AGILE Observations of Two Repeating Fast Radio Bursts with Low Intrinsic Dispersion Measures

We focus on two repeating fast radio bursts (FRBs) recently detected by the CHIME/FRB experiment in 2018–2019 (Source 1: 180916.J0158+65, and Source 2: 181030.J1054+73). These sources have low excess dispersion measures ( and , respectively), implying relatively small maximal distances. They were repeatedly observed by AGILE in the MeV–GeV energy range. We do not detect prompt emission simultaneously with these repeating events. This search is particularly significant for the submillisecond and millisecond integrations obtainable by AGILE. The sources are constrained to emit a MeV-fluence in the millisecond range below corresponding to an isotropic energy near erg for a distance of 150 Mpc (applicable to Source 1). We also searched for γ-ray emission for time intervals up to 100 days, obtaining 3σ upper limits (ULs) for the average isotropic luminosity above 50 MeV, (5–10) . For a source distance near 100 kpc (possibly applicable to Source 2), our ULs imply , and 2 . Our results are significant in constraining the high-energy emission of underlying sources such as magnetars, or other phenomena related to extragalactic compact objects, and show the prompt emission to be lower than the peak of the 2004 magnetar outburst of SGR 1806-20 for source distances less than about 100 Mpc.

[1]  Kendrick M. Smith,et al.  A repeating fast radio burst source localized to a nearby spiral galaxy , 2020, Nature.

[2]  AGILE search for gamma-ray counterparts of gravitational wave events , 2019, Rendiconti Lincei. Scienze Fisiche e Naturali.

[3]  R. Margutti,et al.  A cumulative search for hard X/γ-ray emission associated with fast radio bursts in Fermi/GBM data , 2019, Astronomy & Astrophysics.

[4]  M. Halpern,et al.  CHIME / FRB Detection of Eight New Repeating Fast Radio Burst Sources The CHIME / FRB Collaboration , , 2019 .

[5]  Shami Chatterjee,et al.  Fast Radio Bursts: An Extragalactic Enigma , 2019, Annual Review of Astronomy and Astrophysics.

[6]  A. Lien,et al.  A Search for High-energy Counterparts to Fast Radio Bursts , 2019, The Astrophysical Journal.

[7]  B. Metzger,et al.  Fast radio bursts as synchrotron maser emission from decelerating relativistic blast waves , 2019, Monthly Notices of the Royal Astronomical Society.

[8]  J. Prochaska,et al.  Probing Galactic Halos with Fast Radio Bursts , 2019, Monthly Notices of the Royal Astronomical Society.

[9]  M. Tavani,et al.  A New AGILE MCAL Configuration to Detect Gamma-Ray Bursts and Sub-threshold Events in the Multimessenger Era , 2019, The Astrophysical Journal.

[10]  M. Halpern,et al.  A second source of repeating fast radio bursts , 2019, Nature.

[11]  M. Halpern,et al.  Observations of fast radio bursts at frequencies down to 400 megahertz , 2019, Nature.

[12]  R. Lynch,et al.  FRB 121102 Bursts Show Complex Time–Frequency Structure , 2018, The Astrophysical Journal.

[13]  R. Lynch,et al.  An extreme magneto-ionic environment associated with the fast radio burst source FRB 121102 , 2018, Nature.

[14]  L. A. Antonelli,et al.  AGILE Observations of the Gravitational-wave Source GW170817: Constraining Gamma-Ray Emission from an NS–NS Coalescence , 2017, 1710.05460.

[15]  R. Lynch,et al.  Simultaneous X-Ray, Gamma-Ray, and Radio Observations of the Repeating Fast Radio Burst FRB 121102 , 2017, 1705.07824.

[16]  A. Beloborodov.  A Flaring Magnetar in FRB 121102? , 2017, 1702.08644.

[17]  H. J. van Langevelde,et al.  The Repeating Fast Radio Burst FRB 121102 as Seen on Milliarcsecond Angular Scales , 2017, 1701.01099.

[18]  A. Keimpema,et al.  A direct localization of a fast radio burst and its host , 2017, Nature.

