching the ground. Current measurements have either high uncertainty, or a low duty cycle and a high energy threshold. Radio detection of cosmic rays is a rapidly developing technique for determining Xmax (refs 10, 11) with a duty cycle of, in principle, nearly 100 per cent. The radiation is generated by the separation of relativistic electrons and positrons in the geomagnetic field and a negative charge excess in the shower front. Here we report radio measurements of Xmax with a mean uncertainty of 16 grams per square centimetre for air showers initiated by cosmic rays with energies of 10(17)-10(17.5) electronvolts. This high resolution in Xmax enables us to determine the mass spectrum of the cosmic rays: we find a mixed composition, with a light-mass fraction (protons and helium nuclei) of about 80 per cent. Unless, contrary to current expectations, the extragalactic component of cosmic rays contributes substantially to the total flux below 10(17.5) electronvolts, our measurements indicate the existence of an additional galactic component, to account for the light composition that we measured in the 10(17)-10(17.5) electronvolt range.