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

J. O. Chibueze , M. Caleb , L. Spitler , H. Ashkar , F. Schüssler , B. W. Stappers , C. Venter , I. Heywood , A. M. S. Richards , D. R. A. Williams , M. Kramer , R. Beswick , M. C. Bezuidenhout , R. P. Breton , L. N. Driessen , F. Jankowski , E. F. Keane , M. Malenta , M. Mickaliger , V. Morello , H. Qiu , K. Rajwade , S. Sanidas , M. Surnis , T. W. Scragg , C. R. H. Walker , N. Wrigley , F. Aharonian , F. Ait Benkhali , E. O. Angüner (1) , M. Backes , V. Baghmanyan , V. Barbosa Martins , R. Batzofin , Y. Becherini (2) , D. Berge , M. Böttcher , C. Boisson (3) , J. Bolmont (4) , M. de Bony de Lavergne (5) , M. Breuhaus , R. Brose , F. Brun , T. Bulik , F. Cangemi (4) , S. Caroff (4) , S. Casanova , J. Catalano , M. Cerruti (2) , T. Chand , A. Chen , O. U. Chibueze , G. Cotter , P. Cristofari (3) , J. Damascene Mbarubucyeye , J. Devin (6) , A. Djannati-Ataï (2) , A. Dmytriiev , K. Egberts , J. -P. Ernenwein (1) , A. Fiasson (5) , G. Fichet de Clairfontaine (3) , G. Fontaine , S. Funk , S. Gabici (2) , S. Ghafourizadeh , G. Giavitto , D. Glawion , M. -H. Grondin (6) , M. Hörbe , C. Hoischen , T. L. Holch , Zhiqiu Huang , M. Jamrozy , F. Jankowsky , V. Joshi , I. Jung-Richardt , E. Kasai , K. Katarzyński , U. Katz , B. Khélifi (2) , W. Kluźniak , Nu Komin , K. Kosack , D. Kostunin , A. Lemière (2) , J. -P. Lenain (4) , F. Leuschner , T. Lohse , A. Luashvili (3) , I. Lypova , J. Mackey , D. Malyshev , V. Marandon , P. Marchegiani , A. Marcowith (7) , G. Martí-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 , R. D. Parsons , S. Pita (2) , V. Poireau (5) , D. A. Prokhorov , H. Prokoph , G. Pühlhofer , A. Quirrenbach , P. Reichherzer , A. Reimer , O. Reimer , G. Rowell , B. Rudak , E. Ruiz-Velasco , V. Sahakian , S. Sailer , H. Salzmann , D. A. Sanchez (5) , A. Santangelo , M. Sasaki , H. M. Schutte , U. Schwanke , J. N. S. 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 , S. J. Wagner , A. Wierzcholska , Yu Wun Wong , A. Yusafzai , M. Zacharias (3) , D. Zargaryan , A. A. Zdziarski , A. Zech (3) , S. J. Zhu , S. Zouari (2) , N. Żywucka

1 CPPM - Centre de Physique des Particules de Marseille
2 APC (UMR_7164) - AstroParticule et Cosmologie
3 LUTH (UMR_8102) - Laboratoire Univers et Théories
4 LPNHE (UMR_7585) - Laboratoire de Physique Nucléaire et de Hautes Énergies
5 LAPP - Laboratoire d'Annecy de Physique des Particules
6 UB - Université de Bordeaux
7 LUPM - Laboratoire Univers et Particules de Montpellier

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 × 10^-16erg cm^-2 s^-1Å^-1, X-ray limit of ~6.6 × 10^-14erg cm^-2 s^-1 and a limit on the very-high-energy gamma-ray flux Φ(E > 120 GeV) < 1.7 × 10^-12 erg cm^-2 s^-1. We obtain a radio upper limit of ~15μJy 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″-size with a peak brightness of ~53 μJy beam^-1 at MeerKAT and ~86 μJy 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.

Keywords: fast radio bursts; radio continuum: galaxies; radiation mechanisms: non-thermal

Domains: Sciences of the Universe [physics]

J. O. Chibueze, M. Caleb, L. Spitler, H. Ashkar, F. Schüssler, et al.. A MeerKAT, e-MERLIN, H.E.S.S. and Swift search for persistent and transient emission associated with three localised FRBs. Monthly Notices of the Royal Astronomical Society, 2022, 515 (1), pp.1365-1379. ⟨10.1093/mnras/stac1601⟩. ⟨insu-03713226⟩