[19]  R. N. Manchester,et al.  A NEW ELECTRON-DENSITY MODEL FOR ESTIMATION OF PULSAR AND FRB DISTANCES , 2016, 1610.09448.

[20]  L. A. Antonelli,et al.  AGILE OBSERVATIONS OF THE GRAVITATIONAL-WAVE EVENT GW150914 , 2016, 1604.00955.

[21]  Nrl,et al.  A repeating fast radio burst , 2016, Nature.

[22]  P. N. Bhat,et al.  FERMI GBM OBSERVATIONS OF LIGO GRAVITATIONAL-WAVE EVENT GW150914 , 2016, 1602.03920.

[23]  M. Kramer,et al.  FRBCAT: The Fast Radio Burst Catalogue , 2016, Publications of the Astronomical Society of Australia.

[24]  S. Burke-Spolaor,et al.  Five new fast radio bursts from the HTRU high-latitude survey at Parkes: First evidence for two-component bursts , 2015, 1511.07746.

[25]  M. Trifoglio,et al.  Properties of terrestrial gamma ray flashes detected by AGILE MCAL below 30 MeV , 2014 .

[26]  V. Kaspi,et al.  THE McGILL MAGNETAR CATALOG , 2013, 1309.4167.

[27]  M. Trifoglio,et al.  THE AGILE ALERT SYSTEM FOR GAMMA-RAY TRANSIENTS , 2013, 1401.3573.

[28]  Matthew McQuinn,et al.  LOCATING THE “MISSING” BARYONS WITH EXTRAGALACTIC DISPERSION MEASURE ESTIMATES , 2013, 1309.4451.

[29]  C. Pittori.  AGILE Data Center and AGILE science highlights , 2013 .

[30]  M. Trifoglio,et al.  Evaluating the Maximum Likelihood Method for Detecting Short-Term Variability of AGILE gamma-ray Sources , 2012, 1201.2602.

[31]  F Longo,et al.  Terrestrial gamma-ray flashes as powerful particle accelerators. , 2011, Physical review letters.

[32]  G. Piano,et al.  Detection of terrestrial gamma ray flashes up to 40 MeV by the AGILE satellite , 2010 .

[33]  L. A. Antonelli,et al.  AGILE DETECTION OF DELAYED GAMMA-RAY EMISSION FROM THE SHORT GAMMA-RAY BURST GRB 090510 , 2009, 0908.1908.

[34]  G. Di Cocco,et al.  Design and construction of the Mini-Calorimeter of the AGILE satellite , 2008, 0810.1842.

[35]  L. A. Antonelli,et al.  Gamma-ray burst detection with the AGILE mini-calorimeter , 2008, 0809.3917.

[36]  Massimo Trifoglio,et al.  Search of GRB with AGILE Minicalorimeter , 2008 .

[37]  M. Mclaughlin,et al.  A Bright Millisecond Radio Burst of Extragalactic Origin , 2007, Science.

[38]  M. Feroci,et al.  SuperAGILE: The hard X-ray imager for the AGILE space mission , 2007, 0708.0123.

[39]  M. Mclaughlin,et al.  The Parkes Multibeam Pulsar Survey - VI. Discovery and timing of 142 pulsars and a Galactic population analysis , 2006, astro-ph/0607640.

[40]  V. Kaspi,et al.  Birth and Evolution of Isolated Radio Pulsars , 2005, astro-ph/0512585.

[41]  T. Sakamoto,et al.  Gamma-Ray Observations of a Giant Flare From the Magnetar Sgr 1806-20 , 2005, astro-ph/0503030.

[42]  A. Rau,et al.  An exceptionally bright flare from SGR 1806–20 and the origins of short-duration γ-ray bursts , 2005, Nature.

[43]  M. Tavani,et al.  The AGILE Mission , 2003, 0807.4254.

[44]  E. Vallazza,et al.  The AGILE silicon tracker: testbeam results of the prototype silicon detector , 2002 .

[45]  Christopher Thompson,et al.  The Soft Gamma Repeaters as Very Strongly Magnetized Neutron Stars. II. Quiescent Neutrino, X-Ray, and Alfvén Wave Emission , 1996 .