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Title: INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational-wave Event GW170817

Abstract

We report the INTernational Gamma-ray Astrophysics Laboratory ( INTEGRAL ) detection of the short gamma-ray burst GRB 170817A (discovered by Fermi -GBM) with a signal-to-noise ratio of 4.6, and, for the first time, its association with the gravitational waves (GWs) from binary neutron star (BNS) merging event GW170817 detected by the LIGO and Virgo observatories. The significance of association between the gamma-ray burst observed by INTEGRAL and GW170817 is 3.2σ, while the association between the Fermi -GBM and INTEGRAL detections is 4.2σ. GRB 170817A was detected by the SPI-ACS instrument about 2 s after the end of the GW event. We measure a fluence of (1.4 ± 0.4 ± 0.6) × 10{sup −7} erg cm{sup −2} (75–2000 keV), where, respectively, the statistical error is given at the 1σ confidence level, and the systematic error corresponds to the uncertainty in the spectral model and instrument response. We also report on the pointed follow-up observations carried out by INTEGRAL , starting 19.5 hr after the event, and lasting for 5.4 days. We provide a stringent upper limit on any electromagnetic signal in a very broad energy range, from 3 keV to 8 MeV, constraining the soft gamma-ray afterglow flux to <7.1 ×more » 10{sup −11} erg cm{sup −2} s{sup −1} (80–300 keV). Exploiting the unique capabilities of INTEGRAL , we constrained the gamma-ray line emission from radioactive decays that are expected to be the principal source of the energy behind a kilonova event following a BNS coalescence. Finally, we put a stringent upper limit on any delayed bursting activity, for example, from a newly formed magnetar.« less

Authors:
; ; ;  [1];  [2]; ; ;  [3]; ;  [4]; ;  [5];  [6]; ;  [7];  [8]; ;  [9];  [10];  [11] more »; « less
  1. ISDC, Department of Astronomy, University of Geneva, Chemin d’Écogia, 16 CH-1290 Versoix (Switzerland)
  2. European Space Research and Technology Centre (ESA/ESTEC), Keplerlaan 1, 2201 AZ Noordwijk (Netherlands)
  3. INAF-Institute for Space Astrophysics and Planetology, Via Fosso del Cavaliere 100, I-00133-Rome (Italy)
  4. DTU Space, National Space Institute Elektrovej, Building 327 DK-2800 Kongens Lyngby (Denmark)
  5. Max-Planck-Institut für Extraterrestrische Physik, Garching (Germany)
  6. Centro de Astrobiología (CAB-CSIC/INTA, ESAC Campus), Camino bajo del Castillo S/N, E-28692 Villanueva de la Cañada, Madrid (Spain)
  7. Space Science Group, School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland)
  8. IRAP, Université de Toulouse, CNRS, UPS, CNES, 9 Av. Roche, F-31028 Toulouse (France)
  9. APC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris Sorbonne Paris Cité, 10 rue Alice Domont et Léonie Duquet, F-75205 Paris Cedex 13 (France)
  10. Space Research Institute of Russian Academy of Sciences, Profsoyuznaya 84/32, 117997 Moscow (Russian Federation)
  11. INAF, IASF-Milano, via E.Bassini 15, I-20133 Milano (Italy)
Publication Date:
OSTI Identifier:
22654364
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 848; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AFTERGLOW; ASTROPHYSICS; COALESCENCE; COSMIC GAMMA BURSTS; DETECTION; EMISSION; GAMMA RADIATION; GRAVITATIONAL WAVES; KEV RANGE; MEV RANGE; NEUTRON STARS; NOISE; NUCLEAR DECAY; SIGNAL-TO-NOISE RATIO

