Explanipedia

From precursor to afterglow: The complex evolution of GRB 210312B Open

M. Jelínek, С. А. Гребенев, P. Yu. Minaev, C. C. Thöne, A. de Ugarte Postigo , et al. · 2025

Context. Long gamma-ray bursts (GRBs) are characterized by a brief gamma-ray flash followed by a longer-lasting multiwavelength afterglow. The basic mechanism is largely understood, and the early afterglow evolution often shows complex fea…

Pushchino multibeam pulsar search – V. The bright FRB 20190203 detected at 111 MHz Open

S. А. Tyul’bashev, В. А. Самодуров, A. Pozanenko, E. A. Brylyakova, С. А. Гребенев , et al. · 2025

Since August 2014, a monitoring survey at a frequency of 111 MHz has been conducted on the Large Phased Array (LPA) radio telescope of the P.N. Lebedev Physical Institute (LPI). We report the discovery of a bright pulse having a dispersion…

Search for Astrophysical Transients on Limiting Time Scales and Their Classification Based on INTEGRAL Data Open

G. Yu. Mozgunov, A. Pozanenko, P. Yu. Minaev, И. В. Человеков, С. А. Гребенев , et al. · 2024

We have searched for ultra-long (> 100 s) gamma-ray transients in the data from the anticoincidence shield (ACS) of the SPI gamma-ray spectrometer onboard the INTEGRAL orbital observatory and classified them by machine learning methods. We…

Pushchino multibeam pulsar search -- V. The bright FRB 20190203 detected at 111 MHz Open

S. А. Tyul’bashev, В. А. Самодуров, A. Pozanenko, E. A. Brylyakova, С. А. Гребенев , et al. · 2024

We report the discovery of a bright pulse having a dispersion measure (DM) equal to 134.4 \pm 2 pc cm^{-3}, a peak flux density (S_p) equal to 20 \pm 4 Jy and a half-width (W_e) equal to 211 \pm 6 ms. The excessive DM of the pulse, after t…

GRB 231115A -- a magnetar giant flare in the M82 galaxy Open

P. Yu. Minaev, A. Pozanenko, С. А. Гребенев, И. В. Человеков, N. Pankov , et al. · 2024

The results of a study of the short gamma-ray burst GRB 231115A in the X-ray and gamma-ray ranges are presented, based on data from the INTEGRAL and Fermi space observatories. The source of the burst is localized by the IBIS/ISGRI telescop…

GRB 201015A: from seconds to months of optical monitoring and supernova discovery Open

S. Belkin, A. Pozanenko, P. Yu. Minaev, N. Pankov, A. Volnova , et al. · 2023

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…

Calibrating SPI-ACS/INTEGRAL for gamma-ray bursts and re-estimating energetics of GRB/GW 190425 in gamma-ray range Open

P. Yu. Minaev, A. Pozanenko · 2023

SPI-ACS/INTEGRAL is one of the most sensitive orbital gamma-ray detectors in energy range above 80 keV. Since 2002 it registered several thousands of gamma-ray bursts (GRBs), including the bursts associated with LIGO-Virgo gravitational wa…

The Upcoming GAMMA-400 Experiment Open

S. I. Suchkov, I. V. Arkhangelskaja, A. I. Arkhangelskiy, A. Bakaldin, И. В. Чернышева , et al. · 2023

The upcoming GAMMA-400 experiment will be implemented aboard the Russian astrophysical space observatory, which will be operating in a highly elliptical orbit over a period of 7 years to provide new data on gamma-ray emissions and cosmic-r…

Chromatic Afterglow of GRB 200829A Open

N. Pankov, A. Pozanenko, P. Yu. Minaev, S. Belkin, A. Volnova , et al. · 2023

We present the results of our analysis of multiwavelength observations for\nthe long gamma-ray burst GRB 200829A. The burst redshift $z \\approx 1.29 \\pm\n0.04$ has been determined photometrically at the afterglow phase. In gamma rays\nth…

