Pub Date : 2022-04-01DOI: 10.31577/caosp.2022.52.1.64
A. Skopal, R. Komžík
{"title":"Editorial","authors":"A. Skopal, R. Komžík","doi":"10.31577/caosp.2022.52.1.64","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.1.64","url":null,"abstract":"","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48421587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.31577/caosp.2022.52.1.46
D. Tsvetkov, I. Volkov, S. Shugarov, V. Metlov, N. N. Pavlyuk, O. Vozyakova, N. Shatsky
. We present 57 photometric epochs of superluminous SN 2017egm in NGC3191, covering the period of 285 days, and 36 epochs of peculiar object AT 2018cow, for which observations lasted 69 days. UBV RI photometry was carried out with 7 telescopes at 5 locations, including the 2.5-m telescope at the Caucasus Mountain Observatory of the Sternberg Astronomical Institute. The light and color curves of SN 2017egm were compared to several well-studied objects of similar type. The light curves of SN 2017egm show definite undulations: a shoulder at phase 114 days past maximum and a plateau lasting for a phase interval 155–235 days. We determined the basic parameters of the light curves for SN 2017egm and AT 2018cow: dates and magnitudes of maximum light, rates of decline at different stages of evolution in different bands.
{"title":"Photometric observations of SN 2017egm and peculiar transient AT 2018cow","authors":"D. Tsvetkov, I. Volkov, S. Shugarov, V. Metlov, N. N. Pavlyuk, O. Vozyakova, N. Shatsky","doi":"10.31577/caosp.2022.52.1.46","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.1.46","url":null,"abstract":". We present 57 photometric epochs of superluminous SN 2017egm in NGC3191, covering the period of 285 days, and 36 epochs of peculiar object AT 2018cow, for which observations lasted 69 days. UBV RI photometry was carried out with 7 telescopes at 5 locations, including the 2.5-m telescope at the Caucasus Mountain Observatory of the Sternberg Astronomical Institute. The light and color curves of SN 2017egm were compared to several well-studied objects of similar type. The light curves of SN 2017egm show definite undulations: a shoulder at phase 114 days past maximum and a plateau lasting for a phase interval 155–235 days. We determined the basic parameters of the light curves for SN 2017egm and AT 2018cow: dates and magnitudes of maximum light, rates of decline at different stages of evolution in different bands.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45535126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.31577/caosp.2022.52.1.32
W. Elsanhoury, A. Al‐Johani, Noha H. El Fewaty, A. Haroon
. In this work, we carry out by utilizing the distance equation with providing some basic descriptive statistics for both apparent and absolute magnitudes, the distances of some open clusters (i.e., Hyades, Pleiades, IC 2391, Koposov 12, Koposov 43, NGC 1348, NGC 2112, NGC 4337, SAI 24, and SAI 94) with the assumption that all members N are scattering around a mean absolute magnitude in a Gaussian distribution. Our numerical obtained results are in good agreement with previously calculated values. In the second part of the paper, we have calculated the luminosity function of Hyades open cluster by Salpeter’s normalized function Ψ( M V ) due to frequency distribution function Φ( M V ), on this way, we have got a very significant relationship between them with absolute magnitudes M V (i.e., the linear correlation coefficient ∼ 0.995), and the error analysis are also given.
{"title":"Distance determination by magnitude analysis of some open clusters with GAIA era and stellar luminosity function","authors":"W. Elsanhoury, A. Al‐Johani, Noha H. El Fewaty, A. Haroon","doi":"10.31577/caosp.2022.52.1.32","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.1.32","url":null,"abstract":". In this work, we carry out by utilizing the distance equation with providing some basic descriptive statistics for both apparent and absolute magnitudes, the distances of some open clusters (i.e., Hyades, Pleiades, IC 2391, Koposov 12, Koposov 43, NGC 1348, NGC 2112, NGC 4337, SAI 24, and SAI 94) with the assumption that all members N are scattering around a mean absolute magnitude in a Gaussian distribution. Our numerical obtained results are in good agreement with previously calculated values. In the second part of the paper, we have calculated the luminosity function of Hyades open cluster by Salpeter’s normalized function Ψ( M V ) due to frequency distribution function Φ( M V ), on this way, we have got a very significant relationship between them with absolute magnitudes M V (i.e., the linear correlation coefficient ∼ 0.995), and the error analysis are also given.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43920679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.31577/caosp.2021.51.3.257
A. Shugarov
A small dedicated UV telescope with a modern detector can obtain a lot of new information to study comets in the UV range, which is inaccessible for ground telescopes. We discuss the latest trends in UV-optimized CMOS and CCD detectors that can improve the efficiency of a small aperture (20 cm) space burn UV telescope. The improvements of classical CCD are moving toward improving quantum efficiency in UV, development of the new anti-reflection coatings and multilayer UV filters with enhanced red leak suppression. CMOS with a very small pixel (3-5μm) of more than 20 Mpixel format allows to improve sampling and to increase the price/performance ratio of a small aperture telescope.