Citation Formats

Savchenko, V., Ferrigno, C., Bozzo, E., Courvoisier, T. J.-L., Kuulkers, E., Bazzano, A., Natalucci, L., Rodi, J., Brandt, S., Chenevez, J., Diehl, R., Von Kienlin, A., Domingo, A., Hanlon, L., Martin-Carrillo, A., Jourdain, E., Laurent, P., Lebrun, F., Lutovinov, A., Mereghetti, S., and and others. INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational-wave Event GW170817. United States: N. p., 2017. Web. doi:10.3847/2041-8213/AA8F94.
Savchenko, V., Ferrigno, C., Bozzo, E., Courvoisier, T. J.-L., Kuulkers, E., Bazzano, A., Natalucci, L., Rodi, J., Brandt, S., Chenevez, J., Diehl, R., Von Kienlin, A., Domingo, A., Hanlon, L., Martin-Carrillo, A., Jourdain, E., Laurent, P., Lebrun, F., Lutovinov, A., Mereghetti, S., & and others. INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational-wave Event GW170817. United States. doi:10.3847/2041-8213/AA8F94.
Savchenko, V., Ferrigno, C., Bozzo, E., Courvoisier, T. J.-L., Kuulkers, E., Bazzano, A., Natalucci, L., Rodi, J., Brandt, S., Chenevez, J., Diehl, R., Von Kienlin, A., Domingo, A., Hanlon, L., Martin-Carrillo, A., Jourdain, E., Laurent, P., Lebrun, F., Lutovinov, A., Mereghetti, S., and and others. Fri . "INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational-wave Event GW170817". United States. doi:10.3847/2041-8213/AA8F94.
@article{osti_22654364,
title = {INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational-wave Event GW170817},
author = {Savchenko, V. and Ferrigno, C. and Bozzo, E. and Courvoisier, T. J.-L. and Kuulkers, E. and Bazzano, A. and Natalucci, L. and Rodi, J. and Brandt, S. and Chenevez, J. and Diehl, R. and Von Kienlin, A. and Domingo, A. and Hanlon, L. and Martin-Carrillo, A. and Jourdain, E. and Laurent, P. and Lebrun, F. and Lutovinov, A. and Mereghetti, S. and and others},
abstractNote = {We report the INTernational Gamma-ray Astrophysics Laboratory ( INTEGRAL ) detection of the short gamma-ray burst GRB 170817A (discovered by Fermi -GBM) with a signal-to-noise ratio of 4.6, and, for the first time, its association with the gravitational waves (GWs) from binary neutron star (BNS) merging event GW170817 detected by the LIGO and Virgo observatories. The significance of association between the gamma-ray burst observed by INTEGRAL and GW170817 is 3.2σ, while the association between the Fermi -GBM and INTEGRAL detections is 4.2σ. GRB 170817A was detected by the SPI-ACS instrument about 2 s after the end of the GW event. We measure a fluence of (1.4 ± 0.4 ± 0.6) × 10{sup −7} erg cm{sup −2} (75–2000 keV), where, respectively, the statistical error is given at the 1σ confidence level, and the systematic error corresponds to the uncertainty in the spectral model and instrument response. We also report on the pointed follow-up observations carried out by INTEGRAL , starting 19.5 hr after the event, and lasting for 5.4 days. We provide a stringent upper limit on any electromagnetic signal in a very broad energy range, from 3 keV to 8 MeV, constraining the soft gamma-ray afterglow flux to <7.1 × 10{sup −11} erg cm{sup −2} s{sup −1} (80–300 keV). Exploiting the unique capabilities of INTEGRAL , we constrained the gamma-ray line emission from radioactive decays that are expected to be the principal source of the energy behind a kilonova event following a BNS coalescence. Finally, we put a stringent upper limit on any delayed bursting activity, for example, from a newly formed magnetar.},
doi = {10.3847/2041-8213/AA8F94},
journal = {Astrophysical Journal Letters},
number = 2,
volume = 848,
place = {United States},
year = {Fri Oct 20 00:00:00 EDT 2017},
month = {Fri Oct 20 00:00:00 EDT 2017}
}