| Name: | Raj Kumar |
| Affiliation: | Bhabha Atomic Research Centre, Mumbai |
| Conference ID : | ASI2023_284 |
| Title : | Spectral behaviour during rapid flux change in Swift J1728.9-3613 using NICER and NuSTAR. |
| Authors : | Raj Kumar |
| Mode of Presentation: | Poster |
| Abstract Category : | Stars, ISM and Galaxy |
| Abstract : | Recent studies confirmed that Swift J1728.9-3613 is a Black hole X-ray binary. Hardness intensity diagram indicates that it is a high inclination source. During an outburst black hole X-ray binary undergoes a transition from hard state to soft state and soft to hard state. They exhibit a short lived intermediate state during state transition. The behavior of accretion disk during intermediate state is not well understood. We analyzed simultaneous NICER and NuSTAR observations for Swift J1728.9-3613 during the intermediate state. We observe drastic change in the flux without much change in hardness. We did the spectral analysis to see the variation in parameters as flux changes. We found that the change in flux is due to the variation in coronal behavior.
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