Skip to content

Opening book details…

Can I read An X-ray flaring event and a variable soft X-ray excess in the Seyfert LCRS B040659.9-385922 as detected with eROSITA on EtoBox?

An X-ray flaring event and a variable soft X-ray excess in the Seyfert LCRS B040659.9-385922 as detected with eROSITA by Krishnan, S.; Markowitz, A. G.; Krumpe, M.; Homan, D.; Brogan, R.; Haemmerich, S.; Gromadzki, M.; Saha, T.; Schramm, M.; Reichart, D. E.; Winkler, H.; Waddell, S.; Wilms, J.; Rau, A.; Liu, Z.; Grotova, I. is a scholarly article available to read on EtoBox.

What is An X-ray flaring event and a variable soft X-ray excess in the Seyfert LCRS B040659.9-385922 as detected with eROSITA about?

Extreme continuum variability in AGNs can indicate extreme changes in accretion flows onto supermassive black holes. We explore the multiwavelength nature of a continuum flare in the Seyfert LCRS B040659.9$-$385922. The all-sky X-ray surveys conducted by the eROSITA showed that its X-ray flux increased by a factor of roughly five over six months, and concurrent optical photometric monitoring with the ATLAS showed a simultaneous increase. We triggered a multiwavelength follow-up monitoring program (XMM, NICER; optical spectroscopy) to study the evolution of the accretion disk, broad-line region, and X-ray corona. During the campaign, X-ray and optical continuum flux subsided over roughly six months. We detected a soft X-ray excess near the flare peak and after it subsided, both exhibiting a power-law (nonthermal) behavior. We modeled the broadband optical/UV/X-ray spectral energy distribution at both the flare peak and post-flare times with the AGNSED model, incorporating thermal disk emission into the optical/UV and warm thermal Comptonization in the soft X-rays. Additionally, we find that the broad Heii $\lambda$4686 emission line fades significantly as the optical/UV/X-ray contin

Author
Krishnan, S.; Markowitz, A. G.; Krumpe, M.; Homan, D.; Brogan, R.; Haemmerich, S.; Gromadzki, M.; Saha, T.; Schramm, M.; Reichart, D. E.; Winkler, H.; Waddell, S.; Wilms, J.; Rau, A.; Liu, Z.; Grotova, I.
Published
2024
Language
EN

More by Krishnan, S.; Markowitz, A. G.; Krumpe, M.; Homan, D.; Brogan, R.; Haemmerich, S.; Gromadzki, M.; Saha, T.; Schramm, M.; Reichart, D. E.; Winkler, H.; Waddell, S.; Wilms, J.; Rau, A.; Liu, Z.; Grotova, I.

Browse all works by Krishnan, S.; Markowitz, A. G.; Krumpe, M.; Homan, D.; Brogan, R.; Haemmerich, S.; Gromadzki, M.; Saha, T.; Schramm, M.; Reichart, D. E.; Winkler, H.; Waddell, S.; Wilms, J.; Rau, A.; Liu, Z.; Grotova, I.