Abstract Details
| Name: Vijayakumar Doddamani Affiliation: Bangalore University, Bengaluru Conference ID: ASI2019_221 Title : Long term monitoring study of MRK 335 with IUE satellite Authors and Co-Authors : Vedavathi P and Vijayakumar H Doddamani Abstract Type : Poster Abstract Category : Extragalactic Astronomy Abstract : IUE satellite had made long term monitoring low-resolution spectroscopic observations of MRK335 from December 1983 to September 1993, a well-known seyfert1 galaxy for its UV variability. Variability monitoring of active galaxies with the UV and optical observations over nearly two decades have enabled us investigate the variability characteristics in greater details. The continuum and emission line lights curves obtained from such long monitoring observations have shown outbursts separated by local minima and the emission-line responses are slightly delayed in terms of several days. In this paper, we present the UV variability characteristics of MRK 335 as it was quasi-continuously monitored by IUE satellite from December 1983 to September, 1993. We have found the Fvar (NVA) to be 0.151, 0.132, 0.114 and 0.081 at UV continuum of 1325, 1475, 1655 and 2175 Å respectively. The Rmax values have been found to be 2.029, 1.576,1.491 and 1.237 similarly at 1325, 1475, 1655 and 2175 Å respectively. The decreasing trend of Fvar and Rmax variability parameters are similar in trend found in NGC 4151, NGC 7469 and may other low redshift active galaxies observed by IUE but over short-time scale intervals. The variability characteristic of MRK 335 appear to be similar in this trend at optical observations too. These observations suggest that the central accretion disk geometry/structure would be similar in radial direction. A more detailed discussion on the UV-variability of MRK 335 and in comparison with other IUE observations is presented this paper. |