Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Vojtěch Šimon"'
Autor:
Vojtěch Šimon
Publikováno v:
The Astronomical Journal, Vol 167, Iss 4, p 152 (2024)
We show the postnova activity of Q Cyg (Nova Cyg 1876) and BK Lyn (probable Nova Lyn 101). We use both CCD and photographic photometric observations. We show that both systems lie close to the upper limit of the luminosity in which dwarf nova (DN) ou
Externí odkaz:
https://doaj.org/article/fac7b67aaa364a459bddb3b04e0fac76
Autor:
Vojtěch Šimon
Publikováno v:
The Astronomical Journal, Vol 165, Iss 3, p 102 (2023)
We show a relation of the pre- and post-nova activity of CT Ser (nova 1948) and V446 Her (nova 1960), known to have remarkably similar orbital periods P _orb . We use both photographic and CCD photometric observations. Post-nova CT Ser shows a nova-l
Externí odkaz:
https://doaj.org/article/fc99e27c95234106b8d5105ad133ca3e
Autor:
Vojtěch Šimon
Publikováno v:
Acta Polytechnica CTU Proceedings, Vol 1, Iss 1, Pp 246-250 (2014)
The X-ray binary with the neutron star (NS), KS 1731-260, displays superorbital cycle similar to that in Her X-1. The accretion disk had the memory of the cycle-length even when this modulation sometimes disappeared in the main outburst of KS 1731-26
Externí odkaz:
https://doaj.org/article/448fbc3b49444fce99e09543ae8ddfda
Autor:
Vojtěch Šimon
Publikováno v:
Acta Polytechnica, Vol 54, Iss 3, Pp 248-253 (2014)
We show the importance of observing low-mass binary (LMXB) X-ray sources with the X-ray monitors onboard satellites. This enables us to study the physical processes governing the longterm activity of LMXBs. They are excellent targets for monitoring b
Externí odkaz:
https://doaj.org/article/9b52514613d6497b9c2965d6efd77a12
Publikováno v:
Advances in Astronomy, Vol 2010 (2010)
The ESA satellite to be launched in 2012 will focus on highly precise astrometry of stars and all objects down to limiting magnitude 20. Albeit focusing on astrometry related matters, the satellite will also provide photometric and spectral informati
Externí odkaz:
https://doaj.org/article/d3761b4e0f8a4aa18b034c993dc0d18f
Autor:
Vojtěch Šimon
Publikováno v:
Advances in Astronomy, Vol 2010 (2010)
We review current results and perspectives of the photometric monitoring of the optical counterparts of X-ray sources of various kinds (binary X-ray sources (cataclysmic variables and low-mass X-ray binaries, supersoft X-ray sources, microquasars), g
Externí odkaz:
https://doaj.org/article/3331ef26fae249f59d9884f79c3cba11
Autor:
Vojtěch Šimon, René Hudec
Publikováno v:
Journal of High Energy Astrophysics. 35:69-76
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c716f793fa150e724600267ea7ae75f
https://doi.org/10.1016/j.jheap.2022.06.001
https://doi.org/10.1016/j.jheap.2022.06.001
Autor:
Vojtěch Šimon
Publikováno v:
Publications of the Astronomical Society of Japan. 74:569-577
V1363 Cyg is a cataclysmic variable (CV) and a post-nova. Our analysis of its long-term optical activity used the archival data from the AAVSO database and literature. We showed that the accretion disk of V1363 Cyg is exposed to the thermal-viscous i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c461d8ecc112471e95c09310f9b20b9b
https://doi.org/10.1093/pasj/psac017
https://doi.org/10.1093/pasj/psac017
Autor:
Vojtěch Šimon
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 505:161-171
Intermediate polars (IPs) are cataclysmic variables with mildly magnetized white dwarfs (WDs). This analysis of the long-term optical activity of five examples of IPs with accretion discs used data from the Catalina Real-time Transient Survey, Digita
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a3a92ce98b7509372867fefe6edd517
https://doi.org/10.1093/mnras/stab739
https://doi.org/10.1093/mnras/stab739
Autor:
Vojtěch Šimon
Publikováno v:
Publications of the Astronomical Society of Japan. 72
4U 1608–52 is a soft X-ray transient. The analysis presented here of a particular part of its X-ray activity uses observations of RXTE/ASM and Swift/BAT. We show a time segment (MJD 54262–MJD 55090) (828 d) in which 4U 1608–52 behaved as a quas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5524cec5404001835ea55d377f8f33c1
https://doi.org/10.1093/pasj/psaa099
https://doi.org/10.1093/pasj/psaa099