Bryan Rithesh Miranda, V. H. Doddamani, P. Vedavathi
{"title":"Long Term UV Continuum and Line Variability in NGC 1275","authors":"Bryan Rithesh Miranda, V. H. Doddamani, P. Vedavathi","doi":"10.12723/MJS.56.4","DOIUrl":null,"url":null,"abstract":"In this paper, we present our results for the first time on long term emission-line and continuum variability studies using the International Ultraviolet Explorer’s final archive of UV spectroscopic data obtained in the wavelength region from 1150 A to 3200 A for NGC 1275, a dust dominated BL Lac characterized by the Rmax and F-variance parameter. The UV continuum flux variability analysis presented in this paper covers more number of emission-line free continuum windows in the UV region centred at 1710 A, 1800 A, 2625 A, 2875 A & 3025 A. We have obtained a higher value of Fvar ~ 45 % at 1710 A and a lower value of ~ 30 % at 1800 A for the IUE's observational period of 1978 - 1989. The Lyα, C IV, C III] and Mg II emission lines have been observed as weaker line features on fewer occasions intermittently.","PeriodicalId":18050,"journal":{"name":"Mapana Journal of Sciences","volume":"21 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mapana Journal of Sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.12723/MJS.56.4","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, we present our results for the first time on long term emission-line and continuum variability studies using the International Ultraviolet Explorer’s final archive of UV spectroscopic data obtained in the wavelength region from 1150 A to 3200 A for NGC 1275, a dust dominated BL Lac characterized by the Rmax and F-variance parameter. The UV continuum flux variability analysis presented in this paper covers more number of emission-line free continuum windows in the UV region centred at 1710 A, 1800 A, 2625 A, 2875 A & 3025 A. We have obtained a higher value of Fvar ~ 45 % at 1710 A and a lower value of ~ 30 % at 1800 A for the IUE's observational period of 1978 - 1989. The Lyα, C IV, C III] and Mg II emission lines have been observed as weaker line features on fewer occasions intermittently.
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