{"title":"Modern UV detectors for small aperture space mission to study comets","authors":"A. Shugarov","doi":"10.31577/caosp.2021.51.3.257","DOIUrl":"https://doi.org/10.31577/caosp.2021.51.3.257","url":null,"abstract":"A small dedicated UV telescope with a modern detector can obtain a lot of new information to study comets in the UV range, which is inaccessible for ground telescopes. We discuss the latest trends in UV-optimized CMOS and CCD detectors that can improve the efficiency of a small aperture (20 cm) space burn UV telescope. The improvements of classical CCD are moving toward improving quantum efficiency in UV, development of the new anti-reflection coatings and multilayer UV filters with enhanced red leak suppression. CMOS with a very small pixel (3-5μm) of more than 20 Mpixel format allows to improve sampling and to increase the price/performance ratio of a small aperture telescope.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49311550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.31577/caosp.2021.51.3.221
E. Kanev, S. Sichevsky, V. Shmagin, M. Sachkov
In this article we consider the prospects of research on comets and exoplanets using instruments onboard the WSO-UV mission. Ultraviolet spectroscopy at 115-310 nm is a powerful tool for studying comets, since this range of the electromagnetic spectrum contains most of the resonance lines of atoms, molecules and ions. The spectrographs on board the WSO-UV spacecraft will become one of the most important instruments for spectral studies of comets and exoplanets after 2025.
{"title":"Potentials of spectroscopic studies of comets and exoplanets with WSO-UV mission","authors":"E. Kanev, S. Sichevsky, V. Shmagin, M. Sachkov","doi":"10.31577/caosp.2021.51.3.221","DOIUrl":"https://doi.org/10.31577/caosp.2021.51.3.221","url":null,"abstract":"In this article we consider the prospects of research on comets and exoplanets using instruments onboard the WSO-UV mission. Ultraviolet spectroscopy at 115-310 nm is a powerful tool for studying comets, since this range of the electromagnetic spectrum contains most of the resonance lines of atoms, molecules and ions. The spectrographs on board the WSO-UV spacecraft will become one of the most important instruments for spectral studies of comets and exoplanets after 2025.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45277202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.31577/caosp.2021.51.3.207
S. Kalabanov, D. Korotyshkin, R. Ishmuratov, O. Sherstykov, F. Valiullin
The initial results of a new cycle (since 2016) of meteor observations in Kazan (56◦N 49◦E) which is associated with equipping of Kazan Federal University (KFU) with the new meteor radar SKiYMET are given. Simultaneously with the processing of experimental data using the built-in (native) software SKiYMET, the processing was performed using the new software developed in KFU. A comparative analysis showed a significant increase in the number of registrations due to the processing of meteors that are weaker with signal-tonoise ratio. The seasonal and daily dependencies of the meteor number for the period 2016-2019 are given. The obtained distributions of entry meteor speeds and their dependencies by seasons and heights of meteor trails are separately considered. The method of data processing for obtaining coordinates of meteor shower radiants in the equatorial coordinate system is described. The results of observations of the Geminids, Eta Aquariids, Arietids, April Lyrids, Northern and Southern Daytime Omega-Cetids, Daytime Lambda Taurids and Daytime Arietids meteor showers are presented.
{"title":"Observations of meteor showers with the meteor radar of KFU","authors":"S. Kalabanov, D. Korotyshkin, R. Ishmuratov, O. Sherstykov, F. Valiullin","doi":"10.31577/caosp.2021.51.3.207","DOIUrl":"https://doi.org/10.31577/caosp.2021.51.3.207","url":null,"abstract":"The initial results of a new cycle (since 2016) of meteor observations in Kazan (56◦N 49◦E) which is associated with equipping of Kazan Federal University (KFU) with the new meteor radar SKiYMET are given. Simultaneously with the processing of experimental data using the built-in (native) software SKiYMET, the processing was performed using the new software developed in KFU. A comparative analysis showed a significant increase in the number of registrations due to the processing of meteors that are weaker with signal-tonoise ratio. The seasonal and daily dependencies of the meteor number for the period 2016-2019 are given. The obtained distributions of entry meteor speeds and their dependencies by seasons and heights of meteor trails are separately considered. The method of data processing for obtaining coordinates of meteor shower radiants in the equatorial coordinate system is described. The results of observations of the Geminids, Eta Aquariids, Arietids, April Lyrids, Northern and Southern Daytime Omega-Cetids, Daytime Lambda Taurids and Daytime Arietids meteor showers are presented.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49341353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.31577/caosp.2021.51.3.241
E. Podobnaya, O. Popova, D. Glazachev
Exploration of small craters and craters clusters on Mars allows one to study meteoroid fragmentation details that cannot be detected in terrestrial conditions. It was suggested earlier that the description of a cluster with a scattering ellipse allows one to estimate the meteoroids’ trajectory, which is connected with orbital parameters of the impactor. Independent construction of scattering ellipses and comparison with crater ejecta demonstrate the accuracy and find out some problems of this approach.
