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5 results on '"Chibueze, O. U."'

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

Author

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

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

MAXI J1820+070 is a low-mass X-ray binary with a black hole as a compact object. This binary underwent an exceptionally bright X-ray outburst from March to October 2018, showing evidence of a non-thermal particle population through its radio emission during this whole period. The combined results of 59.5 hours of observations of the MAXI J1820+070 outburst with the H.E.S.S., MAGIC and VERITAS experiments at energies above 200 GeV are presented, together with Fermi-LAT data between 0.1 and 500 GeV, and multiwavelength observations from radio to X-rays. Gamma-ray emission is not detected from MAXI J1820+070, but the obtained upper limits and the multiwavelength data allow us to put meaningful constraints on the source properties under reasonable assumptions regarding the non-thermal particle population and the jet synchrotron spectrum. In particular, it is possible to show that, if a high-energy gamma-ray emitting region is present during the hard state of the source, its predicted flux should be at most a factor of 20 below the obtained Fermi-LAT upper limits, and closer to them for magnetic fields significantly below equipartition. During the state transitions, under the plausible assumption that electrons are accelerated up to ~ 500 GeV, the multiwavelength data and the gamma-ray upper limits lead consistently to the conclusion that a potential high-energy and very-high-energy gamma-ray emitting region should be located at a distance from the black hole ranging between 10^11 and 10^13 cm. Similar outbursts from low-mass X-ray binaries might be detectable in the near future with upcoming instruments such as CTA., Comment: 15 pages, 5 figures. Accepted for publication in MNRAS

Published
2022
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2. A MeerKAT, e-MERLIN, H.E.S.S. and Swift search for persistent and transient emission associated with three localised FRBs

Author

Chibueze, James O., Caleb, M., Spitler, L., Ashkar, H., Schussler, F., Stappers, B. W., Venter, C., Heywood, I., Richards, A. M. S., Williams, D. R. A., Kramer, M., Beswick, R., Bezuidenhout, M. C., Breton, R. P., Driessen, L. N., Jankowski, F., Keane, E. F., Malenta, M., Mickaliger, M., Morello, V., Qiu, H., Rajwade, K., Sanidas, S., Surnis, M., Scragg, T. W., Walker, C. R. H., Wrigley, N., Collaboration, H. E. S. S., Aharonian, F., Benkhali, F. Ait, Anguner, E. O., Backes, M., Baghmanyan, V., Martins, V. Barbosa, Batzofin, R., Becherini, Y., Berge, D., Bottcher, M., Boisson, C., Bolmont, J., de Lavergne, M. de Bony, Breuhaus, M., Brose, R., Brun, F., Bulik, T., Cangemi, F., Caroff, S., Casanova, S., Catalano, J., Cerruti, M., Chand, T., Chen, A., Chibueze, O. U., Cotter, G., Cristofari, P., Mbarubucyeye, J. Damascene, Devin, J., Atai, A. Djannati, Dmytriiev, A., Egberts, K., Ernenwein, J. P., Fiasson, A., de Clairfontaine, G. Fichet, Fontaine, G., Funk, S., Gabici, S., Ghafourizadeh, S., Giavitto, G., Glawion, D., Grondin, M. H., Horbe, M., Hoischen, C., Holch, T. L., Huang, Zhiqiu, Jamrozy, M., Jankowsky, F., Richardt, I. Jung, Kasai, E., Katarzynski, K., Katz, U., Khelifi, B., Kluzniak, W., Komin, Nu., Kosack, K., Kostunin, D., Lemiere, A., Lenain, J. P., Leuschner, F., Lohse, T., Luashvili, A., Lypova, I., Mackey, J., Malyshev, D., Marandon, V., Marchegiani, P., Marcowith, A., Devesa, G. Marti, Marx, R., Mitchell, A., Moderski, R., Mohrmann, L., Moulin, E., Muller, J., Nakashima, K., de Naurois, M., Nayerhoda, A., Niemiec, J., Noel, A. Priyana, O'Brien, P., Ohm, S., Nieto, L. Olivera, Wilhelmi, E. de Ona, Ostrowski, M., Panny, S., Parsons, R. D., Pita, S., Poireau, V., Prokhorov, D. A., Prokoph, H., Puhlhofer, G., Quirrenbach, A., Reichherzer, P., Reimer, A., Reimer, O., Rowell, G., Rudak, B., Velasco, E. Ruiz, Sahakian, V., Sailer, S., Salzmann, H., Sanchez, D. A., Santangelo, A., Sasaki, M., Schutte, H. M., Schwanke, U., Shapopi, J. N. S., Specovius, A., Spencer, S., Steenkamp, R., Steinmassl, S., Takahashi, T., Tanaka, T., Morgan, C. Thorpe, Tsuji, N., van Eldik, C., Veh, J., Vink, J., Wagner, S. J., Wierzcholska, A., Wong, Yu Wun, Yusafzai, A., Zacharias, M., Zargaryan, D., Zdziarski, A. A., Zech, A., Zhu, S. J., Zouari, S., and Zywucka, N.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies
Abstract

