Search of the pair echo signatures in the high-energy light curve of GRB190114C

Abstract

A model of the time delayed electromagnetic cascade "echo" is applied to the bright gamma-ray burst GRB190114C - the first gamma-ray burst to be contemporaneously detected in high and very high energy gamma-ray bands. It is shown that the internal spread of the cascade in the absence of the intervening magnetic fields dilutes the "echo" emission over $10^3-10^5$ seconds depending on the energy. Accounting for the measured source flux in the $0.3-1$ TeV gamma-ray band, the prediction of the "echo" model is shown to match the detected lower-energy gamma-ray emission $10^4$ seconds after the burst. However, the "echo" emission remains indistinguishable from the intrinsic GRB190114C flux within the measurement uncertainties. Implications of this in the context of the intergalactic magnetic field measurement are discussed.

9 pages, 7 figures, accepted for publication to Physical Review D (https://link.aps.org/doi/10.1103/PhysRevD.107.043020)

References in corpus (15)

• MAGIC discovery of VHE Emission from the FSRQ PKS 1222+21
• Teraelectronvolt emission from the $\gamma$-ray burst GRB 190114C
• A very-high-energy component deep in the Gamma-ray Burst afterglow
• Observation of inverse Compton emission from a long $\gamma$-ray burst
• Black hole lightning due to particle acceleration at subhorizon scales
• Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow
• Search for Magnetically Broadened Cascade Emission From Blazars with VERITAS
• Probing the Nature of the Weakest Intergalactic Magnetic Fields with the High Energy Emission of Gamma-Ray Bursts
• The Effect of Nonlinear Landau Damping on Ultrarelativistic Beam Plasma Instabilities
• Detectability of Pair Echos from Gamma-Ray Bursts and Intergalactic Magnetic Fields
• Magnetogenesis around the first galaxies: the impact of different field seeding processes on galaxy formation
• Magnetization of the intergalactic medium in the IllustrisTNG simulations: the importance of extended, outflow-driven bubbles
• Revisit of non-linear Landau damping for electrostatic instability driven by blazar-induced pair beams
• Account of the baryonic feedback effect in gamma-ray measurements of intergalactic magnetic fields
• Can we constrain the extragalactic magnetic field from very high energy observations of GRB 190114C?

Cited by in corpus (4)

• Constraints on the intergalactic magnetic field strength from $\gamma$-ray observations of GRB 221009A
• Energetic particles and high-energy processes in cosmological filaments and their astronomical implications
• Constraints on the intergalactic magnetic field from Fermi-LAT observations of GRB 221009A
• Prospects for detection of the pair-echo emission from TeV gamma-ray bursts