2020A&A...642A.160G


Query : 2020A&A...642A.160G

2020A&A...642A.160G - Astronomy and Astrophysics, volume 642A, 160-160 (2020/10-1)

Constraining the transient high-energy activity of FRB 180916.J0158+65 with Insight-HXMT follow-up observations.

GUIDORZI C., ORLANDINI M., FRONTERA F., NICASTRO L., XIONG S.L., LIAO J.Y., LI G., ZHANG S.N., AMATI L., VIRGILLI E., ZHANG S., BU Q.C., CAI C., CAO X.L., CHANG Z., CHEN L., CHEN T.X., CHEN Y., CHEN Y.P., CUI W.W., DU Y.Y., GAO G.H., GAO H., GAO M., GE M.Y., GU Y.D., GUAN J., GUO C.C., HAN D.W., HUANG Y., HUO J., JIA S.M., JIANG W.C., JIN J., KONG L.D., LI B., LI C.K., LI T.P., LI W., LI X., LI X.B., LI X.F., LI Z.W., LIANG X.H., LIU B.S., LIU C.Z., LIU H.X., LIU H.W., LIU X.J., LU F.J., LU X.F., LUO Q., LUO T., MA R.C., MA X., MENG B., NANG Y., NIE J.Y., OU G., QU J.L., REN X.Q., SAI N., SONG L.M., SONG X.Y., SUN L., TAN Y., TAO L., TUO Y.L., WANG C., WANG L.J., WANG P.J., WANG W.S., WANG Y.S., WEN X.Y., WU B.Y., WU B.B., WU M., XIAO G.C., XIAO S., XU Y.P., YANG R., YANG S., YANG Y.J., YI Q.B., YIN Q.Q., YOU Y., ZHANG F., ZHANG H.M., ZHANG J., ZHANG P., ZHANG W.C., ZHANG W., ZHANG Y.F., ZHANG Y.H., ZHAO H.S., ZHAO X.F., ZHENG S.J., ZHENG Y.G. and ZHOU D.K.

Abstract (from CDS):


Context. A link has finally been established between magnetars and fast radio burst (FRB) sources. Within this context, a major issue that remains unresolved pertains to whether sources of extragalactic FRBs exhibit X/γ-ray outbursts and whether this is correlated with radio activity. If so, the subsequent goal is to identify these sources.
Aims. We aim to constrain possible X/γ-ray burst activity from one of the nearest extragalactic FRB sources currently known. This is to be done over a broad energy range by looking for bursts over a range of timescales and energies that are compatible with those of powerful flares from extragalactic magnetars.
Methods. We followed up on the observation of the as-yet nearest extragalactic FRB source, located at a mere 149 Mpc distance, namely, the periodic repeater FRB 180916.J0158+65. This took place during the active phase between 4 and 7 February 2020, using the Insight-Hard X-ray Modulation Telescope (Insight-HXMT). By taking advantage of the combination of broad-band wavelengths, a large effective area, and several independent detectors at our disposal, we searched for bursts over a set of timescales from 1ms to 1.024s with a sensitive algorithm that had been previously characterised and optimised. Moreover, through simulations, we studied the sensitivity of our technique in the released energy-duration phase space for a set of synthetic flares and assuming a range of different energy spectra.
Results. We constrain the possible occurrence of flares in the 1-100 keV energy band to E<1046erg for durations Δt<0.1s over several tens of ks exposure.
Conclusions. We can rule out the occurrence of giant flares similar to the ones that were observed in the few cases of Galactic magnetars. The absence of reported radio activity during our observations prevents us from making any determinations regarding the possibility of simultaneous high-energy emission.

Abstract Copyright: © ESO 2020

Journal keyword(s): radiation mechanisms: non-thermal - stars: magnetars

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 FRB 20180916B rB 01 58 00.750 +65 43 00.30           ~ 315 0
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17478 0
3 FRB 20181119D rB 05 31 58.6980 +33 08 52.588           ~ 722 0
4 NAME Sgr 1935+2154 * 19 34 55.68 +21 53 48.2           ~ 588 1
5 FRB 200428 rB 19 35.0 +21 57           ~ 174 0

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