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Article
The Evolutionary State of Near-Earth Comet 7P/Pons–Winnecke
7P/Pons–Winnecke is a near-Earth short-period comet of a moderate activity level. In this paper, we present the analysis of observations performed during a favorable apparition of the comet in 2021, indicating...
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Article
GRB 231115A—a Magnetar Giant Flare in the M82 Galaxy
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...
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Article
Systematics and Biases in Observations of Supernovae Associated with Gamma-Ray Bursts
Detection, observation and description of supernovae associated with gamma-ray bursts are currently topical tasks in the field of transient phenomena. From the moment an assumption is made about the relationsh...
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Article
Cross-Correlation Methods in Problem of Search and Identification of Transient Objects in Astronomical Images
The paper considers the effectiveness of various methods of cross-correlation of astronomical catalogs in solving the problem of search and identification of the sources of rapidly varying brightness, i.e., of...
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Article
Chromatic Afterglow of GRB 200829A
We present the results of our analysis of multiwavelength observations for the long gamma-ray burst GRB 200829A. The burst redshift $$...
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Article
Gamma-Ray Bursts: Multiwavelength Investigations and Models
We present a brief history and the current status of research on gamma-ray bursts (GRBs), including observations at various GRB phases: the prompt emission, afterglow, supernova/kilonova, and the host galaxy. ...
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Article
Extended Emission of Cosmic Gamma-Ray Bursts Detected in the SPI-ACS/INTEGRAL Experiment
We have carried out a systematic analysis of the light curves of gamma-ray bursts (GRBs) detected in the SPI-ACS experiment onboard the INTEGRAL observatory to search for extended emission. The emission occasi...
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Article
Multiwavelength Observations of GRB 181201A and Detection of Its Associated Supernova
Multicolor photometric observations in the optical band and a comprehensive study in the X-ray, gamma-ray, and radio bands are presented for GRB 181201A and its afterglow. The optical observations began ...
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Article
GRB 200415A: Magnetar Giant Flare or Short Gamma-Ray Burst?
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...
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Article
Convergence Space Experiment: Scientific Objectives, Onboard Equipment, and Methods of Solving Inverse Problems
The purpose of this research is to present a detailed description of the proposed Convergence space mission on the Russian segment of the International Space Station for the wider scientific community. The key...
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Article
Observation of the Second LIGO/Virgo Event Connected with a Binary Neutron Star Merger S190425z in the Gamma-Ray Range
The results of observations of the gravitational-wave (GW) event S190425z recorded by the LIGO/Virgo detectors with the anti-coincidence shield (ACS) of the SPI gamma-ray spectrometer onboard the INTEGRAL obse...
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Article
New Gamma-Ray Bursts Found in the Archival Data from the IBIS/ISGRI Telescope of the INTEGRAL Observatory
A systematic search for cosmic gamma-ray bursts (GRBs) and other short hard X-ray events in the archival data from the IBIS/ISGRI telescope of the INTEGRAL observatory over 2003–2018 has been carried out. Seve...
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Article
Cosmic gamma-ray bursts detected in the RELEC experiment onboard the Vernov satellite
The RELEC scientific instrumentation onboard the Vernov spacecraft launched on July 8, 2014, included the DRGE gamma-ray and electron spectrometer. This instrument incorporates a set of scintillation phoswich ...
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Article
Can Flare Stars Explain the Annihilation Line from the Galactic Bulge?
We consider the low-mass flare stars which form the bulk of the population in the galactic bulge as a source of the positrons needed to form the observed narrow annihilation line from the galactic bulge. Estim...
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Article
Precursors of short gamma-ray bursts in the SPI-ACS/INTEGRAL experiment
We have analyzed the light curves of 519 short gamma-ray bursts (GRBs) detected in the SPI-ACS/INTEGRAL experiment from December 2002 toMay 2014 to search for precursors (a possible activity of the GRB source ...
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Article
Conceptual approach to astronomical problems
New technical capabilities have brought about the swee** growth of the amount of data acquired by the astronomers from observations with different instruments in various parts of the electromagnetic spectrum...
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Article
Catalog of short gamma-ray transients detected in the SPI/INTEGRAL experiment
We analyzed the data obtained by the SPI telescope onboard the INTEGRAL observatory to search for short transient events with a duration from 1 ms to a few tens of seconds. An algorithm for identifying gamma-r...
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Article
GRB 070912—A gamma-ray burst recorded from the direction to the galactic center
The detection of GRB 070912 recorded in the field of view of the SPI, IBIS/ISGRI, and JEMX telescope on September 12, 2007, at 07h32m19s (UT) when analyzing the INTEGRAL archival data is reported. The burst is on...
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Article
Searching for high-energy gamma emissions from cosmic gamma ray bursts
We present the results from our search for gamma ray bursts of high energy with the Andyrchy air shower array of the Baksan Neutrino Observatory of the Russian Academy of Sciences’ Institute for Nuclear Resear...
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Article
About the measurements of the hard X-ray background
We analyze uncertainties in the cosmic X-ray background measurements performed by the INTEGRAL observatory. We find that the most important effect limiting the accuracy of the measurements is related to the in...
