2021MNRAS.508.3910C

Query : 2021MNRAS.508.3910C

2021MNRAS.508.3910C - Mon. Not. R. Astron. Soc., 508, 3910-3920 (2021/December-2)

Search for gamma-ray bursts and gravitational wave electromagnetic counterparts with High Energy X-ray Telescope of Insight-HXMT.

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

Abstract (from CDS):

The High Energy (HE) X-ray telescope on board the Hard X-ray Modulation Telescope (Insight-HXMT) can serve as a wide field of view (FOV) gamma-ray monitor with high time resolution (µs) and large effective area (up to thousands cm2). We developed a pipeline to search for gamma-ray bursts (GRBs), using the traditional signal-to-noise ratio (SNR) method for blind search and the coherent search method for targeted search. By taking into account the location and spectrum of the burst and the detector response, the targeted coherent search is more powerful to unveil weak and sub-threshold bursts, especially those in temporal coincidence with gravitational wave (GW) events. Based on the original method in literature, we further improved the coherent search to filter out false triggers caused by spikes in light curves, which are commonly seen in gamma-ray instruments (e.g. Fermi/GBM, POLAR). We show that our improved targeted coherent search method could eliminate almost all false triggers caused by spikes. Based on the first two years of Insight-HXMT/HE data, our targeted search recovered 40 GRBs, which were detected by either Swift/BAT or Fermi/GBM but too weak to be found in our blind search. With this coherent search pipeline, the GRB detection sensitivity of Insight-HXMT/HE is increased to about 1.5E-08 erg cm–2 (200 keV-3 MeV). We also used this targeted coherent method to search Insight-HXMT/HE data for electromagnetic counterparts of LIGO-Virgo GW events (including O2 and O3a runs). However, we did not find any significant burst associated with GW events.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): gravitational waves - methods: observational - gamma-ray bursts

Simbad objects: 53

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Number of rows : 53
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GrW 190814 GWE 00 55.8 -27 05           ~ 433 0
2 GrW 170814 GWE 03 11.0 -44 57           ~ 157 0
3 GRB 170906C gB 08 34 36.85 +70 48 42.0           ~ 15 0
4 GrW 170817 GWE 13 09 48.0850 -23 22 53.343           ~ 2683 0
5 Fermi bn180102660 gB 13 32 16.07 +62 10 19.4           ~ 15 0
6 Fermi bn170906030 gB 13 35 49.24 -47 06 03.4           ~ 33 0
7 GRB 171216A gB 14 07 57.79 -50 29 05.3           ~ 9 0
8 GRB 190401A gB 18 20.3 +30 58           ~ 4 0
9 NAME Sgr 1935+2154 * 19 34 55.68 +21 53 48.2           ~ 820 1
10 FRB 200428 rB 19 35.0 +21 57           ~ 291 0
11 GrW 190503 185404 GWE ~ ~           ~ 40 0
12 GrW 190513 205428 GWE ~ ~           ~ 39 0
13 GrW 190517 055101 GWE ~ ~           ~ 64 0
14 GrW 190521 GWE ~ ~           ~ 409 0
15 GrW 190602 175927 GWE ~ ~           ~ 51 0
16 GrW 190630 185205 GWE ~ ~           ~ 40 0
17 GrW 190706 222641 GWE ~ ~           ~ 55 0
18 GrW 190708 232457 GWE ~ ~           ~ 34 0
19 GrW 190728 GWE ~ ~           ~ 48 0
20 GrW 190803 022701 GWE ~ ~           ~ 34 0
21 GrW 190828 065509 GWE ~ ~           ~ 40 0
22 GrW 190910 112807 GWE ~ ~           ~ 34 0
23 GrW 190929 012149 GWE ~ ~           ~ 35 0
24 GRB 171219A gB ~ ~           ~ 2 0
25 GrW 190424 180648 GWE ~ ~           ~ 21 0
26 GrW 190720 000836 GWE ~ ~           ~ 39 0
27 GrW 190828 063405 GWE ~ ~           ~ 41 0
28 GrW 170729 GWE ~ ~           ~ 127 0
29 GrW 170823 GWE ~ ~           ~ 69 0
30 GrW 190412 GWE ~ ~           ~ 169 0
31 GrW 190413 134308 GWE ~ ~           ~ 32 0
32 GrW 190426 152155 GWE ~ ~           ~ 66 0
33 GrW 190512 180714 GWE ~ ~           ~ 43 0
34 GrW 190514 065416 GWE ~ ~           ~ 26 0
35 GrW 190519 153544 GWE ~ ~           ~ 56 0
36 GrW 190527 092055 GWE ~ ~           ~ 28 0
37 GrW 190620 030421 GWE ~ ~           ~ 49 0
38 GrW 190701 203306 GWE ~ ~           ~ 43 0
39 GrW 190719 215514 GWE ~ ~           ~ 30 0
40 GrW 190731 140936 GWE ~ ~           ~ 32 0
41 GrW 190909 114149 GWE ~ ~           ~ 18 0
42 GrW 190915 235702 GWE ~ ~           ~ 41 0
43 GrW 190930 133541 GWE ~ ~           ~ 44 0
44 GrW 190707 093326 GWE ~ ~           ~ 38 0
45 GrW 190421 213856 GWE ~ ~           ~ 37 0
46 GrW 190521 074359 GWE ~ ~           ~ 40 0
47 GrW 190727 060333 GWE ~ ~           ~ 40 0
48 GrW 190924 021846 GWE ~ ~           ~ 50 0
49 GrW 170809 GWE ~ ~           ~ 69 0
50 GrW 170818 GWE ~ ~           ~ 75 0
51 GrW 190408 181802 GWE ~ ~           ~ 46 0
52 GrW 190413 052954 GWE ~ ~           ~ 29 0
53 GRB 190425 GWE ~ ~           ~ 438 0

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