3 papers
astro-ph.HE2026
[HP99] 159 -- Properties of the first Supersoft X-ray Source with a Helium star donor
Hélène Szegedi, Philip A. Charles, David A. H. Buckley +3
[HP99] 159 is remarkable as the first supersoft X-ray source (SSS) identified with an evolved helium star donor. With a likely orbital period of 1.164 d or 2.327 d, the origin of t…
astro-ph.HE2025
Exploring Hard X-ray Properties of -ray Emitting Narrow Line Seyfert-I Galaxies through NuSTAR Observations
Suvas Chandra Chaudhary, Raj Prince, Brian van Soelen +1
We studied the six gamma-ray-detected Narrow Line Seyfert 1 (NLSy1) galaxies using the hard X-ray observations from Nuclear Spectroscopic Telescope Array (NuSTAR) and optical g- \&…
astro-ph.SR2024
Millinovae: A New Class of Transient Supersoft X-ray Sources without a Classical Nova Eruption
Przemek Mróz, Krzysztof Król, Hélène Szegedi +18
Some accreting binary systems containing a white dwarf (such as classical novae or persistent supersoft sources) are seen to emit low-energy X-rays with temperatures of ~10^6 K and…