2021ApJ...908...90A

Query : 2021ApJ...908...90A

2021ApJ...908...90A - Astrophys. J., 908, 90-90 (2021/February-2)

MAGIC observations of the nearby short gamma-ray burst GRB 160821B.

ACCIARI V.A., ANSOLDI S., ANTONELLI L.A., ARBET ENGELS A., ASANO K., BAACK D., BABIC A., BAQUERO A., BARRES DE ALMEIDA U., BARRIO J.A., BECERRA GONZALEZ J., BEDNAREK W., BELLIZZI L., BERNARDINI E., BERNARDOS M., BERTI A., BESENRIEDER J., BHATTACHARYYA W., BIGONGIARI C., BILAND A., BLANCH O., BONNOLI G., BOSNJAK Z., BUSETTO G., CAROSI R., CERIBELLA G., CERRUTI M., CHAI Y., CHILINGARIAN A., CIKOTA S., COLAK S.M., 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., DELFINO M., DELGADO J., DELGADO MENDEZ C., DEPAOLI D., DI PIERRO F., DI VENERE L., DO SOUTO ESPINEIRA E., DOMINIS PRESTER D., DONINI A., DORNER D., DORO M., ELSAESSER D., FALLAH RAMAZANI V., FATTORINI A., FERRARA G., FOFFANO L., FONSECA M.V., FONT L., FRUCK C., FUKAMI S., GARCIA LOPEZ R.J., GARCZARCZYK M., GASPARYAN S., GAUG M., GIGLIETTO N., GIORDANO F., GLIWNY P., GODINOVIC N., GREEN J.G., GREEN D., HADASCH D., HAHN A., HECKMANN L., HERRERA J., HOANG J., HRUPEC D., HUTTEN M., INADA T., INOUE S., ISHIO K., IWAMURA Y., JORMANAINEN J., JOUVIN L., KAJIWARA Y., KARJALAINEN M., KERSZBERG D., KOBAYASHI Y., KUBO H., KUSHIDA J., LAMASTRA A., LELAS D., LEONE F., LINDFORS E., LOMBARDI S., LONGO F., LOPEZ-COTO R., LOPEZ-MOYA M., LOPEZ-ORAMAS A., LOPORCHIO S., MACHADO DE OLIVEIRA FRAGA B., MAGGIO C., MAJUMDAR P., MAKARIEV M., MALLAMACI M., MANEVA G., MANGANARO M., MANNHEIM K., MARASCHI L., MARIOTTI M., MARTINEZ M., MAZIN D., MENDER S., MICANOVIC S., MICELI D., MIENER T., MINEV M., MIRANDA J.M., MIRZOYAN R., MOLINA E., MORALEJO A., MORCUENDE D., MORENO V., MORETTI E., NEUSTROEV V., NIGRO C., NILSSON K., NINCI D., NISHIJIMA K., NODA K., NOZAKI S., OHTANI Y., OKA T., OTERO-SANTOS J., PAIANO S., PALATIELLO M., PANEQUE D., PAOLETTI R., PAREDES J.M., PAVLETIC L., PENIL P., PERENNES C., PERSIC M., PRADA MORONI P.G., PRANDINI E., PRIYADARSHI C., PULJAK I., RHODE W., RIBO M., RICO J., RIGHI C., RUGLIANCICH A., SAHA L., SAHAKYAN N., SAITO T., SAKURAI S., SATALECKA K., SATURNI F.G., SCHLEICHER B., SCHMIDT K., SCHWEIZER T., SITAREK J., SNIDARIC I., SOBCZYNSKA D., SPOLON A., STAMERRA A., STROM D., STRZYS M., SUDA Y., SURIC T., TAKAHASHI M., TAVECCHIO F., TEMNIKOV P., TERZIC T., TESHIMA M., TORRES-ALBA N., TOSTI L., TRUZZI S., TUTONE A., VAN SCHERPENBERG J., VANZO G., VAZQUEZ ACOSTA M., VENTURA S., VERGUILOV V., VIGORITO C.F., VITALE V., VOVK I., WILL M., ZARIC D., NAVA L. (The MAGIC Collaboration)

Abstract (from CDS):

The coincident detection of GW170817 in gravitational waves and electromagnetic radiation spanning the radio to MeV gamma-ray bands provided the first direct evidence that short gamma-ray bursts (GRBs) can originate from binary neutron star (BNS) mergers. On the other hand, the properties of short GRBs in high-energy gamma-rays are still poorly constrained, with only ∼20 events detected in the GeV band, and none in the TeV band. GRB 160821B is one of the nearest short GRBs known at z = 0.162. Recent analyses of the multiwavelength observational data of its afterglow emission revealed an optical-infrared kilonova component, characteristic of heavy-element nucleosynthesis in a BNS merger. Aiming to better clarify the nature of short GRBs, this burst was automatically followed up with the MAGIC telescopes, starting from 24 s after the burst trigger. Evidence of a gamma-ray signal is found above ∼0.5 TeV at a significance of ∼ 3σ during observations that lasted until 4 hr after the burst. Assuming that the observed excess events correspond to gamma-ray emission from GRB 160821B, in conjunction with data at other wavelengths, we investigate its origin in the framework of GRB afterglow models. The simplest interpretation with one-zone models of synchrotron-self-Compton emission from the external forward shock has difficulty accounting for the putative TeV flux. Alternative scenarios are discussed where the TeV emission can be relatively enhanced. The role of future GeV-TeV observations of short GRBs in advancing our understanding of BNS mergers and related topics is briefly addressed.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Gamma-ray bursts

Simbad objects: 10

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Number of rows : 10
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 GRB 180720B gB 00 02 06.99 -02 55 07.8           ~ 215 0
2 SN 2019oyw SN* 02 58 10.510 -08 57 27.20           ~ 218 0
3 GRB 190114C gB 03 38 01.18 -26 56 47.8           ~ 343 0
4 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
5 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
6 GRB 160821A gB 11 25 01 +42 20.7           ~ 71 0
7 SDSS J112848.22+170418.5 G 11 28 48.22989 +17 04 18.5014           ~ 393 0
8 GrW 170817 GWE 13 09 48.0850 -23 22 53.343           ~ 2683 0
9 Fermi bn160821937 gB 18 39 54.550 +62 23 30.35           ~ 190 0
10 Fermi bn090510016 G 22 14 12.6230 -26 34 58.550           ~ 548 0

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