{"title":"Trajectory estimation for fresh impacts on Mars","authors":"E. Podobnaya, O. Popova, D. Glazachev","doi":"10.31577/caosp.2021.51.3.241","DOIUrl":"https://doi.org/10.31577/caosp.2021.51.3.241","url":null,"abstract":"Exploration of small craters and craters clusters on Mars allows one to study meteoroid fragmentation details that cannot be detected in terrestrial conditions. It was suggested earlier that the description of a cluster with a scattering ellipse allows one to estimate the meteoroids’ trajectory, which is connected with orbital parameters of the impactor. Independent construction of scattering ellipses and comparison with crater ejecta demonstrate the accuracy and find out some problems of this approach.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48654129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.31577/caosp.2021.51.3.270
M. Sizova, A. Tutukov, S. Vereshchagin
One of the consequences of the evolutionary process of the planetary system is the appearance of comets, asteroids, and even planets (ACP) unbound to their parent star. These small bodies are scattered into interstellar space, orbit the Galactic Center and expand along the star orbit with time. The formed structure resembles a spear in its shape. Similar ACP spears have all stars with planetary systems in the Galaxy. Since such stars are part of the open clusters population, they scatter and form the ACPS spears. In this paper, we performed numerical modeling of the ACP and ASPC spears and estimated their parameters, such as length, width, and time of formation.
{"title":"Stellar comet spear","authors":"M. Sizova, A. Tutukov, S. Vereshchagin","doi":"10.31577/caosp.2021.51.3.270","DOIUrl":"https://doi.org/10.31577/caosp.2021.51.3.270","url":null,"abstract":"One of the consequences of the evolutionary process of the planetary system is the appearance of comets, asteroids, and even planets (ACP) unbound to their parent star. These small bodies are scattered into interstellar space, orbit the Galactic Center and expand along the star orbit with time. The formed structure resembles a spear in its shape. Similar ACP spears have all stars with planetary systems in the Galaxy. Since such stars are part of the open clusters population, they scatter and form the ACPS spears. In this paper, we performed numerical modeling of the ACP and ASPC spears and estimated their parameters, such as length, width, and time of formation.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70009902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.31577/caosp.2021.51.3.249
M. Sachkov, A. Shugarov, V. Shmagin, A. Kartashova
We present the concept of a small-aperture 20 cm wide field UV telescope for a long term detailing study of comets in UV range. Because of the small size and autonomous repointing system, the proposed telescope can be installed on various satellites as an auxiliary instrument. It also can be used on the future International Lunar Research station (ILRS). The main goal of the mission is the long term detailed study of comets and other minor bodies in the Solar System. We briefly discuss variants of the optical schemes, methods of pointing the telescope, scientific filters and modern CMOS detectors. A small dedicated UV telescope with a modern detector will obtain a lot of new information to study comets in the UV range.
{"title":"Approach to build a dedicated space born small aperture UV telescope for the long term study of comets (Comet-UV project)","authors":"M. Sachkov, A. Shugarov, V. Shmagin, A. Kartashova","doi":"10.31577/caosp.2021.51.3.249","DOIUrl":"https://doi.org/10.31577/caosp.2021.51.3.249","url":null,"abstract":"We present the concept of a small-aperture 20 cm wide field UV telescope for a long term detailing study of comets in UV range. Because of the small size and autonomous repointing system, the proposed telescope can be installed on various satellites as an auxiliary instrument. It also can be used on the future International Lunar Research station (ILRS). The main goal of the mission is the long term detailed study of comets and other minor bodies in the Solar System. We briefly discuss variants of the optical schemes, methods of pointing the telescope, scientific filters and modern CMOS detectors. A small dedicated UV telescope with a modern detector will obtain a lot of new information to study comets in the UV range.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48922946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.31577/caosp.2021.51.3.280
M. Ibrahimov, D. Bisikalo, A. Fateeva, R. Mata, O. Pons
Article reports about prospects to observe comets and asteroids using Russian-Cuban Observatory (RCO). In 2021, RCO wide-field 20cm robotic telescope was put into operation. The telescope has 20 cm aperture, 3.5x3.5 degree field of view and FLI PL16803 4K CCD camera with a set of UBV RI photometric filters. Telescope itself will be used as a multi-task networking observational tool. Using this Cuban telescope with telescopes located in Russia makes it possible to conduct quasi-day-and-night monitoring of comets and asteroids on an arc of more than 200 degrees.
{"title":"Prospects to observe comets and asteroids using Russian-Cuban Observatory","authors":"M. Ibrahimov, D. Bisikalo, A. Fateeva, R. Mata, O. Pons","doi":"10.31577/caosp.2021.51.3.280","DOIUrl":"https://doi.org/10.31577/caosp.2021.51.3.280","url":null,"abstract":"Article reports about prospects to observe comets and asteroids using Russian-Cuban Observatory (RCO). In 2021, RCO wide-field 20cm robotic telescope was put into operation. The telescope has 20 cm aperture, 3.5x3.5 degree field of view and FLI PL16803 4K CCD camera with a set of UBV RI photometric filters. Telescope itself will be used as a multi-task networking observational tool. Using this Cuban telescope with telescopes located in Russia makes it possible to conduct quasi-day-and-night monitoring of comets and asteroids on an arc of more than 200 degrees.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48741770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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