Time-integrated polarizations in GRB prompt phase via the Multi-window interpretation

Abstract

The multi-window observations, including the light curve and the evolutions of the spectral peak energy ($E_p$), the polarization degree (PD) and the polarization angle (PA), are used to infer the model parameters to predict the time-integrated PD in gamma-ray burst (GRB) prompt phase. We select 23 GRBs co-detected by Fermi/GBM and polarization detectors (i.e., GAP, POLAR and AstroSat). In our multi-window fitting, the light curve, $E_p$ curve, PD curve and PA curve are interpreted simultaneously under the synchrotron radiation model in ordered magnetic fields (i.e., the aligned-fields case and the toroidal-fields case). For the bursts with abrupt PA rotations, the predicted time-integrated PD of the aligned-fields case roughly matches the corresponding observed best fit value, while it is higher for the toroidal-fields case. For the bursts without abrupt PA rotation(s), the predicted PDs of the aligned-fields case and the toroidal-fields case are comparable and could interpret the observational data equally well. For GRB 170206A, its observed time-resolved and time-integrated PDs are comparable and both smaller than our predicted upper limits in ordered magnetic fields. So mixed magnetic fields, i.e., the magnetic fields with both ordered and random components, should be reside in the radiation regions of this burst. Except 1 out of the total 23 bursts, the predicted time-integrated PDs, which are around $\sim 44\%$ for the aligned-fields case and around $49\%$ for the toroidal-fields case, are consistent with the corresponding observed values. Therefore, consistent with the former study, the models with synchrotron radiation in ordered magnetic fields could interpret most of the current polrization data within $1\sigma$ error bar.

19 pages, 26 figures, 2 tables

References in corpus (36)

• The Internal-Collision-Induced Magnetic Reconnection and Turbulence (ICMART) Model of Gamma-Ray Bursts
• Steep Slopes and Preferred Breaks in GRB Spectra: the Role of Photospheres and Comptonization
• The Complete Spectral Catalog of Bright BATSE Gamma-Ray Bursts
• The Fourth Fermi-GBM Gamma-Ray Burst Catalog: A Decade of Data
• Large scale magnetic fields and their dissipation in GRB fireballs
• Acceleration of GRB outflows by Poynting flux dissipation
• Prompt GRB emission from gradual energy dissipation
• Detection of Gamma-Ray Polarization in Prompt Emission of GRB 100826A
• Statistical Properties of Gamma-Ray Burst Polarization
• The polarisation of afterglow emission reveals GRB jet structure
• A Comprehensive Analysis of Fermi Gamma-ray Burst Data: II. $E_{\mathrm{p}}$-Evolution Patterns and Implications for the Observed Spectrum-Luminosity Relations
• The Most Probable Cause for the High Gamma-Ray Polarization in GRB 021206
• Magnetic Structures in Gamma-Ray Burst Jets Probed by Gamma-Ray Polarization
• New direction for gamma-rays
• A Compact Fireball Model of Gamma Ray Bursts
• Detailed polarization measurements of the prompt emission of five Gamma-Ray Bursts
• The POLAR Gamma-Ray Burst Polarization Catalog
• Polarization in the prompt emission of gamma-ray bursts and their afterglows
• On the Cosmological Evolution of Long Gamma-ray Burst Properties
• Constraining the magnetic field structure in collisionless relativistic shocks with a radio afterglow polarization upper limit in GW170817
• Gamma-Ray Burst Polarimeter - GAP - aboard the Small Solar Power Sail Demonstrator IKAROS
• Time-Resolved GRB Polarization with POLAR and GBM
• Design and construction of the POLAR detector
• Time varying polarized gamma-rays from GRB 160821A: evidence for ordered magnetic fields
• Toward an understanding of GRB prompt emission mechanism: II. Patterns of peak energy evolution and their connection to spectral lags
• The $E_{\mathrm{p}}$-Flux Correlation in the Rising and Decaying Phases of Gamma-Ray Burst Pulses: Evidence for Viewing Angle Effect?
• Hard X-ray polarization catalog for a 5-year sample of Gamma-Ray Bursts using AstroSat CZT-Imager
• Time-Resolved and Energy-Resolved Polarizations of GRB Prompt Emission
• A comprehensive analysis of Fermi Gamma-Ray Burst Data: IV. Spectral lag and Its Relation to Ep Evolution
• Polarization with a 3-dimensional Mixed Magnetic Field and Its Application to GRB 170817A
• Photospheric Polarization Signatures From Long Gamma Ray Burst Simulations
• Gamma-Ray Burst Optical Afterglows with Two-Component Jets: Polarization Evolution Revisited
• Photospheric Prompt Emission From Long Gamma Ray Burst Simulations -- II. Spectropolarimetry
• Polarization Predictions in the GRB Prompt Phase with the Internal Shock Model
• Interpreting time-integrated polarization data of gamma-ray burst prompt emission
• The polarization-angle flip in GRB prompt emission