Pub Date : 2024-02-01DOI: 10.31577/caosp.2024.54.2.75
M. Perko
,
,
{"title":"Accreting-only symbiotic stars in the era of large Galactic Archeology spectroscopic surveys","authors":"M. Perko","doi":"10.31577/caosp.2024.54.2.75","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.75","url":null,"abstract":",","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"992 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140467295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-01DOI: 10.31577/caosp.2024.54.2.98
A. Maliuk, J. Budaj, D. Mkrtichian, Z. Garai, S. Zharikov, T. Pribulla, R. Komžík, A. Kusakin, L. Shestakova, R. Kokumbaeva, I. Reva, S. Joshi, A. Valeev, D. Gadelshin, G. Valyavin, N. A-thano, R. Mennickent, A. Serebryanskiy, T.G. Kaye
. WD 1145+017 is the first white dwarf known to be orbited by disintegrating exoasteroids. It is a helium-dominated white dwarf with lines of metals in spectra and variable asymmetric transits. The analysis of WD 1145 light curve allowed us to identify at least 8 bodies which periodically eclipse the star, showing periods ranging from 4.490 to 4.493 hours. Waterfall diagram shows that some of these periods are not stable. Estimating transit depths gave us possibility to assess the disintegration rate. We have estimated the lower limit of dust masses associated with these bodies, which exhibits time-varying characteristics, fluctuating within the range of approximately 2 − 3 × 10 14 kg.
{"title":"Studying of exoasteroids orbiting around WD 1145+017","authors":"A. Maliuk, J. Budaj, D. Mkrtichian, Z. Garai, S. Zharikov, T. Pribulla, R. Komžík, A. Kusakin, L. Shestakova, R. Kokumbaeva, I. Reva, S. Joshi, A. Valeev, D. Gadelshin, G. Valyavin, N. A-thano, R. Mennickent, A. Serebryanskiy, T.G. Kaye","doi":"10.31577/caosp.2024.54.2.98","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.98","url":null,"abstract":". WD 1145+017 is the first white dwarf known to be orbited by disintegrating exoasteroids. It is a helium-dominated white dwarf with lines of metals in spectra and variable asymmetric transits. The analysis of WD 1145 light curve allowed us to identify at least 8 bodies which periodically eclipse the star, showing periods ranging from 4.490 to 4.493 hours. Waterfall diagram shows that some of these periods are not stable. Estimating transit depths gave us possibility to assess the disintegration rate. We have estimated the lower limit of dust masses associated with these bodies, which exhibits time-varying characteristics, fluctuating within the range of approximately 2 − 3 × 10 14 kg.","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"132 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140470495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-01DOI: 10.31577/caosp.2024.54.2.167
Š. Parimucha, Pavol Gajdoš, Y. Markus, V. Kudak
{"title":"Deep-learning classification of eclipsing binaries","authors":"Š. Parimucha, Pavol Gajdoš, Y. Markus, V. Kudak","doi":"10.31577/caosp.2024.54.2.167","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.167","url":null,"abstract":"","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"829 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140465903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-01DOI: 10.31577/caosp.2024.54.2.85
A. Skopal
. In this contribution I summarize the main characteristics and effects that are observed during outbursts of symbiotic stars: properties of the hot-and warm-type outbursts, enhanced mass outflow occasionally followed by ejection of bipolar jets, and the emergence of a neutral near-orbital-plane region. The results presented were largely obtained using small telescopes, supplemented by observations from the archives of terrestrial and space observatories
{"title":"Exploring outbursts of accreting white dwarfs in symbiotic binaries -- basic concept","authors":"A. Skopal","doi":"10.31577/caosp.2024.54.2.85","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.85","url":null,"abstract":". In this contribution I summarize the main characteristics and effects that are observed during outbursts of symbiotic stars: properties of the hot-and warm-type outbursts, enhanced mass outflow occasionally followed by ejection of bipolar jets, and the emergence of a neutral near-orbital-plane region. The results presented were largely obtained using small telescopes, supplemented by observations from the archives of terrestrial and space observatories","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"1147 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140466905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-01DOI: 10.31577/caosp.2024.54.2.29
L. Zampieri, M. Fiori, G. Naletto, A. Spolon, C. Barbieri, A. Burtovoi, U. Munari, G. Umbriaco, B. Gaiani, L. Lessio, P. Ochner
. Fast sub-second optical variability exists in some important classes of astrophysical sources, in particular pulsars and X-ray binaries. We regularly perform ultra-fast optical photometric campaigns on some of the most interesting targets and transient events. At the same time, we are tackling new campaigns searching for fast optical variability in other types of sources (Fast Radio Bursts, magnetars). To this end we use and develop dedicated fast photon counting instrumentation in the visible band, an area in which our team is the leader. Observations are carried out within the framework of multiwave-length campaigns and in synergy with facilities operating at other wavelengths. Here we report on some of the most recent observing campaigns and technological developments, and on the outcome of a km-baseline experiment of stellar intensity interferometry carried out in photon counting mode.