The Peculiar Short-duration GRB 200826A and Its Supernova* Open

A. Rossi, Barry Rothberg, E. Palazzi, Д. А. Канн, P. D’Avanzo , et al. · 2022

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…

Gamma- and Cosmic-Ray observations with the GAMMA-400 Gamma-Ray telescope Open

N. P. Topchiev, A. M. Galper, I. V. Arkhangelskaja, A. I. Arkhangelskiy, A. Bakaldin , et al. · 2022

Probing into emission mechanisms of GRB 190530A using time-resolved spectra and polarization studies: Synchrotron Origin? Open

Rahul Gupta, Soumya Gupta, Tanmoy Chattopadhyay, V. Lipunov, A. J. Castro‐Tirado , et al. · 2022

Multi-pulsed GRB 190530A, detected by the GBM and LAT onboard Fermi, is the sixth most fluent GBM burst detected so far. This paper presents the timing, spectral, and polarimetric analysis of the prompt emission observed using AstroSat and…

Gamma- and Cosmic-Ray Observations with the GAMMA-400 Gamma-Ray Telescope Open

N. P. Topchiev, A. M. Galper, I. V. Arkhangelskaja, A. I. Arkhangelskiy, A. Bakaldin , et al. · 2021

The future space-based GAMMA-400 gamma-ray telescope will operate onboard the Russian astrophysical observatory in a highly elliptic orbit during 7 years to observe Galactic plane, Galactic Center, Fermi Bubbles, Crab, Vela, Cygnus X, Gemi…

Erratum: The Ep,i–Eiso correlation: type I gamma-ray bursts and the new classification method Open

P. Yu. Minaev, A. Pozanenko · 2021

Capabilities of the GAMMA-400 gamma-ray telescope to detect gamma-ray bursts from lateral directions Open

A. Leonov, A. M. Galper, N. P. Topchiev, I. V. Arkhangelskaja, A. I. Arkhangelskiy , et al. · 2021

The currently developing space-based gamma-ray telescope GAMMA-400 will measure the gamma-ray and electron + positron fluxes using the main top-down aperture in the energy range from ~20 MeV to several TeV in a highly elliptic orbit (witho…

Extended Emission of Cosmic Gamma-Ray Bursts Detected in the SPI-ACS/INTEGRAL Experiment Open

G. Yu. Mozgunov, P. Yu. Minaev, A. Pozanenko · 2021

We have carried out a systematic analysis of the gamma-ray bursts' (GRBs) light curves detected in the SPI-ACS experiment onboard the INTEGRAL observatory aimed to search extended emission. The emission occasionally recorded after the prom…

OUP accepted manuscript Open

Rahul Gupta, S. R. Oates, S. B. Pandey, A. J. Castro‐Tirado, Jagdish C. Joshi , et al. · 2021

We present and perform a detailed analysis of multi-wavelength observations of \thisgrb, an optical bright GRB with an observed reverse shock (RS) signature. Observations of this GRB were acquired with the BOOTES-4 robotic telescope, the \…

Capabilities of the GAMMA-400 gamma-ray telescope for lateral aperture Open

А. В. Михайлова, A. Bakaldin, И. В. Чернышева, A. M. Galper, M. D. Kheymits , et al. · 2020

The future GAMMA-400 γ-ray telescope will provide fundamentally new data on discrete sources and spectra of γ-ray emissions and electrons + positrons due to its unique angular and energy resolutions in the wide energy range from 20 MeV up …

GRB 200415A: Magnetar Giant Flare or Short Gamma-Ray Burst? Open

P. Yu. Minaev, A. Pozanenko · 2020

A detailed analysis of the GBM/Fermi experiment data is carried out to classify GRB 200415A. It is shown that, on the one hand, this event exhibits typical for type I (short) gamma-ray bursts (GRBs) properties, such as duration, variabilit…

The Ep,i–Eiso correlation: type I gamma-ray bursts and the new classification method Open

P. Yu. Minaev, A. Pozanenko · 2019

We present the most extensive sample of 45 type I (short) and 275 type II (long) gamma-ray bursts (GRBs) with known redshift to investigate the correlation between the rest-frame peak energy, Ep,i and the total isotropic equivalent energy,…