We report on a search for persistent radio emission from the one-off Fast Radio Burst (FRB) 20190714A, as well as from two repeating FRBs, 20190711A and 20171019A, using the MeerKAT radio telescope. For FRB 20171019A we also conducted simultaneous observations with the High Energy Stereoscopic System (H.E.S.S.) in very high energy gamma rays and searched for signals in the ultraviolet, optical, and X-ray bands. For this FRB, we obtain a UV flux upper limit of 1.39x10^-16 erg/cm^-2/s/Amstrong, X-ray limit of ~ 6.6x10^-14 erg/cm^-2/s and a limit on the very-high-energy gamma-ray flux (Phi) (E > 120 GeV) < 1.7 x 10^-12 erg/cm^-2/s. We obtain a radio upper limit of ~15 microJy/beam for persistent emission at the locations of both FRBs 20190711A and 20171019A, but detect diffuse radio emission with a peak brightness of ~53 microJy/beam associated with FRB 20190714A at z = 0.2365. This represents the first detection of the radio continuum emission potentially associated with the host (galaxy) of FRB 20190714A, and is only the third known FRB to have such an association. Given the possible association of a faint persistent source, FRB 20190714A may potentially be a repeating FRB whose age lies between that of FRB 20121102A and FRB 20180916A. A parallel search for repeat bursts from these FRBs revealed no new detections down to a fluence of 0.08 Jy ms for a 1 ms duration burst., Comment: 15 pages, 9 figures

Published
2021
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3. A MeerKAT, e-MERLIN, H.E.S.S., and Swift search for persistent and transient emission associated with three localized FRBs