.在一些重要的天体物理源类别中，尤其是脉冲星和 X 射线双星中，存在着快速的亚秒级光学变异。我们定期对一些最有趣的目标和瞬变事件进行超快光学测光活动。与此同时，我们还在开展新的活动，在其他类型的天体源（快速射电暴、磁星）中寻找快速光学变异性。为此，我们在可见光波段使用并开发了专用的快速光子计数仪器，我们的团队在这一领域处于领先地位。观测是在多波长活动的框架内进行的，并与其他波长的设施协同工作。在此，我们将报告最近的一些观测活动和技术发展情况，以及以光子计数模式进行的恒星强度干涉测量千米基线实验的结果。
{"title":"Fast photon-counting optical astronomy","authors":"L. Zampieri, M. Fiori, G. Naletto, A. Spolon, C. Barbieri, A. Burtovoi, U. Munari, G. Umbriaco, B. Gaiani, L. Lessio, P. Ochner","doi":"10.31577/caosp.2024.54.2.29","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.29","url":null,"abstract":". Fast sub-second optical variability exists in some important classes of astrophysical sources, in particular pulsars and X-ray binaries. We regularly perform ultra-fast optical photometric campaigns on some of the most interesting targets and transient events. At the same time, we are tackling new campaigns searching for fast optical variability in other types of sources (Fast Radio Bursts, magnetars). To this end we use and develop dedicated fast photon counting instrumentation in the visible band, an area in which our team is the leader. Observations are carried out within the framework of multiwave-length campaigns and in synergy with facilities operating at other wavelengths. Here we report on some of the most recent observing campaigns and technological developments, and on the outcome of a km-baseline experiment of stellar intensity interferometry carried out in photon counting mode.","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"1217 46","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140467111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-01DOI: 10.31577/caosp.2024.54.2.107
F. Teyssier, F. Sims
,
,
{"title":"ARAS eruptive stars monitoring","authors":"F. Teyssier, F. Sims","doi":"10.31577/caosp.2024.54.2.107","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.107","url":null,"abstract":",","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"279 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140466504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-01DOI: 10.31577/caosp.2024.54.2.234
I. Soszyński
. The Optical Gravitational Lensing Experiment (OGLE) is one of the most extensive sky surveys on a global scale. It focuses on optical astrophysical variability and is carried out using the dedicated 1.3-meter Warsaw Telescope located at Las Campanas Observatory in Chile. Since 1992, the OGLE project has been continuously observing the densest regions of the southern sky, namely, the Galactic bulge, Galactic disk, and Magellanic Clouds. To date, the survey has collected over a trillion individual photometric observations for approximately two billion stars. Throughout its long history, the OGLE project has yielded significant contributions to various fields of astrophysics, including gravitational lensing and microlensing, dark matter, exoplanets, variable stars, the structure of the Milky Way and other galaxies, and more. This article presents the most significant achievements of OGLE over the past 30 years.
{"title":"Three decades of the OGLE survey","authors":"I. Soszyński","doi":"10.31577/caosp.2024.54.2.234","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.234","url":null,"abstract":". The Optical Gravitational Lensing Experiment (OGLE) is one of the most extensive sky surveys on a global scale. It focuses on optical astrophysical variability and is carried out using the dedicated 1.3-meter Warsaw Telescope located at Las Campanas Observatory in Chile. Since 1992, the OGLE project has been continuously observing the densest regions of the southern sky, namely, the Galactic bulge, Galactic disk, and Magellanic Clouds. To date, the survey has collected over a trillion individual photometric observations for approximately two billion stars. Throughout its long history, the OGLE project has yielded significant contributions to various fields of astrophysics, including gravitational lensing and microlensing, dark matter, exoplanets, variable stars, the structure of the Milky Way and other galaxies, and more. This article presents the most significant achievements of OGLE over the past 30 years.","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"35 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140463482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-01DOI: 10.31577/caosp.2024.54.2.22
S. Yal¸cınkaya, E. M. Esmer, ¨O. Ba¸st¨urk
,
,
{"title":"ObsMap: Preparing observing maps with the best comparison stars for photometry","authors":"S. Yal¸cınkaya, E. M. Esmer, ¨O. Ba¸st¨urk","doi":"10.31577/caosp.2024.54.2.22","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.22","url":null,"abstract":",","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"643 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140469510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-01DOI: 10.31577/caosp.2024.54.2.15
M. Minev, N. Petrov, E. Semkov
{"title":"Technical performance and first light of the new 1.5-meter telescope at the National Astronomical Observatory Rozhen","authors":"M. Minev, N. Petrov, E. Semkov","doi":"10.31577/caosp.2024.54.2.15","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.15","url":null,"abstract":"","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"302 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140467973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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