Universat-SOCRAT multi-satellite project to study TLEs and TGFs Open

M. I. Panasyuk, П. А. Климов, С. И. Свертилов, А. А. Белов, V. V. Bogomolov , et al. · 2019

We present concept of a new multi-satellite Universat-SOCRAT project aimed to study transient phenomena in the upper atmosphere such as transient luminous events (TLEs) and terrestrial gamma-ray flashes (TGFs). It is a new space project of…

A multiwavelength analysis of a collection of short-duration GRBs observed between 2012 and 2015 Open

S. B. Pandey, Y. D. Hu, A. J. Castro–Tirado, A. Pozanenko, R. Sánchez-Ramírez , et al. · 2019

We investigate the prompt emission and the afterglow properties of short-duration gamma-ray burst (sGRB) 130603B and another eight sGRB events during 2012–2015, observed by several multiwavelength facilities including the Gran Canarias Tel…

Inhomogeneities in the light curves of gamma-ray bursts afterglow Open

E. Mazaeva, A. Pozanenko, P. Yu. Minaev · 2018

We discuss the inhomogeneous behavior of gamma-ray burst afterglow light curves in optic. We use well-sampled light curves based on mostly our own observations to find and identify deviations (inhomogeneities) from broken power law. By the…

Publisher Correction: Transition from fireball to Poynting-flux-dominated outflow in the three-episode GRB 160625B Open

Bin‐Bin Zhang, Bing Zhang, A. J. Castro‐Tirado, Zi-Gao Dai, P. H. T. Tam , et al. · 2018

Cosmic gamma-ray bursts detected in the RELEC experiment onboard the Vernov satellite Open

A. V. Bogomolov, В. В. Богомолов, A. F. Iyudin, Е. А. Кузнецова, P. Yu. Minaev , et al. · 2017

The RELEC scientific instrumentation onboard the Vernov spacecraft launched\non July 8, 2014, included the DRGE gamma-ray and electron spectrometer. This\ninstrument incorporates a set of scintillation phoswich detectors, including\nfour i…

Precursors of short gamma-ray bursts in the SPI-ACS/INTEGRAL experiment Open

P. Yu. Minaev, A. Pozanenko · 2017

We have analyzed the light curves of 519 short gamma-ray bursts (GRBs)\ndetected in the SPI-ACS/INTEGRAL experiment from December 2002 to May 2014 to\nsearch for precursors. Both the light curves of 519 individual events and the\naveraged …

Multicolour modelling of SN 2013dx associated with GRB 130702A★ Open

A. Volnova, M. V. Pruzhinskaya, A. Pozanenko, С. И. Блинников, P. Yu. Minaev , et al. · 2016

We present optical observations of SN 2013dx, related to the Fermi burst GRB\n130702A occurred at a redshift z = 0.145. It is the second-best sampled GRB-SN\nafter SN~1998bw: the observational light curves contain more than 280 data\npoint…

Transition from Fireball to Poynting-flux-dominated Outflow in Three-Episode GRB 160625B Open

B.-B. Zhang, B. Zhang, A. J. Castro‐Tirado, Z. G. Dai, P. H. T. Tam , et al. · 2016

The ejecta composition is an open question in gamma-ray bursts (GRB) physics. Some GRBs possess a quasi-thermal spectral component in the time-resolved spectral analysis, suggesting a hot fireball origin. Others show a featureless non-ther…

Transition from fireball to Poynting-flux-dominated outflow in three-episode GRB 160625B [submitted version] Open

Ignacio de Gregorio Monsalvo, B.-B. Zhang, B. Zhang, A. J. Castro‐Tirado, Z. G. Dai , et al. · 2016

The ejecta composition of gamma-ray bursts (GRBs) is an open question in GRB physics. Some GRBs possess a quasi-thermal spectral component in the time-resolved spectral analysis, suggesting a hot fireball origin. Some others show an essent…

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