Author

Chibueze, J O, primary, Caleb, M, additional, Spitler, L, additional, Ashkar, H, additional, Schüssler, F, additional, Stappers, B W, additional, Venter, C, additional, Heywood, I, additional, Richards, A M S, additional, Williams, D R A, additional, Kramer, M, additional, Beswick, R, additional, Bezuidenhout, M C, additional, Breton, R P, additional, Driessen, L N, additional, Jankowski, F, additional, Keane, E F, additional, Malenta, M, additional, Mickaliger, M, additional, Morello, V, additional, Qiu, H, additional, Rajwade, K, additional, Sanidas, S, additional, Surnis, M, additional, Scragg, T W, additional, Walker, C R H, additional, Wrigley, N, additional, Aharonian, H E S S Collaboration: F, additional, Ait Benkhali, F, additional, Angüner, E O, additional, Backes, M, additional, Baghmanyan, V, additional, Barbosa Martins, V, additional, Batzofin, R, additional, Becherini, Y, additional, Berge, D, additional, Böttcher, M, additional, Boisson, C, additional, Bolmont, J, additional, de Bony de Lavergne, M, additional, Breuhaus, M, additional, Brose, R, additional, Brun, F, additional, Bulik, T, additional, Cangemi, F, additional, Caroff, S, additional, Casanova, S, additional, Catalano, J, additional, Cerruti, M, additional, Chand, T, additional, Chen, A, additional, Chibueze, O U, additional, Cotter, G, additional, Cristofari, P, additional, Damascene Mbarubucyeye, J, additional, Devin, J, additional, Djannati-Ataï, A, additional, Dmytriiev, A, additional, Egberts, K, additional, Ernenwein, J-P, additional, Fiasson, A, additional, Fichet de Clairfontaine, G, additional, Fontaine, G, additional, Funk, S, additional, Gabici, S, additional, Ghafourizadeh, S, additional, Giavitto, G, additional, Glawion, D, additional, Grondin, M-H, additional, Hörbe, M, additional, Hoischen, C, additional, Holch, T L, additional, Huang, Zhiqiu, additional, Jamrozy, M, additional, Jankowsky, F, additional, Joshi, V, additional, Jung-Richardt, I, additional, Kasai, E, additional, Katarzyński, K, additional, Katz, U, additional, Khélifi, B, additional, Kluźniak, W, additional, Komin, Nu, additional, Kosack, K, additional, Kostunin, D, additional, Lemière, A, additional, Lenain, J-P, additional, Leuschner, F, additional, Lohse, T, additional, Luashvili, A, additional, Lypova, I, additional, Mackey, J, additional, Malyshev, D, additional, Marandon, V, additional, Marchegiani, P, additional, Marcowith, A, additional, Martí-Devesa, G, additional, Marx, R, additional, Mitchell, A, additional, Moderski, R, additional, Mohrmann, L, additional, Moulin, E, additional, Muller, J, additional, Nakashima, K, additional, de Naurois, M, additional, Nayerhoda, A, additional, Niemiec, J, additional, Priyana Noel, A, additional, O’Brien, P, additional, Ohm, S, additional, Olivera-Nieto, L, additional, de Ona Wilhelmi, E, additional, Ostrowski, M, additional, Panny, S, additional, Parsons, R D, additional, Pita, S, additional, Poireau, V, additional, Prokhorov, D A, additional, Prokoph, H, additional, Pühlhofer, G, additional, Quirrenbach, A, additional, Reichherzer, P, additional, Reimer, A, additional, Reimer, O, additional, Rowell, G, additional, Rudak, B, additional, Ruiz-Velasco, E, additional, Sahakian, V, additional, Sailer, S, additional, Salzmann, H, additional, Sanchez, D A, additional, Santangelo, A, additional, Sasaki, M, additional, Schutte, H M, additional, Schwanke, U, additional, Shapopi, J N S, additional, Specovius, A, additional, Spencer, S, additional, Steenkamp, R, additional, Steinmassl, S, additional, Takahashi, T, additional, Tanaka, T, additional, Thorpe-Morgan, C, additional, Tsuji, N, additional, van Eldik, C, additional, Veh, J, additional, Vink, J, additional, Wagner, S J, additional, Wierzcholska, A, additional, Wong, Yu Wun, additional, Yusafzai, A, additional, Zacharias, M, additional, Zargaryan, D, additional, Zdziarski, A A, additional, Zech, A, additional, Zhu, S J, additional, Zouari, S, additional, and Żywucka, N, additional

Published
2022
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4. A MeerKAT, e-MERLIN, HESS, and Swift search for persistent and transient emission associated with three localized FRBs

