Gravitational-Wave Observations May Constrain Gamma-Ray Burst Models: The Case of Gw150914–gbm

Vereš, P.; Preece, R.; Goldstein, A.; Mészáros, P.; Burns, E.; Connaughton, V.

doi:10.3847/2041-8205/827/2/l34

Cited by 15 publications

(17 citation statements)

References 60 publications

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“…Lyutikov (2016) has argued that the physical properties necessary to create GW150914-GBM are highly implausible, although Khan et al (2018) surveyed different models of disks around merging BBHs using magnetohydrodynamic simulations and shows that such systems could produce an EM counterpart consistent with the properties of GW150914-GBM. Likewise Veres et al (2016) showed that dissipative photosphere models of GRB emission can accommodate the GBM observations. Ultimately, the detection of another EM signal from a BBH system will be required to conclusively settle the debate as to the origin of GW150914-GBM.…”

Section: Discussionmentioning

confidence: 94%

Analysis of Sub-threshold Short Gamma-Ray Bursts in Fermi GBM Data

Kocevski

Burns

Goldstein

et al. 2018

ApJ

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The Fermi Gamma-ray Burst Monitor (GBM) is currently the most prolific detector of gamma-ray bursts (GRBs). Recently the detection rate of short GRBs (SGRBs) has been dramatically increased through the use of groundbased searches that analyze GBM continuous time-tagged event (CTTE) data. Here, we examine the efficiency of a method developed to search CTTE data for sub-threshold transient events in temporal coincidence with LIGO/ Virgo compact binary coalescence triggers. This targeted search operates by coherently combining data from all 14 GBM detectors by taking into account the complex spatial and energy dependent response of each detector. We use the method to examine a sample of SGRBs that were independently detected by the Burst Alert Telescope on board the Neil Gehrels Swift Observatory, but which were too intrinsically weak or viewed with unfavorable instrument geometry to initiate an onboard trigger of GBM. We find that the search can successfully recover a majority of the BAT detected sample in the CTTE data. We show that the targeted search of CTTE data will be crucial in increasing the GBM sensitivity, and hence the gamma-ray horizon, to weak events such as GRB 170817A. We also examine the properties of the GBM signal possibly associated with the LIGO detection of GW150914 and show that it is consistent with the observed properties of other sub-threshold SGRBs in our sample. We find that the targeted search is capable of recovering true astrophysical signals as weak as the signal associated with GW150914 in the untriggered data.

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Section: Discussionmentioning

confidence: 94%

Analysis of Sub-threshold Short Gamma-Ray Bursts in Fermi GBM Data

Kocevski

Burns

Goldstein

et al. 2018

ApJ

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“…In light of a new study by Veres et al (2016), where a CPL was fit to the 14 detector GBM data to understand the plausible physical GRB scenarios that could explain the signal, we reexamine the spectral models of the GBM event. The authors use a method, which is not described, to incorporate multiple locations along the LIGO arc and Monte Carlo the maximum likelihood profile of the parameters.…”

Section: Comment On the Case Of Gw150914-gbm Eventmentioning

confidence: 99%

Awakening the BALROG: BAyesian Location Reconstruction Of GRBs

Burgess

Greiner

et al. 2017

Monthly Notices of the Royal Astronomical Society

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The accurate spatial location of gamma-ray bursts (GRBs) is crucial for both characterizing their spectra and follow-up observations by other instruments. The Fermi Gamma-ray Burst Monitor (GBM) has the largest field of view (FOV) for detecting GRBs as it views the entire unocculted sky, but as a non-imaging instrument, it relies on the relative count rates observed in each of its 14 detectors to localize transients. Improving its ability to locate GRBs and other transients is vital to the paradigm of multi-messenger astronomy, including the electromagnetic follow-up of gravitational wave signals. We present the BAyesian Location Reconstruction Of GRBs (BALROG) method for localizing GBM transients. Our approach eliminates the systematics of previous approaches by simultaneously fitting for the location and spectrum of a source. It also correctly incorporates the uncertainties in the location of a transient into the spectral parameters and produces reliable positional uncertainties for well-localized sources and those for which the GBM data cannot effectively constrain the position. BALROG can be implemented to enable quick follow-up of all GBM transients. Also, we identify possible response problems that require attention as well as caution when using standard, public GBM DRMs. We examine the effects of including the uncertainty in location on the spectral parameters of GRB 080916C. We find that spectral parameters change and no extra components are required when these effects are included. This finding has the potential to alter both the GRB spectral catalogs as well as the reported spectral composition of some well-known GRBs.

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“…According to Perna et al (2016), an sGRB might result from the BBH merger triggering the accretion of a disk around one of the BHs in the final seconds before the coalescence, but Kimura et al (2017) find it is difficult to have the disk survive down to seconds before the coalescence as required. An efficient way to power EM emission is the Blandford-Znajek (Blandford & Znajek 1977) process of electromagnetic extraction of mechanical energy (Li et al 2016;Veres et al 2016). Lyutikov (2016), however, pointed out that the EM luminosity associated with GW150914 would require magnetic fields of ∼10 12 G, astrophysically implausible for an environment around a BH.…”

Section: Discussionmentioning

confidence: 99%

Fermi Observations of the LIGO Event GW170104

Goldstein¹,

Vereš²,

Burns³

et al. 2017

ApJL

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We present the Fermi Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) observations of the LIGO binary black hole merger (BBH) event GW170104. No candidate electromagnetic counterpart was detected by either GBM or LAT. A detailed analysis of the GBM and LAT data over timescales from seconds to days covering the Laser Interferometer Gravitational-wave Observatory (LIGO) localization region is presented. The resulting flux upper bound from the GBM is (5.2-9.4)×10 −7 erg cm −2 s −1 in the 10-1000 keV range and from the LAT is (0.2-90)×10 −9 erg cm −2 s −1 in the 0.1-1 GeV range. We also describe the improvements to our automated pipelines and analysis techniques for searching for and characterizing the potential electromagnetic counterparts for future gravitational-wave events from Advanced LIGO/Virgo.

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Gravitational-Wave Observations May Constrain Gamma-Ray Burst Models: The Case of Gw150914–gbm

Cited by 15 publications

References 60 publications

Analysis of Sub-threshold Short Gamma-Ray Bursts in Fermi GBM Data

Analysis of Sub-threshold Short Gamma-Ray Bursts in Fermi GBM Data

Awakening the BALROG: BAyesian Location Reconstruction Of GRBs

Fermi Observations of the LIGO Event GW170104

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