Astronomical Institute of the Slovak Academy of Sciences

Options for Compression of radio interferometry data: lossy compression of visibilities and lossless compression of uv-visibility grids for the MHONGOOSE survey

Abstract Next generation radio astronomy telescopes are challenging existing data reduction paradigms. With ever more antennas, larger bandwidths, and sometimes multiple primary beams, they often generate more observed data products than can readily be stored long-term. Thus, dat...

Joint XMM-Newton and NuSTAR Observations of Type I X-ray Bursts from the Dipping Low-Mass X-ray Binary 4U 1323–62

Abstract In this study, we report partly simultaneous XMM-Newton and NuSTAR observations of the bursting, dipping low mass X-ray binary, 4U 1323–62 obtained in 2024. 4U 1323–62 is one of the well-known persistent bursters, with bursts occurring roughly every three hours. It is al...

Studies of Two Post Common Envelope Binary Stars

Abstract New time series photometry of the short period (P < 0.2 d) binary stars ZTF J032906.36+070408.3 (ZTF 0329) and ATO J090.7238+00.5996 (ATL 0602) is presented. The primary (hotter) stars in both systems are white dwarfs, while the cooler stars are M dwarfs. Archival photom...

Hot blue progenitors of stellar-mass black holes

Abstract While the connection between massive stars and supernova explosions is well established observationally, the link between massive stars and black hole formation remains elusive. Some massive stars may collapse directly to black holes without a successful supernova, and m...

Particle Creation in a Cosmological Background in Analogy to the Schwinger Effect

Abstract We consider a gravitational analogue of the Schwinger effect in a cosmological context. While the Schwinger effect is usually attributed to a static electric background, its derivation is actually based on a switching on/off of the electric field in the infinite past/fut...

STARSFLUX: an all-sky catalogue of absolute spectro-photometric calibrators from 0.3 to 30 μ m

Abstract Obtaining accurate fluxes of faint sources from the ground in near- and mid-infrared wavelengths is challenging because of the rapidly changing atmospheric absorption. A common limitation is the lack of a nearby spectro-photometric calibrator. We present the STellar Abso...