Author

Chibueze, J. O., Caleb, M., Spitler, L., Ashkar, H., Schussler, F., Stappers, B. W., Venter, C., Heywood, I, Richards, A. M. S., Williams, D. R. A., Kramer, M., Beswick, R., Bezuidenhout, M. C., Breton, R. P., Driessen, L. N., Jankowski, F., Keane, E. F., Malenta, M., Mickaliger, M., Morello, V, Qiu, H., Rajwade, K., Sanidas, S., Surnis, M., Scragg, T. W., Walker, C. R. H., Wrigley, N., Aharonian, F., Benkhali, F. Ait, Anguener, E. O., Backes, M., Baghmanyan, V, Martins, V. Barbosa, Batzofin, R., Becherini, Yvonne, Berge, D., Bottcher, M., Boisson, C., Bolmont, J., de Lavergne, M. de Bony, Breuhaus, M., Brose, R., Brun, F., Bulik, T., Cangemi, F., Caroff, S., Casanova, S., Catalano, J., Cerruti, M., Chand, T., Chen, A., Chibueze, O. U., Cotter, G., Cristofari, P., Mbarubucyeye, J. Damascene, Devin, J., Djannati-Atai, A., Dmytriiev, A., Egberts, K., Ernenwein, J-P, Fiasson, A., de Clairfontaine, G. Fichet, Fontaine, G., Funk, S., Gabici, S., Ghafourizadeh, S., Giavitto, G., Glawion, D., Grondin, M-H, Horbe, M., Hoischen, C., Holch, T. L., Huang, Zhiqiu, Jamrozy, M., Jankowsky, F., Joshi, V, Jung-Richardt, I, Kasai, E., Katarzynski, K., Katz, U., Khelifi, B., Kluzniak, W., Komin, Nu, Kosack, K., Kostunin, D., Lemiere, A., Lenain, J-P, Leuschner, F., Lohse, T., Luashvili, A., Lypova, I, Mackey, J., Malyshev, D., Marandon, V, Marchegiani, P., Marcowith, A., Marti-Devesa, G., Marx, R., Mitchell, A., Moderski, R., Mohrmann, L., Moulin, E., Muller, J., Nakashima, K., de Naurois, M., Nayerhoda, A., Niemiec, J., Noel, A. Priyana, O'Brien, P., Ohm, S., Olivera-Nieto, L., Wilhelmi, E. de Ona, Ostrowski, M., Panny, S., Parsons, R. D., Pita, S., Poireau, V, Prokhorov, D. A., Prokoph, H., Puehlhofer, G., Quirrenbach, A., Reichherzer, P., Reimer, A., Reimer, O., Rowell, G., Rudak, B., Ruiz-Velasco, E., Sahakian, V, Sailer, S., Salzmann, H., Sanchez, D. A., Santangelo, A., Sasaki, M., Schutte, H. M., Schwanke, U., Shapopi, J. N. S., Specovius, A., Spencer, S., Steenkamp, R., Steinmassl, S., Takahashi, T., Tanaka, T., Thorpe-Morgan, C., Tsuji, N., van Eldik, C., Veh, J., Vink, J., Wagner, S. J., Wierzcholska, A., Wong, Yu Wun, Yusafzai, A., Zacharias, M., Zargaryan, D., Zdziarski, A. A., Zech, A., Zhu, S. J., Zouari, S., Zywucka, N., Chibueze, J. O., Caleb, M., Spitler, L., Ashkar, H., Schussler, F., Stappers, B. W., Venter, C., Heywood, I, Richards, A. M. S., Williams, D. R. A., Kramer, M., Beswick, R., Bezuidenhout, M. C., Breton, R. P., Driessen, L. N., Jankowski, F., Keane, E. F., Malenta, M., Mickaliger, M., Morello, V, Qiu, H., Rajwade, K., Sanidas, S., Surnis, M., Scragg, T. W., Walker, C. R. H., Wrigley, N., Aharonian, F., Benkhali, F. Ait, Anguener, E. O., Backes, M., Baghmanyan, V, Martins, V. Barbosa, Batzofin, R., Becherini, Yvonne, Berge, D., Bottcher, M., Boisson, C., Bolmont, J., de Lavergne, M. de Bony, Breuhaus, M., Brose, R., Brun, F., Bulik, T., Cangemi, F., Caroff, S., Casanova, S., Catalano, J., Cerruti, M., Chand, T., Chen, A., Chibueze, O. U., Cotter, G., Cristofari, P., Mbarubucyeye, J. Damascene, Devin, J., Djannati-Atai, A., Dmytriiev, A., Egberts, K., Ernenwein, J-P, Fiasson, A., de Clairfontaine, G. Fichet, Fontaine, G., Funk, S., Gabici, S., Ghafourizadeh, S., Giavitto, G., Glawion, D., Grondin, M-H, Horbe, M., Hoischen, C., Holch, T. L., Huang, Zhiqiu, Jamrozy, M., Jankowsky, F., Joshi, V, Jung-Richardt, I, Kasai, E., Katarzynski, K., Katz, U., Khelifi, B., Kluzniak, W., Komin, Nu, Kosack, K., Kostunin, D., Lemiere, A., Lenain, J-P, Leuschner, F., Lohse, T., Luashvili, A., Lypova, I, Mackey, J., Malyshev, D., Marandon, V, Marchegiani, P., Marcowith, A., Marti-Devesa, G., Marx, R., Mitchell, A., Moderski, R., Mohrmann, L., Moulin, E., Muller, J., Nakashima, K., de Naurois, M., Nayerhoda, A., Niemiec, J., Noel, A. Priyana, O'Brien, P., Ohm, S., Olivera-Nieto, L., Wilhelmi, E. de Ona, Ostrowski, M., Panny, S., Parsons, R. D., Pita, S., Poireau, V, Prokhorov, D. A., Prokoph, H., Puehlhofer, G., Quirrenbach, A., Reichherzer, P., Reimer, A., Reimer, O., Rowell, G., Rudak, B., Ruiz-Velasco, E., Sahakian, V, Sailer, S., Salzmann, H., Sanchez, D. A., Santangelo, A., Sasaki, M., Schutte, H. M., Schwanke, U., Shapopi, J. N. S., Specovius, A., Spencer, S., Steenkamp, R., Steinmassl, S., Takahashi, T., Tanaka, T., Thorpe-Morgan, C., Tsuji, N., van Eldik, C., Veh, J., Vink, J., Wagner, S. J., Wierzcholska, A., Wong, Yu Wun, Yusafzai, A., Zacharias, M., Zargaryan, D., Zdziarski, A. A., Zech, A., Zhu, S. J., Zouari, S., and Zywucka, N.

