E. Palazzi
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View article: Euclid Quick Data Release (Q1). Characteristics and limitations of the spectroscopic measurements
Euclid Quick Data Release (Q1). Characteristics and limitations of the spectroscopic measurements Open
The spectroscopy processing function (SPE PF) of the Euclid pipeline is dedicated to the automatic analysis of 1D spectra to determine redshifts, line fluxes, and spectral classifications. The first Euclid Quick Data Release (Q1) delivers …
View article: The brightest GRB ever detected: GRB 221009A as a highly luminous event at <i>z</i> = 0.151
The brightest GRB ever detected: GRB 221009A as a highly luminous event at <i>z</i> = 0.151 Open
Context. The extreme luminosity of gamma-ray bursts (GRBs) makes them powerful beacons, thus effective probes of the distant Universe. The most luminous bursts are typically detected at moderate and high redshift, where the volume for seei…
View article: The Puzzling Long GRB 191019A: Evidence for Kilonova Light
The Puzzling Long GRB 191019A: Evidence for Kilonova Light Open
GRB 191019A was a long gamma-ray burst (GRB) lasting ~65 s and, as such, originally thought to be linked to a core-collapse supernova. However, even though follow-up observations identified the optical counterpart close to the bright nucle…
View article: The puzzling long GRB 191019A: Evidence for Kilonova Light
The puzzling long GRB 191019A: Evidence for Kilonova Light Open
GRB 191019A was a long Gamma-ray burst (GRB) lasting about 65 s and, as such, originally thought to be linked to a core-collapse supernova. However, even though follow-up observations identified the optical counterpart close to the bright …
View article: Discovery of a PRS associated with FRB 20240114A
Discovery of a PRS associated with FRB 20240114A Open
We present the discovery of the fourth persistent radio source (PRS) associated with a fast radio burst (FRB). Following previous indications of a candidate PRS associated with FRB20240114A, we performed deep VLBA observations at 5 GHz to …
View article: The supernova detection of the shortest collapsar event GRB 200826A
The supernova detection of the shortest collapsar event GRB 200826A Open
Observational and theoretical evidence have identified two different origin for the gamma-ray bursts (GRBs): the death of very massive stars or the merger of compact objects. The evidence for massive star explosions is indicated by the obs…
View article: Correction to: Comparing emission- and absorption-based gas-phase metallicities in GRB host galaxies at <i>z</i> = 2−4 using JWST
Correction to: Comparing emission- and absorption-based gas-phase metallicities in GRB host galaxies at <i>z</i> = 2−4 using JWST Open
\n Contains fulltext :\n 306781.pdf (Publisher’s version ) (Open Access)\n
View article: Comparing emission- and absorption-based gas-phase metallicities in GRB host galaxies at <i>z</i> = 2−4 using JWST
Comparing emission- and absorption-based gas-phase metallicities in GRB host galaxies at <i>z</i> = 2−4 using JWST Open
Much of what is known of the chemical composition of the universe is based on emission line spectra from star-forming galaxies. Emission-based inferences are, nevertheless, model-dependent and they are dominated by light from luminous star…
View article: <i>Euclid</i>preparation
<i>Euclid</i>preparation Open
The statistical distribution and evolution of key properties of active galactic nuclei (AGN), such as their accretion rate, mass, and spin, remains a subject of open debate in astrophysics. The ESA Euclid space mission, launched on July 1 …
View article: GRB 201015A: from seconds to months of optical monitoring and supernova discovery
GRB 201015A: from seconds to months of optical monitoring and supernova discovery Open
We present full photometric coverage and spectroscopic data for soft gamma-ray burst GRB 201015A with a redshift z = 0.426. Our data span a time range of 85 d following the detection of GRB. These observations revealed an underlying supern…
View article: A nebular origin for the persistent radio emission of fast radio bursts
A nebular origin for the persistent radio emission of fast radio bursts Open
Fast radio bursts (FRBs) are millisecond-duration, bright ($\sim$Jy) extragalactic bursts, whose production mechanism is still unclear. Recently, two repeating FRBs were found to have a physically associated persistent radio source of non-…
View article: 1100 days in the life of the supernova 2018ibb
1100 days in the life of the supernova 2018ibb Open
Stars with zero-age main sequence masses between 140 and 260 M ⊙ are thought to explode as pair-instability supernovae (PISNe). During their thermonuclear runaway, PISNe can produce up to several tens of solar masses of radioactive nickel,…
View article: Euclid preparation. Spectroscopy of active galactic nuclei with NISP
Euclid preparation. Spectroscopy of active galactic nuclei with NISP Open
The statistical distribution and evolution of key properties (e.g. accretion rate, mass, or spin) of active galactic nuclei (AGN), remain an open debate in astrophysics. The ESA Euclid space mission, launched on July 1st 2023, promises a b…
View article: Comparing emission- and absorption-based gas-phase metallicities in GRB host galaxies at $z=2-4$ using JWST
Comparing emission- and absorption-based gas-phase metallicities in GRB host galaxies at $z=2-4$ using JWST Open
Much of what is known of the chemical composition of the universe is based on emission line spectra from star forming galaxies. Emission-based inferences are, nevertheless, model-dependent and they are dominated by light from luminous star…
View article: The cosmic buildup of dust and metals
The cosmic buildup of dust and metals Open
