2 papers
astro-ph.SR2026
Refined reduction and standardisation of 53 years of UBV photometry at Hvar
Hrvoje BožiÄ, Hrvoje Božić, BožiÄ Hrvoje +48
Emission-line stars classified as Be exhibit light and colour variability on various timescales, ranging from days to decades. Their evolution must be constrained by long-term obse…
astro-ph.HE2024
An IXPE-Led X-ray Spectro-Polarimetric Campaign on the Soft State of Cygnus X-1: X-ray Polarimetric Evidence for Strong Gravitational Lensing
James F. Steiner, Edward Nathan, Kun Hu +134
We present the first X-ray spectropolarimetric results for Cygnus X-1 in its soft state from a campaign of five IXPE observations conducted during 2023 May-June. Companion multiwav…