3 papers
astro-ph.HE2026
X-ray and Gamma-ray Emission from a High-Temperature Plasma and the Spectra of Accreting Black Holes
S. A. Grebenev
We present our numerical computations of broadband radiation spectra forming in a layer of high-temperature (kTe ~ 50 keV) semitransparent (with a Thomson optical depth ~1-3) plasm…
astro-ph.HE2025
Search for Astrophysical Transients on Limiting Time Scales and Their Classification Based on INTEGRAL Data
G. Yu. Mozgunov, A. S. Pozanenko, P. Yu. Minaev +7
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 obse…
astro-ph.HE2025
From precursor to afterglow: The complex evolution of GRB 210312B
M. JelÃnek, S. A. Grebenev, P. Yu. Minaev +15
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…