skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: AGILE Observations of the Gravitational-wave Source GW170104

Abstract

The LIGO/Virgo Collaboration (LVC) detected on 2017 January 4 a significant gravitational-wave (GW) event (now named GW170104). We report in this Letter the main results obtained from the analysis of hard X-ray and gamma-ray data of the AGILE mission that repeatedly observed the GW170104 localization region (LR). At the LVC detection time T {sub 0} AGILE observed about 36% of the LR. The gamma-ray imaging detector did not reveal any significant emission in the energy range 50 MeV–30 GeV. Furthermore, no significant gamma-ray transients were detected in the LR that was repeatedly exposed over timescales of minutes, hours, and days. We also searched for transient emission using data near T {sub 0} of the omnidirectional detector MCAL operating in the energy band 0.4–100 MeV. A refined analysis of MCAL data shows the existence of a weak event (that we call “E2”) with a signal-to-noise ratio of 4.4 σ lasting about 32 ms and occurring 0.46 ± 0.05 s before T {sub 0}. A study of the MCAL background and of the false-alarm rate of E2 leads to the determination of a post-trial significance between 2.4σ and 2.7σ for a temporal coincidence with GW170104. We note that E2 has characteristics similarmore » to those detected from the weak precursor of GRB 090510. The candidate event E2 is worth consideration for simultaneous detection by other satellites. If associated with GW170104, it shows emission in the MeV band of a short burst preceding the final coalescence by 0.46 s and involving ∼10{sup −7} of the total rest mass energy of the system.« less

Authors:
; ;  [1]; ; ; ; ; ; ;  [2];  [3]; ; ; ;  [4];  [5];  [6];  [7];  [8];  [9] more »; « less
  1. ASI Space Science Data Center (SSDC), via del Politecnico, I-00133 Roma (Italy)
  2. INAF-IAPS, via del Fosso del Cavaliere 100, I-00133 Roma (Italy)
  3. ASI, via del Politecnico snc, I-00133 Roma (Italy)
  4. INAF-IASF-Bologna, via Gobetti 101, I-40129 Bologna (Italy)
  5. Birkeland Centre for Space Science, Department of Physics and Technology, University of Bergen, Bergen (Norway)
  6. INAF-IASF Milano, via E.Bassini 15, I-20133 Milano (Italy)
  7. Dipartimento di Fisica, Università di Trieste and INFN, via Valerio 2, I-34127 Trieste (Italy)
  8. Unitat de Física de les Radiacions, Departament de Física, and CERES-IEEC, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Spain)
  9. INAF, Osservatorio Astronomico di Cagliari, via della Scienza 5, I-09047 Selargius (Italy)
Publication Date:
OSTI Identifier:
22654379
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 847; 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; COALESCENCE; DETECTION; EMISSION; GAMMA RADIATION; GEV RANGE; GRAVITATIONAL WAVES; HARD X RADIATION; MEV RANGE; PRECURSOR; REST MASS; SATELLITES; SIGNAL-TO-NOISE RATIO

Citation Formats

Verrecchia, F., Pittori, C., Lucarelli, F., Tavani, M., Ursi, A., Argan, A., Evangelista, Y., Minervini, G., Cardillo, M., Piano, G., Donnarumma, I., Bulgarelli, A., Fuschino, F., Labanti, C., Fioretti, V., Marisaldi, M., Giuliani, A., Longo, F., Munar-Adrover, P., Pilia, M., and and others. AGILE Observations of the Gravitational-wave Source GW170104. United States: N. p., 2017. Web. doi:10.3847/2041-8213/AA8224.
Verrecchia, F., Pittori, C., Lucarelli, F., Tavani, M., Ursi, A., Argan, A., Evangelista, Y., Minervini, G., Cardillo, M., Piano, G., Donnarumma, I., Bulgarelli, A., Fuschino, F., Labanti, C., Fioretti, V., Marisaldi, M., Giuliani, A., Longo, F., Munar-Adrover, P., Pilia, M., & and others. AGILE Observations of the Gravitational-wave Source GW170104. United States. doi:10.3847/2041-8213/AA8224.
Verrecchia, F., Pittori, C., Lucarelli, F., Tavani, M., Ursi, A., Argan, A., Evangelista, Y., Minervini, G., Cardillo, M., Piano, G., Donnarumma, I., Bulgarelli, A., Fuschino, F., Labanti, C., Fioretti, V., Marisaldi, M., Giuliani, A., Longo, F., Munar-Adrover, P., Pilia, M., and and others. Sun . "AGILE Observations of the Gravitational-wave Source GW170104". United States. doi:10.3847/2041-8213/AA8224.
@article{osti_22654379,
title = {AGILE Observations of the Gravitational-wave Source GW170104},
author = {Verrecchia, F. and Pittori, C. and Lucarelli, F. and Tavani, M. and Ursi, A. and Argan, A. and Evangelista, Y. and Minervini, G. and Cardillo, M. and Piano, G. and Donnarumma, I. and Bulgarelli, A. and Fuschino, F. and Labanti, C. and Fioretti, V. and Marisaldi, M. and Giuliani, A. and Longo, F. and Munar-Adrover, P. and Pilia, M. and and others},
abstractNote = {The LIGO/Virgo Collaboration (LVC) detected on 2017 January 4 a significant gravitational-wave (GW) event (now named GW170104). We report in this Letter the main results obtained from the analysis of hard X-ray and gamma-ray data of the AGILE mission that repeatedly observed the GW170104 localization region (LR). At the LVC detection time T {sub 0} AGILE observed about 36% of the LR. The gamma-ray imaging detector did not reveal any significant emission in the energy range 50 MeV–30 GeV. Furthermore, no significant gamma-ray transients were detected in the LR that was repeatedly exposed over timescales of minutes, hours, and days. We also searched for transient emission using data near T {sub 0} of the omnidirectional detector MCAL operating in the energy band 0.4–100 MeV. A refined analysis of MCAL data shows the existence of a weak event (that we call “E2”) with a signal-to-noise ratio of 4.4 σ lasting about 32 ms and occurring 0.46 ± 0.05 s before T {sub 0}. A study of the MCAL background and of the false-alarm rate of E2 leads to the determination of a post-trial significance between 2.4σ and 2.7σ for a temporal coincidence with GW170104. We note that E2 has characteristics similar to those detected from the weak precursor of GRB 090510. The candidate event E2 is worth consideration for simultaneous detection by other satellites. If associated with GW170104, it shows emission in the MeV band of a short burst preceding the final coalescence by 0.46 s and involving ∼10{sup −7} of the total rest mass energy of the system.},
doi = {10.3847/2041-8213/AA8224},
journal = {Astrophysical Journal Letters},
number = 2,
volume = 847,
place = {United States},
year = {Sun Oct 01 00:00:00 EDT 2017},
month = {Sun Oct 01 00:00:00 EDT 2017}
}