D. Guetta
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View article: On the Light Curves of Disk and Bulge Novae
On the Light Curves of Disk and Bulge Novae Open
We examine the light curves of a sample of novae, classifying them into single-peaked and multiple-peaked morphologies. Using accurate distances from Gaia, we determine the spatial distribution of these novae by computing their heights, Z …
View article: On the light-curves of disk and bulge novae
On the light-curves of disk and bulge novae Open
We examine the light curves of a sample of novae, classifying them into single-peaked and multiple-peaked morphologies. Using accurate distances from Gaia, we determine the spatial distribution of these novae by computing their heights, $Z…
View article: Redshift leverage for the search of GRB neutrinos affected by quantum properties of spacetime
Redshift leverage for the search of GRB neutrinos affected by quantum properties of spacetime Open
Some previous studies based on IceCube neutrinos had found intriguing preliminary evidence that some of them might be GRB neutrinos with travel times affected by quantum properties of spacetime delaying them proportionally to their energy,…
View article: Multi-messenger emission from astrophysical sources hidden in γ-rays
Multi-messenger emission from astrophysical sources hidden in γ-rays Open
Over the last decade, choked jets have attracted particular attention as potential sources of high-energy cosmic neutrinos. Testing this hypothesis is challenging because of the missing gamma-ray counterpart; hence the identification of ot…
View article: Towards multi-messenger observations of core-collapse supernovae harbouring choked jets
Towards multi-messenger observations of core-collapse supernovae harbouring choked jets Open
Context. Over the past decade, choked jets have attracted particular attention as potential sources of high-energy cosmic neutrinos. It is challenging to test this hypothesis because of the missing gamma-ray counterpart. An identification …
View article: Neutrino Fluxes from Different Classes of Galactic Sources
Neutrino Fluxes from Different Classes of Galactic Sources Open
We estimate the neutrino flux from different kinds of galactic sources and compare it with the recent diffuse neutrino flux detected by IceCube. We find that the flux from these sources may contribute to ∼20% of the IceCube neutrino flux. …
View article: High-energy neutrinos from the vicinity of the supermassive black hole in NGC 1068
High-energy neutrinos from the vicinity of the supermassive black hole in NGC 1068 Open
We present a comprehensive multi-messenger study of NGC 1068, the prototype Seyfert II galaxy recently associated with high-energy IceCube neutrinos. Various aspects of the source, including its nuclear activity, jet, outflow, and starburs…
View article: Towards multi-messenger observations of core-collapse supernovae harbouring choked jets
Towards multi-messenger observations of core-collapse supernovae harbouring choked jets Open
Choked jets (CJ) have attracted particular attention as potential sources of high-energy cosmic neutrinos. Testing this hypothesis is challenging because of the missing gamma-ray counterpart, hence the identification of other electromagnet…
View article: Neutrino fluxes from different classes of galactic sources
Neutrino fluxes from different classes of galactic sources Open
We estimate the neutrino flux from different kinds of galactic sources and compare it with the recently diffuse neutrino flux detected by IceCube. We find that the flux from these sources may contribute to ~ 20% of the IceCube neutrino flu…
View article: ULTRASAT: A Wide-field Time-domain UV Space Telescope
ULTRASAT: A Wide-field Time-domain UV Space Telescope Open
The Ultraviolet Transient Astronomy Satellite (ULTRASAT) is scheduled to be launched to geostationary orbit in 2027. It will carry a telescope with an unprecedentedly large field of view (204 deg 2 ) and near-ultraviolet (NUV; 230–290 nm) …
View article: On the hadronic origin of the TeV radiation from GRB 190114C
On the hadronic origin of the TeV radiation from GRB 190114C Open
The recently discovered TeV emission from Gamma-Ray Bursts (GRBs) has renewed the long-standing discussion about the hadronic versus leptonic origin of the observed GRB radiation. In this work, we investigate the possibility that the very …
View article: White Paper and Roadmap for Quantum Gravity Phenomenology in the Multi-Messenger Era
White Paper and Roadmap for Quantum Gravity Phenomenology in the Multi-Messenger Era Open
The unification of quantum mechanics and general relativity has long been elusive. Only recently have empirical predictions of various possible theories of quantum gravity been put to test, where a clear signal of quantum properties of gra…
View article: Low- and High-energy Neutrinos from SN 2023ixf in M101
Low- and High-energy Neutrinos from SN 2023ixf in M101 Open
Supernova (SN) 2023ixf in M101 is the closest SN explosion observed in the last decade. Therefore, it is a suitable test bed to study the role of jets in powering the SN ejecta. With this aim, we explored the idea that high-energy neutrino…
View article: UV Signatures of Magnetar Formation and Their Crucial Role for GW Detection
UV Signatures of Magnetar Formation and Their Crucial Role for GW Detection Open
The emission from shock breakouts (SBOs) represents the earliest electromagnetic (EM) signal emitted by cataclysmic events involving the formation or the merger of neutron stars (NSs). As such, SBOs carry unique information on the structur…