Abstract

We report on a search for persistent radio emission from the one-off fast radio burst (11(B) 20190714A, as well as from two repeating FRBs, 20190711A and 20171019A, using the MeerKAT radio telescope. For FRB 20171019A, we also conducted simultaneous observations with the High-Energy Stereoscopic System (H.E.S.S.) in very high-energy gamma rays and searched for signals in the ultraviolet, optical, and X-ray bands. For this FRB, we obtain a UV flux upper limit of 1.39 x 10(-16) erg cm(-2) s(-1) angstrom(-1), X-ray limit of similar to 6.6 x 10(-14) erg cm(-2) s(-1) and a limit on the very high energy gamma-ray flux Phi(E > 120 GeV) < 1.7 x 10(-12) erg cm(-2) S-1. We obtain a radio upper limit of similar to 15 mu Jy beam(-1) for persistent emission at the locations of both FRBs 20190711A and 20171019A with MeerKAT. However, we detected an almost unresolved (ratio of integrated flux to peak flux is similar to 1.7 beam) radio emission, where the synthesized beam size was similar to 8 arcsec size with a peak brightness of similar to 53 mu Jy beam(-1) at MeerKAT and similar to 86 mu Jy beam(-1) at e-MERLIN, possibly associated with FRB 20190714A at z = 0.2365. This represents the first detection of persistent continuum radio emission potentially associated with a (as-yet) non- repeating FRB. If the association is confirmed, one of the strongest remaining distinction between repeaters and non-repeaters would no longer be applicable. A parallel search for repeat bursts from these FRBs revealed no new detections down to a fluence of 0.08 Jy ms for a 1 ms duration burst.

Published
2022
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5. A MeerKAT, e-MERLIN, H.E.S.S. and Swift search for persistent and transient emission associated with three localised FRBs

