The Thousand Pulsar Array programme on MeerKAT – X. Scintillation arcs of 107 pulsars

Monthly Notices of the Royal Astronomical Society Oxford University Press 518:1 (2022) 1086-1097

Authors:

Ra Main, A Parthasarathy, S Johnston, A Karastergiou, A Basu, Ad Cameron, Mj Keith, Lucy Oswald, B Posselt, Dj Reardon, X Song, P Weltevrede

Abstract:

We present the detection of 107 pulsars with interstellar scintillation arcs at 856–1712 MHz, observed with the MeerKAT Thousand Pulsar Array Programme. Scintillation arcs appear to be ubiquitous in clean, high S/N observations, their detection mainly limited by short observing durations and coarse frequency channel resolution. This led the survey to be sensitive to nearby, lightly scattered pulsars with high effective velocity – from a large proper motion, a screen nearby the pulsar, or a screen near the Earth. We measure the arc curvatures in all of our sources, which can be used to give an estimate of screen distances in pulsars with known proper motion, or an estimate of the proper motion. The short scintillation time-scale in J1731−4744 implies a scattering screen within 12 pc of the source, strongly suggesting the association between this pulsar and the supernova remnant RCW 114. We measure multiple parabolic arcs of five pulsars, all of which are weakly scintillating with high proper motion. Additionally, several sources show hints of inverted arclets suggesting scattering from anisotropic screens. Building on this work, further targeted MeerKAT observations of many of these pulsars will improve understanding of our local scattering environment and the origins of scintillation; annual scintillation curves would lead to robust screen distance measurements, and the evolution of arclets in time and frequency can constrain models of scintillation.

Gamma-ray observations of MAXI J1820+070 during the 2018 outburst

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 517:4 (2022) 4736-4751

Authors:

