CALET Upper Limits on X-ray and Gamma-ray Counterparts of GW 151226

Abstract

We present upper limits in the hard X-ray and gamma-ray bands at the time of the LIGO gravitational-wave event GW 151226 derived from the CALorimetric Electron Telescope (CALET) observation. The main instrument of CALET, CALorimeter (CAL), observes gamma-rays from ~1 GeV up to 10 TeV with a field of view of ~2 sr. The CALET gamma-ray burst monitor (CGBM) views ~3 sr and ~2pi sr of the sky in the 7 keV - 1 MeV and the 40 keV - 20 MeV bands, respectively, by using two different scintillator-based instruments. The CGBM covered 32.5% and 49.1% of the GW 151226 sky localization probability in the 7 keV - 1 MeV and 40 keV - 20 MeV bands respectively. We place a 90% upper limit of 2 x 10^{-7} erg cm-2 s-1 in the 1 - 100 GeV band where CAL reaches 15% of the integrated LIGO probability (~1.1 sr). The CGBM 7 sigma upper limits are 1.0 x 10^{-6} erg cm-2 s-1 (7-500 keV) and 1.8 x 10^{-6} erg cm-2 s-1 (50-1000 keV) for one second exposure. Those upper limits correspond to the luminosity of 3-5 x 10^{49} erg s-1 which is significantly lower than typical short GRBs.

arXiv comment6 pages, 5 figures, accepted for publication in ApJL, corresponding authors: T. Sakamoto, S. Nakahira, Y. Asaoka

References in corpus (8)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
• Short-Duration Gamma-Ray Bursts
• Development of the Model of Galactic Interstellar Emission for Standard Point-Source Analysis of Fermi Large Area Telescope Data
• Localization and broadband follow-up of the gravitational-wave transient GW150914
• The First Fermi LAT Gamma-Ray Burst Catalog
• Short versus Long Gamma-Ray Bursts: spectra, energetics, and luminosities
• INTEGRAL upper limits on gamma-ray emission associated with the gravitational wave event GW150914

Cited by in corpus (11)

• Short GRBs at the dawn of the gravitational wave era
• Bimodal Long-Lasting Components in Short Gamma-Ray Bursts: Promising Electromagnetic Counterparts to Neutron Star Binary Mergers
• A Fermi Gamma-ray Burst Monitor Search for Electromagnetic Signals Coincident with Gravitational-Wave Candidates in Advanced LIGO's First Observing Run
• A tale of two transients: GW170104 and GRB170105A
• GW150914-like Black Holes as Galactic High-Energy Sources
• INTEGRAL IBIS, SPI, and JEM-X observations of LVT151012
• J-GEM Follow-Up Observations of The Gravitational Wave Source GW151226
• Search for GeV Gamma-ray Counterparts of Gravitational Wave Events by CALET
• The CALorimetric Electron Telescope (CALET) on the International Space Station: Results from the First Two Years On Orbit
• Short Gamma-Ray Bursts and Gravitational-Wave Observations from Eccentric Compact Binaries
• X-ray upper limits of GW151226 with MAXI