GRB 110709B in the induced gravitational collapse paradigm

Context. It has been proposed that the temporal coincidence of a gamma-ray burst (GRB) and a type Ib/c supernova (SN) can be explained with the concept of induced gravitational collapse (IGC), induced by the matter ejected from an SN Ib/c accreting onto a neutron star (NS). The NS is expected to reach the critical mass necessary for it to collapse to a black hole (BH) and emit a GRB. We found a standard luminosity light curve behavior in the late-time X-ray emission of this subclass of GRBs. Aims. We test if this standard behavior in the luminosity found in this subclass of GRBs can become a redshift estimator of these sources. Methods. We selected a sample of GRBs that belong to this subclass of IGC GRBs associated to an SN (IGC GRB-SN sources). These sources have an isotropic energy E iso > 10 52 erg and their cosmological redshifts are in the range of z = 0.49−1.261. We focused on the corresponding X-ray luminosity light curves. Results. We find that all GRBs of the sample with measured redshift present a standard luminosity late-time light curve in the 0.3−10 keV rest-frame energy range. We used these results to estimate the GRB redshift of the sample without a measured redshift and found results consistent with other possible redshift indicators. Conclusions. The standard late-time X-ray luminosity light curve of all GRBs of the sample shows a common physical mechanism in this particular phase of the X-ray emission, possibly related to the creation of the NS from the SN process. This scaling law moreover represents strong evidence of very low or even absent beaming in this late phase of the X-ray afterglow emission process. This could be a fundamental tool for estimating the redshift of GRBs that belong to this subclass of events. We are currently expanding this subclass of GRBs to further verify the universal validity of this new redshift estimation method.

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“…The thermal emission changes in time following a precise power-law behavior (Izzo et al 2012b;Penacchioni et al 2012Penacchioni et al , 2013.…”

mentioning

confidence: 99%

Novel distance indicator for gamma-ray bursts associated with supernovae

Pisani

Izzo

Ruffini

et al. 2013

A&A

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“…These systems are characterized by four distinct episodes, each with specific signatures in its spectrum and luminosity evolution which, up to now, have been verified in several sources with cosmological redshift z 1 [4,5,6,7], and also in the farthest source, GRB 090423 at z = 8.2 [8].…”

Section: Introduction: Hypercrytical Accretion and Binary-driven Hypementioning

confidence: 70%

Hypercritical accretion, induced gravitational collapse and binary driven Hypernovae

Bayona¹,

Bianco²,

Enderli³

et al. 2015

Proceedings of Swift: 10 Years of Discovery — PoS(SWIFT 10)

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The induced gravitational collapse (IGC) paradigm has been successfully applied to the explanation of GRB-SNe. The progenitor is a tight binary system composed of a CO core and a NS companion. The explosion of the SN leads to hypercritical accretion onto the NS companion, which reaches the critical mass, gravitationally collapsing to a BH with consequent emission of the GRB. The first estimates of this process were based on a simplified model of the binary parameters and the Bondi-Hoyle-Lyttleton accretion rate. We present the first full numerical simulations of the IGC process. We simulate the core-collapse, the SN explosion, and the hydrodynamic evolution of the accreting material falling into the Bondi-Hoyle surface of the NS. For appropriate binary parameters, the IGC occurs in short timescale 10 2 -10 3 s due to the combined action of photon trapping and neutrino cooling near the NS surface. We address the observational features of this process. Swift: 10 Years

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“…1-2, and Pisani et al 2013;Ruffini et al 2014c). For this reason, this striking scaling law has been used as a distance indicator to independently estimate the cosmological redshift of some long GRBs by imposing the overlap of their LXRE (see, e.g., Penacchioni et al 2012Penacchioni et al , 2013Ruffini et al 2013bRuffini et al ,c, 2014a, and also to predict, ten days in advance, the observation of the typical optical signature of the supernova SN 2013cq, associated with GRB 130427A (Ruffini et al 2015(Ruffini et al , 2013ade Ugarte Postigo et al 2013;Levan et al 2013).…”

Section: Towards a First Catalog Of Binary-driven Hypernovaementioning

confidence: 99%

The first ICRANet catalog of binary-driven hypernovae

et al. 2018

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In a series of recent publications, scientists from ICRANet, led by professor Remo Ruffini, have reached a novel comprehensive picture of gamma-ray bursts (GRBs) thanks to their development of a series of new theoretical approaches. Among those, the induced gravitational collapse (IGC) paradigm explains a class of energetic, long-duration GRBs associated with Ib/c supernovae (SN), recently named binary-driven hypernovae (BdHNe). BdHNe have a well defined set of observational features which allow to identify them. Among them, the main two are: 1) long duration of the GRB explosion, namely larger than 2 s in the rest frame; 2) a total energy, released in all directions by the GRB explosion, larger than 10 52 ergs. A striking result is the observation, in the BdHNe sources, of a universal late time power-law decay in the X-rays luminosity after 10 4 s, with typical decaying slope of ∼ 1.5. This leads to the possible establishment of a new distance indicator having redshift up to z ∼ 8. Thanks to this novel theoretical and observational understanding, it was possible for ICRANet scientists to build the firstst BdHNe catalog, composed by the 345 BdHNe identified up to the end of 2016. Keywords: supernovae: general -binaries: general -gamma-ray burst: general -stars: neutron TOWARDS A FIRST CATALOG OF BINARY-DRIVEN HYPERNOVAEThe first observations by the BATSE instrument on board the Compton γ-ray Observatory satellite have evidenced what has later become known as the prompt radiation of GRBs. On the basis of their hardness as well as their duration, GRBs were initially classified into short and long in an epoch when their cosmological nature was still being debated (Mazets et al. 1981;Klebesadel 1992;Dezalay et al. 1992;Kouveliotou et al. 1993;Tavani 1998).The advent of the BeppoSAX satellite (Boella et al. 1997) introduced a new approach to GRBs by introducing joint observations in the X-rays and γ-rays thanks to its instruments: the Gamma-ray Burst Monitor (40-700 keV), the Wide Field Cameras (2-26 keV), and the Narrow Field Instruments (2-10 keV). The unexpected discovery of a well separate component in the GRB soon appeared: the afterglow, namely a radiation lasting up to 10 5 -10 6 s after the emission of the prompt radiation (see Costa et al. 1997a,b;Frontera et al. 1998Frontera et al. , 2000de Pasquale et al. 2006). Beppo-SAX clearly indicated the existence of a power law behavior in the late X-ray emission (LXRE).The coming of the Swift satellite (Gehrels et al. 2004;Evans et al. 2007Evans et al. , 2010, significantly extending the ob- servation energy band to the X-ray band thanks to its X-ray Telescope (XRT band: 0.3-10 keV), has allowed us for the first time to uncover the unexplored region between the end of the prompt radiation and the power-law late X-ray behavior discovered by BeppoSAX : in some long GRBs, a steep decay phase was observed leading to a plateau followed then by a typical LXRE power law behavior (Evans et al. 2007(Evans et al. , 2010.Recently, Pisani et al. (2013) noticed the unex...

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GRB 110709B in the induced gravitational collapse paradigm

Cited by 31 publications

References 43 publications

Novel distance indicator for gamma-ray bursts associated with supernovae

Novel distance indicator for gamma-ray bursts associated with supernovae

Hypercritical accretion, induced gravitational collapse and binary driven Hypernovae

The first ICRANet catalog of binary-driven hypernovae

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