Gamma-ray astronomy

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VLBI observations of GRB 201015A, a relatively faint GRB with a hint of very high-energy gamma-ray emission

ASTRONOMY & ASTROPHYSICS 664 (2022) ARTN A36

Authors:

S Giarratana, L Rhodes, B Marcote, R Fender, G Ghirlanda, M Giroletti, L Nava, JM Paredes, ME Ravasio, M Ribo, M Patel, J Rastinejad, G Schroeder, W Fong, BP Gompertz, AJ Levan, P O'Brien
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Connecting radio emission to AGN wind properties with broad absorption line quasars

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 515:4 (2022) 5159-5174

Authors:

JW Petley, LK Morabito, DM Alexander, AL Rankine, VA Fawcett, DJ Rosario, JH Matthews, TM Shimwell, A Drabent
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A MeerKAT, e-MERLIN, HESS, and Swift search for persistent and transient emission associated with three localized FRBs

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 515:1 (2022) 1365-1379

Authors:

JO Chibueze, M Caleb, L Spitler, H Ashkar, F Schussler, BW Stappers, C Venter, I Heywood, AMS Richards, DRA Williams, M Kramer, R Beswick, MC Bezuidenhout, RP Breton, LN Driessen, F Jankowski, EF Keane, M Malenta, M Mickaliger, V Morello, H Qiu, K Rajwade, S Sanidas, M Surnis, TW Scragg, CRH Walker, N Wrigley, F Aharonian, F Ait Benkhali, EO Anguener, M Backes, V Baghmanyan, V Barbosa Martins, R Batzofin, Y Becherini, D Berge, M Bottcher, C Boisson, J Bolmont, M de Bony de Lavergne, M Breuhaus, R Brose, F Brun, T Bulik, F Cangemi, S Caroff, S Casanova, J Catalano, M Cerruti, T Chand, A Chen, OU Chibueze, G Cotter, P Cristofari, J Damascene Mbarubucyeye, J Devin, A Djannati-Atai, A Dmytriiev, K Egberts, J-P Ernenwein, A Fiasson, G Fichet de Clairfontaine, G Fontaine, S Funk, S Gabici, S Ghafourizadeh, G Giavitto, D Glawion, M-H Grondin, M Horbe, C Hoischen, TL Holch, Zhiqiu Huang, M Jamrozy, F Jankowsky, V Joshi, I Jung-Richardt, E Kasai, K Katarzynski, U Katz, B Khelifi, W Kluzniak, Nu Komin, K Kosack, D Kostunin, A Lemiere, J-P Lenain, F Leuschner, T Lohse, A Luashvili, I Lypova, J Mackey, D Malyshev, V Marandon, P Marchegiani, A Marcowith, G Marti-Devesa, R Marx, A Mitchell, R Moderski, L Mohrmann, E Moulin, J Muller, 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, RD Parsons, S Pita, V Poireau, DA Prokhorov, H Prokoph, G Puehlhofer, A Quirrenbach, P Reichherzer, A Reimer, O Reimer, G Rowell, B Rudak, E Ruiz-Velasco, V Sahakian, S Sailer, H Salzmann, DA Sanchez, A Santangelo, M Sasaki, HM Schutte, U Schwanke, JNS Shapopi, A Specovius, S Spencer, R Steenkamp, S Steinmassl, T Takahashi, T Tanaka, C Thorpe-Morgan, N Tsuji, C van Eldik, J Veh, J Vink, SJ Wagner, A Wierzcholska, Yu Wun Wong, A Yusafzai, M Zacharias, D Zargaryan, AA Zdziarski, A Zech, SJ Zhu, S Zouari, N Zywucka, HESS Collaboration
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Search for dark matter annihilation signals in the H.E.S.S. Inner Galaxy Survey

(2022)

Authors:

HESS Collaboration, H Abdalla, F Aharonian, F Ait Benkhali, EO Anguner, C Armand, H Ashkar, M Backes, V Baghmanyan, V Barbosa Martins, R Batzofin, Y Becherini, D Berge, K Bernlohr, B Bi, M Bottcher, J Bolmont, M de Bony de Lavergne, R Brose, F Brun, F Cangemi, S Caroff, M Cerruti, T Chand, A Chen, G Cotter, J Damascene Mbarubucyeye, J Devin, A Djannati-Ataı, A Dmytriiev, V Doroshenko, K Egberts, A Fiasson, G Fichet de Clairfontaine, G Fontaine, S Funk, S Gabici, G Giavitto, D Glawion, JF Glicenstein, M-H Grondin, JA Hinton, W Hofmann, TL Holch, M Holler, D Horns, Zhiqiu Huang, M Jamrozy, F Jankowsky, E Kasai, K Katarzynski, U Katz, B Khelifi, W Kluzniak, Nu Komin, K Kosack, D Kostunin, G Lamanna, M Lemoine-Goumard, J-P Lenain, F Leuschner, T Lohse, A Luashvili, I Lypova, J Mackey, D Malyshev, D Malyshev, V Marandon, P Marchegiani, G Martı-Devesa, R Marx, G Maurin, M Meyer, A Mitchell, R Moderski, A Montanari, E Moulin, J Muller, M de Naurois, J Niemiec, A Priyana Noel, S Ohm, L Olivera-Nieto, E de Ona Wilhelmi, M Ostrowski, S Panny, M Panter, RD Parsons, G Peron, V Poireau, H Prokoph, G Puhlhofer, 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, F Schussler, HM Schutte, U Schwanke, M Senniappan, JNS Shapopi, H Sol, A Specovius, S Spencer, L Stawarz, C Stegmann, S Steinmassl, C Steppa, T Takahashi, T Tanaka, R Terrier, C Thorpe-Morgan, M Tluczykont, M Tsirou, N Tsuji, Y Uchiyama, C van Eldik, J Veh, J Vink, SJ Wagner, R White, A Wierzcholska, Yu Wun Wong, M Zacharias, D Zargaryan, AA Zdziarski, A Zech, SJ Zhu, S Zouari, N Zywucka
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The MeerTime Pulsar Timing Array: A census of emission properties and timing potential

Publications of the Astronomical Society of Australia Cambridge University Press 39 (2022) e027

Authors:

R Spiewak, M Bailes, MT Miles, A Parthasarathy, DJ Reardon, M Shamohammadi, RM Shannon, NDR Bhat, S Buchner, AD Cameron, F Camilo, M Geyer, S Johnston, A Karastergiou, M Keith, M Kramer, M Serylak, W van Straten, G Theureau, V Venkatraman Krishnan

Abstract:

The millisecond pulsar J1713+0747 underwent a sudden and significant pulse shape change between April 16 and 17, 2021 (MJDs 59320 and 59321). Subsequently, the pulse shape gradually recovered over the course of several months. We report the results of continued multi-frequency radio observations of the pulsar made using the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and the 100-meter Green Bank Telescope (GBT) in a three-year period encompassing the shape change event, between February 2020 and February 2023. As of February 2023, the pulse shape had returned to a state similar to that seen before the event, but with measurable changes remaining. The amplitude of the shape change and the accompanying TOA residuals display a strong non-monotonic dependence on radio frequency, demonstrating that the event is neither a glitch (the effects of which should be independent of radio frequency, $\nu$) nor a change in dispersion measure (DM) alone (which would produce a delay proportional to $\nu^{-2}$). However, it does bear some resemblance to the two previous "chromatic timing events" observed in J1713+0747 (Demorest et al. 2013; Lam et al. 2016), as well as to a similar event observed in PSR J1643-1224 in 2015 (Shannon et al. 2016).Comment: 19 pages, 8 figures. Submitted to ApJ. Data available at https://doi.org/10.5281/zenodo.723645
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