We presents result of CDD photometry for SU UMa dwarf nova NY Her during 6 nights in June 2017 when object was in quiescence. Light curves clearly show strong amplitude variations in a range of 0m.7-1m.1. Time series analysis revealed a period 0.07141(5) d, that we identified as the period of possible negative superhumps of NY Her.
{"title":"NY Her: possible discovery of negative superhumps","authors":"A. Sosnovskij, E. Pavlenko, N. Pit, K. Antoniuk","doi":"10.22444/IBVS.6216","DOIUrl":"https://doi.org/10.22444/IBVS.6216","url":null,"abstract":"We presents result of CDD photometry for SU UMa dwarf nova NY Her during 6 nights in June 2017 when object was in quiescence. Light curves clearly show strong amplitude variations in a range of 0m.7-1m.1. Time series analysis revealed a period 0.07141(5) d, that we identified as the period of possible negative superhumps of NY Her.","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":"6216 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2017-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42212900","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}
E. Bahar, O. Yörükoǧlu, E. M. Esmer, T. Kılıçoğlu, D. Öztürk, M. B. Doğruel, D. Ozuyar, D. Gümüş, D. D. Izci, B. Keten, C. T. Tezcan, H. V. Şenavcı, M. Yılmaz, Ö. Baştürk, S. Selam, F. Ekmekçi, B. Albayrak, S. Caliskan, A. Akcar
{"title":"Times of Minima of Some Eclipsing Binaries","authors":"E. Bahar, O. Yörükoǧlu, E. M. Esmer, T. Kılıçoğlu, D. Öztürk, M. B. Doğruel, D. Ozuyar, D. Gümüş, D. D. Izci, B. Keten, C. T. Tezcan, H. V. Şenavcı, M. Yılmaz, Ö. Baştürk, S. Selam, F. Ekmekçi, B. Albayrak, S. Caliskan, A. Akcar","doi":"10.22444/IBVS.6209","DOIUrl":"https://doi.org/10.22444/IBVS.6209","url":null,"abstract":"","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":"4027 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2017-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42276345","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}
D. Mkrtichian, K. Gunsriwiwat, D. Reichart, J. Haislip, V. Kouprianov, S. Poshyachinda
{"title":"Discovery of short-period oscillations in the mass-accreting component of TT Vel","authors":"D. Mkrtichian, K. Gunsriwiwat, D. Reichart, J. Haislip, V. Kouprianov, S. Poshyachinda","doi":"10.22444/IBVS.6238","DOIUrl":"https://doi.org/10.22444/IBVS.6238","url":null,"abstract":"","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47671495","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}
C. Cafolla, R. Mathew, A. Edge, A. M. Swinbank, G. Lansbury, R. Wilson, T. Butterley, J. Lucey, L. Hardy, S. Littlefair, V. Dhillon
The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Please consult the full DRO policy for further details.
{"title":"SS Cancri: the shortest modulation-period Blazhko RR Lyrae.","authors":"C. Cafolla, R. Mathew, A. Edge, A. M. Swinbank, G. Lansbury, R. Wilson, T. Butterley, J. Lucey, L. Hardy, S. Littlefair, V. Dhillon","doi":"10.22444/IBVS.6213","DOIUrl":"https://doi.org/10.22444/IBVS.6213","url":null,"abstract":"The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Please consult the full DRO policy for further details.","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46474450","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}
Spectroscopic results of HU Tauri that I presented in my Ph.D thesis (Parthasarathy 1979) are published in this paper. The H-alpha line of the secondary is detected. The detection of H-alpha line of the secondary is confirmed based on the high resolution Coude Reticon spectra obtained with the 2.1-m telescope of the McDonald observatory.
{"title":"Spectroscopy of bright Algol-type semi-detached close binary system HU Tauri (HR 1471)","authors":"M. Parthasarathy","doi":"10.22444/IBVS.6233","DOIUrl":"https://doi.org/10.22444/IBVS.6233","url":null,"abstract":"Spectroscopic results of HU Tauri that I presented in my Ph.D thesis (Parthasarathy 1979) are published in this paper. The H-alpha line of the secondary is detected. The detection of H-alpha line of the secondary is confirmed based on the high resolution Coude Reticon spectra obtained with the 2.1-m telescope of the McDonald observatory.","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46169838","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}
{"title":"Mass and Precession of the Disk in {zeta} Tau","authors":"E. Pollmann","doi":"10.22444/ibvs.6208","DOIUrl":"https://doi.org/10.22444/ibvs.6208","url":null,"abstract":"","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42059107","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}
Kim Chun-Hwey, Kim Hyun-woo, Park Jang-Ho, Song Mi-Hwa, Jeong Min-Ji, Kim Hye-Young
{"title":"New CCD Times of Minima of 17 Eccentric Eclipsing Binary Systems","authors":"Kim Chun-Hwey, Kim Hyun-woo, Park Jang-Ho, Song Mi-Hwa, Jeong Min-Ji, Kim Hye-Young","doi":"10.22444/IBVS.6202","DOIUrl":"https://doi.org/10.22444/IBVS.6202","url":null,"abstract":"","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44464105","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}
The variability of V2197 Cyg (NSVS 5761314, TYC 3167-1279-1), amongst many oth-ers, was discovered photographically by Margoni & Stagni (1984, hereafter M&S) who gave coordinates, magnitude ranges in B and V , finder charts for all 99 stars, elements (epoch, period), and preliminary light curves for about half the stars (but not for V2176 Cyg, their #58). Andronov et al. (1993) performed U, B, V, R , and I photometry of this and three other M&S stars; they went on in Andronov et al. (1994) to identify the system as an eclipsing variable, also giving the elements (including period = 0.46771 d) and eclipse duration. Skiff (1997) identified the M&S variables with those in the IRAS and GSC catalogues. Hoffman et al. (2008) provided an updated period, quoted 2MASS colours, and classified the system as β Lyrae. Since then, there have been a number of eclipse timings but no light curve analysis. examine difference O
{"title":"V2197 Cyg - A Semi-Detached Eclipsing Binary?","authors":"H. Robert, M. R. Russell","doi":"10.22444/IBVS.6203","DOIUrl":"https://doi.org/10.22444/IBVS.6203","url":null,"abstract":"The variability of V2197 Cyg (NSVS 5761314, TYC 3167-1279-1), amongst many oth-ers, was discovered photographically by Margoni & Stagni (1984, hereafter M&S) who gave coordinates, magnitude ranges in B and V , finder charts for all 99 stars, elements (epoch, period), and preliminary light curves for about half the stars (but not for V2176 Cyg, their #58). Andronov et al. (1993) performed U, B, V, R , and I photometry of this and three other M&S stars; they went on in Andronov et al. (1994) to identify the system as an eclipsing variable, also giving the elements (including period = 0.46771 d) and eclipse duration. Skiff (1997) identified the M&S variables with those in the IRAS and GSC catalogues. Hoffman et al. (2008) provided an updated period, quoted 2MASS colours, and classified the system as β Lyrae. Since then, there have been a number of eclipse timings but no light curve analysis. examine difference O","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":"863 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41315197","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}
{"title":"DD CMa: A New Galactic DPV of Extreme Short Period","authors":"R. Mennickent, B. Gürol","doi":"10.22444/IBVS.6207","DOIUrl":"https://doi.org/10.22444/IBVS.6207","url":null,"abstract":"","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46876040","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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