The chemical enrichment of dust and metals in the interstellar medium of galaxies throughout cosmic time is one of the key driving processes of galaxy evolution. Here we study the evolution of the gas-phase metallicities, dust-to-gas (DTG)…
View article: The cosmic build-up of dust and metals. Accurate abundances from GRB-selected star-forming galaxies at $1.7 < z < 6.3$
The cosmic build-up of dust and metals. Accurate abundances from GRB-selected star-forming galaxies at $1.7 < z < 6.3$ Open
The chemical enrichment of dust and metals in the interstellar medium (ISM) of galaxies throughout cosmic time is one of the key driving processes of galaxy evolution. Here we study the evolution of the gas-phase metallicities, dust-to-gas…
View article: Simultaneous and panchromatic observations of the fast radio burst FRB 20180916B
Simultaneous and panchromatic observations of the fast radio burst FRB 20180916B Open
Aims. Fast radio bursts are bright radio transients whose origins are not yet understood. The search for a multi-wavelength counterpart of those events can set a tight constraint on the emission mechanism and the progenitor source. Methods…
View article: Simultaneous and panchromatic observations of the Fast Radio Burst FRB 20180916B
Simultaneous and panchromatic observations of the Fast Radio Burst FRB 20180916B Open
Aims. Fast Radio Bursts are bright radio transients whose origin has not yet explained. The search for a multi-wavelength counterpart of those events can put a tight constrain on the emission mechanism and the progenitor source. Methods. W…
View article: 1100 days in the life of the supernova 2018ibb -- The best pair-instability supernova candidate, to date
1100 days in the life of the supernova 2018ibb -- The best pair-instability supernova candidate, to date Open
Abridged - Stars with ZAMS masses between 140 and $260 M_\odot$ are thought to explode as pair-instability supernovae (PISNe). During their thermonuclear runaway, PISNe can produce up to several tens of solar masses of radioactive nickel, …
View article: The brightest GRB ever detected: GRB 221009A as a highly luminous event at z = 0.151
The brightest GRB ever detected: GRB 221009A as a highly luminous event at z = 0.151 Open
Context: The extreme luminosity of gamma-ray bursts (GRBs) makes them powerful beacons for studies of the distant Universe. The most luminous bursts are typically detected at moderate/high redshift, where the volume for seeing such rare ev…
View article: Update of the INTEGRAL/IBIS active galactic nuclei catalogue: Deeper on the Galactic plane and wider beyond
Update of the INTEGRAL/IBIS active galactic nuclei catalogue: Deeper on the Galactic plane and wider beyond Open
In this work we have updated the list of active galactic nuclei (AGN) detected by INTEGRAL taking into account the new objects listed in the last published INTEGRAL/IBIS survey. We have collected 83 new AGN, increasing the number of INTEGR…
View article: Update of the INTEGRAL/IBIS AGN catalogue: deeper on the Galactic plane and wider beyond
Update of the INTEGRAL/IBIS AGN catalogue: deeper on the Galactic plane and wider beyond Open
In this work we have updated the list of AGN detected by INTEGRAL taking into account the new objects listed in the last published INTEGRAL/IBIS survey. We have collected 83 new AGN increasing the number of INTEGRAL detected active galaxie…
View article: Dissecting the interstellar medium of a<i>z</i>= 6.3 galaxy
Dissecting the interstellar medium of a<i>z</i>= 6.3 galaxy Open
The study of the properties of galaxies in the first billion years after the Big Bang is one of the major topics of current astrophysics. Optical and near-infrared spectroscopy of the afterglows of long gamma-ray bursts (GRBs) provides a p…
View article: A blast from the infant Universe: The very high-<i>z</i>GRB 210905A
A blast from the infant Universe: The very high-<i>z</i>GRB 210905A Open
We present a detailed follow-up of the very energetic GRB 210905A at a high redshift of z = 6.312 and its luminous X-ray and optical afterglow. Following the detection by Swift and Konus- Wind , we obtained a photometric and spectroscopic …
View article: The Peculiar Short-duration GRB 200826A and Its Supernova*
The Peculiar Short-duration GRB 200826A and Its Supernova* Open
Gamma-ray bursts (GRBs) are classified into long and short events. Long GRBs (LGRBs) are associated with the end states of very massive stars, while short GRBs (SGRBs) are linked to the merger of compact objects. GRB 200826A was a peculiar…
View article: The Interstellar Medium in the Environment of the Supernova-less Long-duration GRB 111005A
The Interstellar Medium in the Environment of the Supernova-less Long-duration GRB 111005A Open
Long (>2 s) gamma-ray bursts (GRBs) are associated with explosions of massive stars, although in three instances, supernovae (SNe) have not been detected, despite deep observations. With new H i line and archival optical integral-field spe…
View article: The interstellar medium in the environment of the supernova-less long-duration GRB 111005A
The interstellar medium in the environment of the supernova-less long-duration GRB 111005A Open
Long ($>2$ s) gamma ray bursts (GRBs) are associated with explosions of massive stars, although in three instances, supernovae (SNe) have not been detected, despite deep observations. With new HI line and archival optical integral field sp…
View article: Deep Upper Limit on the Optical Emission during a Hard X-Ray Burst from the Magnetar SGR J1935+2154
Deep Upper Limit on the Optical Emission during a Hard X-Ray Burst from the Magnetar SGR J1935+2154 Open
In 2021 September the magnetar SGR J1935+2154 entered a stage of burst/flaring activity in the hard X-ray band. On 2021 September 10, we observed SGR J1935+2154 with the fiber-fed fast optical photon counter IFI+Iqueye, mounted at the 1.22…