CGRO/BATSE Data Support the New Paradigm for GRB Prompt Emission and the New L${}_i^{nTh}$-E${}_{peak,i}^{nTh,rest}$ relation

Abstract

The paradigm for GRB prompt emission is changing. Since early in the CGRO era, the empirical Band function has been considered a good description of the keV-MeV spectra although its shape is very often inconsistent with the predictions of the pure synchrotron emission scenarios. We have recently established a new observational model analyzing data of the NASA Fermi Gamma-ray Space Telescope. In this model, GRB prompt emission is a combination of three main emission components: (i) a thermal-like component that we interpreted so far as the jet photosphere emission, (ii) a non-thermal component that we interpreted so far as synchrotron radiation, and (iii) an additional non-thermal (cutoff) power-law most likely of inverse Compton origin. In this article we reanalyze some of the bright GRBs observed with CGRO/BATSE with the new model, namely GRBs 941017, 970111 and 990123. We conclude that BATSE data are fully consistent with the recent results obtained with Fermi: some bright BATSE GRBs exhibit three separate components during the prompt phase with similar spectral parameters as these reported from Fermi data. In addition, the analysis of the BATSE GRBs with the new model results in a relation between the time-resolved energy flux of the non-thermal component and its corresponding $\nu$F${}_{\nu }$ peak energy (i.e., F${}_i^{nTh}$-E${}_{peak,i}^{nTh}$) that has a similar index as the one initially derived from Fermi data. For GRBs with known redshift (z) this results in a possible universal relation between the luminosity of the non-thermal component and its corresponding $\nu$F${}_{\nu }$ peak energy in the rest frame (i.e., L${}_i^{nTh}$-E${}_{peak,i}^{NT,rest}$). We estimated z for GRBs 941017 and 970111 using GRB 990123--with z=1.61--as a reference. The estimated z for GRB 941017 is typical for long GRBs and the estimated z for GRB 970111 is right in the range of the expected values for this burst.

15 pages of article (14 figures and 3 tables) + 17 pages of Appendix (6 figures and 3 tables), Submitted to ApJ (Received June 18, 2015)

References in corpus (9)

• Detection of a Thermal Spectral Component in the Prompt Emission of GRB 100724B
• GRB110721A: An extreme peak energy and signatures of the photosphere
• Temporal Evolution Of Thermal Emission From Relativistically Expanding Plasma
• A Comprehensive Analysis of Fermi Gamma-ray Burst Data: II. $E_{\mathrm{p}}$-Evolution Patterns and Implications for the Observed Spectrum-Luminosity Relations
• Physics of Gamma-Ray Bursts Prompt Emission
• The optically unbiased GRB host (TOUGH) survey. III. Redshift distribution
• Towards a Better Understanding of the GRB Phenomenon: a New Model for GRB Prompt Emission and its effects on the New Non-Thermal L${}_{\mathrm{i}}^{\mathrm{NT}}$-E${}_{\mathrm{peak},\mathrm{i}}^{\mathrm{rest},\mathrm{NT}}$ relation
• Time-Resolved Spectroscopy of the 3 Brightest and Hardest Short Gamma-Ray Bursts Observed with the FGST Gamma-Ray Burst Monitor
• GRB 131014A: a Laboratory to Study the Thermal-Like and Non-Thermal Emissions in Gamma-Ray Bursts, and the new L${}_{\mathrm{i}}^{\mathrm{nTh}}$-E${}_{\mathrm{peak},\mathrm{i}}^{\mathrm{nTh},\mathrm{rest}}$ relation

Cited by in corpus (14)

• Detection of Low-energy Breaks in Gamma-Ray Burst Prompt Emission Spectra
• Gamma-ray burst prompt correlations: selection and instrumental effects
• Spectral analysis of Fermi-LAT gamma-ray bursts with known redshift and their potential use as cosmological standard candles
• Gamma Ray Burst Prompt correlations
• Bayesian Time-Resolved Spectroscopy of GRB Pulses
• A New Measurement of the Spectral Lag of Gamma-Ray Bursts and its Implications for Spectral Evolution Behaviors
• A Unified Model for GRB Prompt Emission from Optical to $\gamma$-Rays: Exploring GRBs as Standard Candles
• Violation of synchrotron line of death by the highly polarized $GRB160802A$
• GRB Spectrum from Gradual Dissipation in a Magnetized Outflow
• Photospheric Emission in the Joint GBM and Konus Prompt Spectra of GRB 120323A
• GRB Redshift Estimation using Machine Learning and the Associated Web-App
• Evolutions and Calibrations of Long Gamma-Ray Bursts Luminosity Correlations Revisited
• Multiple Components in the Broadband $\gamma$-ray Emission of the Short GRB 160709A
• Broad-band Spectral Modeling of Prompt Emission from Gamma-Ray Bursts Observed by the Transiting Exoplanet Survey Satellite