Author

Chibueze, J. O., Caleb, M., Spitler, L., Ashkar, H., Schüssler, F., Stappers, B. W., Venter, C., Heywood, I., Richards, A. M. S., Williams, D. R. A., Kramer, M., Beswick, R., Bezuidenhout, M. C., Breton, R. P., Driessen, L. N., Jankowski, F., Keane, E. F., Malenta, M., Mickaliger, M., Morello, V., Qiu, H., Rajwade, K., Sanidas, S., Surnis, M., Scragg, T. W., Walker, C. R. H., Wrigley, N., Aharonian, F., Benkhali, F. Ait, Angüner, E. O., Backes, M., Baghmanyan, V., Martins, V. Barbosa, Batzofin, R., Becherini, Y., Berge, David, Böttcher, M., Boisson, C., Bolmont, J., de Bony de Lavergne, M., Breuhaus, M., Brose, R., Brun, F., Bulik, T., Cangemi, F., Caroff, S., Casanova, S., Catalano, J., Cerruti, M., Chand, T., Chen, A., Chibueze, O. U., Cotter, G., Cristofari, P., Mbarubucyeye, Jean Damascene, Devin, J., Djannati-Ataï, A., Dmytriiev, A., Egberts, K., Ernenwein, J.-P., Fiasson, A., Fichet de Clairfontaine, G., Fontaine, G., Funk, S., Gabici, S., Ghafourizadeh, S., Giavitto, G., Glawion, D., Grondin, M.-H., Hörbe, M., Hoischen, C., Holch, T. L., Huang, Zhiqiu, Jamrozy, M., Jankowsky, F., Jung-Richardt, I., Kasai, E., Katarzyński, K., Katz, U., Khélifi, B., Kluźniak, W., Komin, Nu., Kosack, K., Kostunin, D., Lemière, A., Lenain, J.-P., Leuschner, F., Lohse, T., Luashvili, A., Lypova, I., Mackey, J., Malyshev, D., Marandon, V., Marchegiani, P., Marcowith, A., Martí-Devesa, G., Marx, R., Mitchell, A., Moderski, R., Mohrmann, L., Moulin, E., Muller, J., Nakashima, K., de Naurois, M., Nayerhoda, A., Niemiec, J., Noel, A. Priyana, O'Brien, P., Ohm, S., Olivera-Nieto, L., de Ona Wilhelmi, Emma Maria, Ostrowski, M., Panny, S., Parsons, R. D., Pita, S., Poireau, V., Prokhorov, D. A., Prokoph, H., Pühlhofer, G., Quirrenbach, A., Reichherzer, P., Reimer, A., Reimer, O., Rowell, G., Rudak, B., Ruiz-Velasco, E., Sahakian, V., Sailer, S., Salzmann, H., Sanchez, D. A., Santangelo, A., Sasaki, M., Schutte, H. M., Schwanke, U., Shapopi, J. N. S., Specovius, A., Spencer, S., Steenkamp, R., Steinmassl, S., Takahashi, T., Tanaka, T., Thorpe-Morgan, C., Tsuji, N., van Eldik, C., Veh, J., Vink, J., Wagner, S. J., Wierzcholska, A., Wong, Yu Wun, Yusafzai, A., Zacharias, M., Zargaryan, D., Zdziarski, A. A., Zech, A., Zhu, S. J., Zouari, S., Żywucka, N., and H. E. S. S. Collaboration

Subjects
radio continuum: galaxies, astro-ph.HE, astro-ph.GA, (transients:) fast radio burst, radiation mechanisms: non-thermal
Abstract

Oxford : Oxford Univ. Press (2022). doi:10.1093/mnras/stac1601, We report on a search for persistent radio emission from the one-off fast radio burst (FRB) 20190714A, as well as from two repeating FRBs, 20190711A and 20171019A, using the MeerKAT radio telescope. For FRB 20171019A, we also conducted simultaneous observations with the High-Energy Stereoscopic System (H.E.S.S.) in very high-energy gamma rays and searched for signals in the ultraviolet, optical, and X-ray bands. For this FRB, we obtain a UV flux upper limit of |$1.39 \times 10^{-16}~{\rm erg\, cm^{-2}\, s^{-1}}$|Å^−1, X-ray limit of |$\sim 6.6 \times 10^{-14}~{\rm erg\, cm^{-2}\, s^{-1}}$| and a limit on the very high energy gamma-ray flux |$\Phi (E\gt 120\, {\rm GeV}) \lt 1.7\times 10^{-12}\, \mathrm{erg\, cm^{-2}\, s^{-1}}$|⁠. We obtain a radio upper limit of ∼15 |$\mu$|Jy beam^−1 for persistent emission at the locations of both FRBs 20190711A and 20171019A with MeerKAT. However, we detected an almost unresolved (ratio of integrated flux to peak flux is ∼1.7 beam) radio emission, where the synthesized beam size was ∼ 8 arcsec size with a peak brightness of |$\sim 53\, \mu$|Jy beam^−1 at MeerKAT and |$\sim 86\, \mu$|Jy beam^−1 at e-MERLIN, possibly associated with FRB 20190714A at z = 0.2365. This represents the first detection of persistent continuum radio emission potentially associated with a (as-yet) non-repeating FRB. If the association is confirmed, one of the strongest remaining distinction between repeaters and non-repeaters would no longer be applicable. A parallel search for repeat bursts from these FRBs revealed no new detections down to a fluence of 0.08 Jy ms for a 1 ms duration burst., Published by Oxford Univ. Press, Oxford

Published
2021

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