Speaker
Koothodil Abhijith Augustine
(Institute of Astronomy, National Tsing Hua University, Hsinchu)
Description
Using Swift Burst Alert Telescope event-mode data during Gamma Ray Burst occurrences, we conducted spectral analysis for the Crab system. From 38 good observations, which spans over a period of 18 years from 2006 to 2023, we found that the Crab's X-ray flux does not only flicker, but also significantly anti-correlates to its spectral power-law photon index. Since emission contribution of the Crab pulsar in this energy range is small, this anti-correlation is mainly about the emission of the Crab nebula. We suggest that this anti-correlation is an observational supporting evidence for the long-standing notion that the nebula emission is due to synchrotron radiation of shocked pulsar winds in the nebula.
| Section | High Energy |
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Primary author
Koothodil Abhijith Augustine
(Institute of Astronomy, National Tsing Hua University, Hsinchu)