View article: Understanding the nature of the optical emission in gamma-ray bursts: analysis from TAROT, COATLI, and RATIR observations
Understanding the nature of the optical emission in gamma-ray bursts: analysis from TAROT, COATLI, and RATIR observations Open
We collected the optical light-curve data of 227 gamma-ray bursts (GRBs) observed with the TAROT, COATLI, and RATIR telescopes. These consist of 133 detections and 94 upper limits. We constructed average light curves in the observer and re…
View article: Understanding the Nature of the Optical Emission in Gamma-Ray Bursts: Analysis from TAROT, COATLI, and RATIR Observations
Understanding the Nature of the Optical Emission in Gamma-Ray Bursts: Analysis from TAROT, COATLI, and RATIR Observations Open
We collected the optical light curve data of 227 gamma-ray bursts (GRBs) observed with the TAROT, COATLI, and RATIR telescopes. These consist of 133 detections and 94 upper limits. We constructed average light curves in the observer and re…
View article: Low and High Energy Neutrinos from SN 2023ixf in M101
Low and High Energy Neutrinos from SN 2023ixf in M101 Open
Supernova (SN) 2023ixf in M101 is the closest SN explosion observed in the last decade. Therefore it is a suitable test bed to study the role of jets in powering the SN ejecta. With this aim, we explored the idea that high-energy neutrinos…
View article: UV signatures of magnetar formation and their crucial role for Gravitational Wave detection
UV signatures of magnetar formation and their crucial role for Gravitational Wave detection Open
The emission from shock breakouts (SBOs) represents the earliest electromagnetic (EM) signal emitted by cataclysmic events involving the formation or the merger of neutron stars (NSs). As such, SBOs carry unique information on the structur…
View article: ULTRASAT: A wide-field time-domain UV space telescope
ULTRASAT: A wide-field time-domain UV space telescope Open
The Ultraviolet Transient Astronomy Satellite (ULTRASAT) is scheduled to be launched to geostationary orbit in 2026. It will carry a telescope with an unprecedentedly large field of view (204 deg$^2$) and NUV (230-290nm) sensitivity (22.5 …
View article: Nova neutrinos in the multi-messenger era
Nova neutrinos in the multi-messenger era Open
The recently discovered high energy emission from the recurrent nova RS Ophiuchi by Fermi-LAT (> 100 MeV), H.E.S.S. and MAGIC (>100 GeV), hints towards a possible hadronic origin of this radiation component. From the observed high energy p…
View article: Neutrino predictions from choked Gamma-Ray Bursts and comparison with the observed cosmic diffuse neutrino flux
Neutrino predictions from choked Gamma-Ray Bursts and comparison with the observed cosmic diffuse neutrino flux Open
The strong constraints from the Fermi-LAT data on the isotropic gamma-ray background suggest that the neutrinos observed by IceCube might possibly come from sources that are hidden to gamma-ray observations. A possibility emerged in recent…
View article: TeV emission from Gamma Ray Bursts, checking the hadronic model
TeV emission from Gamma Ray Bursts, checking the hadronic model Open
Gamma-Ray Bursts (GRBs) are the most luminous explosions in the Universe. Their luminous prompt emission makes them detectable from cosmological distances. Most GRBs have been detected below a few MeV, however at least a hundred GRBs have …
View article: Nova Neutrinos in the Multi-Messenger Era
Nova Neutrinos in the Multi-Messenger Era Open
The recently discovered high energy emission from the recurrent nova RS Ophiuchi by Fermi-LAT ($>$ 100 MeV), H.E.S.S. and MAGIC ($>$ 100 GeV), hints towards a possible hadronic origin of this radiation component. From the observed high ene…
View article: On the hadronic origin of the TeV radiation from GRB 190114C
On the hadronic origin of the TeV radiation from GRB 190114C Open
The recently discovered TeV emission from Gamma-Ray Bursts (GRBs) hints towards a possible hadronic origin of this radiation component. We developed a Monte Carlo (MC) simulation reproducing the kinematics of photo-hadronic interactions at…
View article: GeV Signatures of Short Gamma-Ray Bursts in Active Galactic Nuclei
GeV Signatures of Short Gamma-Ray Bursts in Active Galactic Nuclei Open
The joint detection of gravitational waves and the gamma-ray counterpart of a binary neutron star merger event, GW170817, unambiguously validates the connection between short gamma-ray bursts and compact binary object (CBO) mergers. We foc…
View article: Luminosity selection for gamma-ray bursts
Luminosity selection for gamma-ray bursts Open
Aims. There exists inevitable scatter in the intrinsic luminosity of gamma-ray bursts (GRBs). If there is relativistic beaming in the source, viewing angle variation necessarily introduces variation in the intrinsic luminosity function (IL…
View article: Luminosity Selection for Gamma Ray Burst
Luminosity Selection for Gamma Ray Burst Open
There exists an inevitable scatter in intrinsic luminosity of Gamma Ray\nBursts(GRBs). If there is relativistic beaming in the source, viewing angle\nvariation necessarily introduces variation in the intrinsic luminosity function\n(ILF). S…
View article: Luminosity Selection for Gamma Ray Burst
Luminosity Selection for Gamma Ray Burst Open
There exists an inevitable scatter in intrinsic luminosity of Gamma Ray Bursts(GRBs). If there is relativistic beaming in the source, viewing angle variation necessarily introduces variation in the intrinsic luminosity function (ILF). Scat…