H Abe, S Abe, VA Acciari, T Aniello, S Ansoldi, LA Antonelli, A Arbet Engels, C Arcaro, M Artero, K Asano, D Baack, A Babić, A Baquero, U Barres de Almeida, JA Barrio, I Batković, J Baxter, J Becerra González, W Bednarek, E Bernardini, M Bernardos, A Berti, J Besenrieder, W Bhattacharyya, C Bigongiari, A Biland, O Blanch, G Bonnoli, Ž Bošnjak, I Burelli, G Busetto, R Carosi, M Carretero-Castrillo, G Ceribella, Y Chai, A Chilingarian, S Cikota, E Colombo, JL Contreras, J Cortina, S Covino, G D’Amico, V D’Elia, P Da Vela, F Dazzi, A De Angelis, B De Lotto, A Del Popolo, M Delfino, J Delgado, C Delgado Mendez, D Depaoli, F Di Pierro, L Di Venere, D Dominis Prester, A Donini, D Dorner, M Doro, D Elsaesser, G Emery, V Fallah Ramazani, L Fariña, A Fattorini, L Font, C Fruck, S Fukami, Y Fukazawa, RJ García López, M Garczarczyk, S Gasparyan, M Gaug, JG Giesbrecht Paiva, N Giglietto, F Giordano, P Gliwny, N Godinović, R Grau, D Green, JG Green, D Hadasch, A Hahn, T Hassan, L Heckmann, J Herrera, J Hoang, D Hrupec, M Hütten, R Imazawa, T Inada, R Iotov, K Ishio, I Jiménez Martínez, J Jormanainen, D Kerszberg, Y Kobayashi, H Kubo, J Kushida, A Lamastra, D Lelas, F Leone, E Lindfors, L Linhoff, S Lombardi, F Longo, R López-Coto, M López-Moya, A López-Oramas, S Loporchio, A Lorini, E Lyard, B Machado de Oliveira Fraga, P Majumdar, M Makariev, G Maneva, N Mang, M Manganaro, S Mangano, K Mannheim, M Mariotti, M Martínez, A Mas Aguilar, D Mazin, S Menchiari, S Mender, S Mićanović, D Miceli, T Miener, JM Miranda, R Mirzoyan, E Molina, HA Mondal, A Moralejo, D Morcuende, V Moreno, T Nakamori, C Nanci, L Nava, V Neustroev, M Nievas Rosillo, C Nigro, K Nilsson, K Nishijima, T Njoh Ekoume, K Noda, S Nozaki, Y Ohtani, T Oka, A Okumura, J Otero-Santos, S Paiano, M Palatiello, D Paneque, R Paoletti, JM Paredes, L Pavletić, M Persic, M Pihet, G Pirola, F Podobnik, PG Prada Moroni, E Prandini, G Principe, C Priyadarshi, I Puljak, W Rhode, M Ribó, J Rico, C Righi, A Rugliancich, N Sahakyan, T Saito, S Sakurai, K Satalecka, FG Saturni, B Schleicher, K Schmidt, F Schmuckermaier, JL Schubert, T Schweizer, J Sitarek, V Sliusar, D Sobczynska, A Spolon, A Stamerra, J Strišković, D Strom, M Strzys, Y Suda, T Surić, H Tajima, M Takahashi, R Takeishi, F Tavecchio, P Temnikov, K Terauchi, T Terzić, M Teshima, L Tosti, S Truzzi, A Tutone, S Ubach, J van Scherpenberg, M Vazquez Acosta, S Ventura, V Verguilov, I Viale, CF Vigorito, V Vitale, I Vovk, R Walter, M Will, C Wunderlich, T Yamamoto, D Zarić, The MAGIC Collaboration, H Abdalla, F Aharonian, F Ait Benkhali, EO Angüner, H Ashkar, M Backes, V Baghmanyan, V Barbosa Martins, R Batzofin, Y Becherini, D Berge, K Bernlöhr, M Böttcher, C Boisson, J Bolmont, M de Bony de Lavergne, F Bradascio, M Breuhaus, R Brose, F Brun, T Bulik, T Bylund, F Cangemi, S Caroff, S Casanova, M Cerruti, T Chand, S Chandra, A Chen, OU Chibueze, G Cotter, P Cristofari, J Damascene Mbarubucyeye, J Devin, A Djannati-Ataï, A Dmytriiev, K Egberts, J-P Ernenwein, A Fiasson, G Fichet de Clairfontaine, G Fontaine, M Füßling, S Funk, S Gabici, S Ghafourizadeh, G Giavitto, D Glawion, JF Glicenstein, P Goswami, G Grolleron, JA Hinton, M Hörbe, C Hoischen, TL Holch, M Holler, D Horns, Zhiqiu Huang, M Jamrozy, F Jankowsky, V Joshi, I Jung-Richardt, E Kasai, K Katarzyński, U Katz, B Khélifi, W Kluźniak, Nu Komin, K Kosack, D Kostunin, RG Lang, S Le Stum, A Lemière, M Lemoine-Goumard, J-P Lenain, F Leuschner, T Lohse, A Luashvili, I Lypova, J Mackey, J Majumdar, D Malyshev, D Malyshev, V Marandon, P Marchegiani, G Martí-Devesa, R Marx, G Maurin, M Meyer, A Mitchell, R Moderski, L Mohrmann, A Montanari, E Moulin, J Muller, T Murach, K Nakashima, M de Naurois, A Nayerhoda, J Niemiec, A Priyana Noel, P O’Brien, S Ohm, L Olivera-Nieto, E de Ona Wilhelmi, M Ostrowski, S Panny, M Panter, RD Parsons, V Poireau, DA Prokhorov, H Prokoph, G Pühlhofer, M Punch, A Quirrenbach, P Reichherzer, A Reimer, O Reimer, M Renaud, F Rieger, G Rowell, B Rudak, H Rueda Ricarte, E Ruiz-Velasco, V Sahakian, H Salzmann, A Santangelo, M Sasaki, J Schäfer, F Schüssler, HM Schutte, U Schwanke, JNS Shapopi, H Sol, A Specovius, S Spencer, Ł Stawarz, R Steenkamp, S Steinmassl, C Steppa, I Sushch, H Suzuki, T Takahashi, T Tanaka, C Thorpe-Morgan, M Tluczykont, L Tomankova, N Tsuji, Y Uchiyama, C van Eldik, B van Soelen, M Vecchi, J Veh, C Venter, J Vink, SJ Wagner, R White, A Wierzcholska, Yu Wun Wong, A Yusafzai, M Zacharias, R Zanin, D Zargaryan, AA Zdziarski, A Zech, SJ Zhu, S Zouari, N Żywucka, The HESS Collaboration, A Acharyya, CB Adams, P Batista, W Benbow, M Capasso, JL Christiansen, AJ Chromey, M Errando, A Falcone, Q Feng, JP Finley, JM Foote, L Fortson, A Furniss, A Gent, WF Hanlon, O Hervet, J Holder, B Hona, TB Humensky, W Jin, P Kaaret, M Kertzman, M Kherlakian, TK Kleiner, S Kumar, MJ Lang, M Lundy, G Maier, CE McGrath, J Millis, P Moriarty, R Mukherjee, S O’Brien, RA Ong, N Park, SR Patel, K Pfrang, M Pohl, E Pueschel, J Quinn, K Ragan, PT Reynolds, D Ribeiro, E Roache, JL Ryan, I Sadeh, L Saha, M Santander, GH Sembroski, R Shang, M Splettstoesser, D Tak, JV Tucci, A Weinstein, DA Williams, TJ Williamson, The VERITAS Collaboration, V Bosch-Ramon, C Celma, M Linares, DM Russell, G Sala

The 2019 Outburst of the 2005 Classical Nova V1047 Cen: A Record Breaking Dwarf Nova Outburst or a New Phenomenon?

The Astrophysical Journal American Astronomical Society 939:1 (2022) 6

Authors:

E Aydi, KV Sokolovsky, JS Bright, E Tremou, MM Nyamai, A Evans, J Strader, L Chomiuk, G Myers, F-J Hambsch, KL Page, DAH Buckley, CE Woodward, FM Walter, P Mróz, PJ Vallely, TR Geballe, DPK Banerjee, RD Gehrz, RP Fender, M Gromadzki, A Kawash, C Knigge, K Mukai, U Munari, M Orio, VARM Ribeiro, JL Sokoloski, S Starrfield, A Udalski, PA Woudt

Search and identification of transient and variable radio sources using MeerKAT observations: a case study on the MAXI J1820+070 field

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 517:2 (2022) 2894-2911

Authors:

A Rowlinson, J Meijn, J Bright, AJ van der Horst, S Chastain, S Fijma, R Fender, I Heywood, RAMJ Wijers, PA Woudt, A Andersson, GR Sivakoff, E Tremou, LN Driessen

A refined dynamical mass for the black hole in the X-ray transient XTE J1859+226

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 517:1 (2022) 1476-1482

Authors:

IV Yanes-Rizo, MAP Torres, J Casares, SE Motta, T Muñoz-Darias, P Rodríguez-Gil, M Armas Padilla, F Jiménez-Ibarra, PG Jonker, JM Corral-Santana, R Fender