Abstract Details
| Name: Rahul Sharma Affiliation: University of Delhi Conference ID: ASI2017_1107 Title : Spectroscopic study of the dipping behaviour of MXB 1658-298 with XMM-Newton Authors and Co-Authors : Rahul Sharma (Department of Physics & Astrophysics, University of Delhi, Delhi), Abdul Jaleel (Department of Physics & Astrophysics, University of Delhi, Delhi), Chetana Jain (Hans Raj College, University of Delhi, Delhi), Biswajit Paul (Raman Research Institute, Bangalore) and Anjan Dutta (Department of Physics & Astrophysics, University of Delhi, Delhi) Abstract Type : Poster Abstract Category : Stars,ISM and the Galaxy Abstract : MXB 1658-298 is a transient low mass X-ray binary (LMXB), which has recently undergone a phase of enhanced X-ray emission after a long period of quiescence. It has an orbital period of ~ 7.1 hours, which includes an X-ray eclipse of duration ∼ 15 minutes. The source also shows dipping and burst behaviour. Study of eclipsing and dipping LMXBs is useful to probe the structures in the accretion disk. The X-ray intensity dips observed in MXB 1658-298 are indicative of obscuration by a thickened accretion disk at the outer regions. We have carried out a detailed study of this dipping source using XMM-Newton archival data for two outbursts during 2001 and 2015. During the 2001 observation, when the source was relatively brighter, dipping region lied between ~ 0.7-0.96 orbital phase; while for 2015 observation, dipping region is narrower and it lied between ~ 0.7-0.86 orbital phase. It is observed that the dipping during 2015 observation is shallower than 2001 observation. In this work, we will discuss the results of spectral analysis of dipping as well as the persistent phase of the source. |