Multi-wavelength study of Mrk 421 during a TeV flare
| Autor: | Daniela Dorner, Adrian Biland, Adelina Kalenski, Dominik Elsaesser, M. Noethe, Laura Eisenberger, Bernd Schleicher, A. Arbet-Engels, R. Iotov, Thomas Dauser, Dominik Baack, P. Thalhammer, V. Sliusar, A. Gokus, Alexander Kraus, M. Balbo, D. Hildebrand, Karl Mannheim, Florian Eppel, A. Paravac, J. Buss, J. Wilms, K. Leiter, D. Neise, Jonas Hessdoerfer, Michael Kreter, A. Kreikenbohm, M. Langejahn, I. Kreykenbohm, Matthias Kadler, R. Walter, Thomas Bretz, Wolfgang Rhode, Alison Mitchell |
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| Rok vydání: | 2021 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Flux Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Light curve Monitoring program law.invention Telescope Crab Nebula law Observatory Astrophysics - High Energy Astrophysical Phenomena Blazar Flare |
| Zdroj: | Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021). |
| DOI: | 10.22323/1.395.0869 |
| Popis: | The blazar Mrk 421 shows frequent, short flares in the TeV energy regime. Due to the fast nature of such episodes, we often fail to obtain sufficient simultaneous information about flux variations in several energy bands. To overcome this lack of multi-wavelength (MWL) coverage, especially for the pre- and post-flare periods, we have set up a monitoring program with the FACT telescope (TeV energies) and the Neil Gehrels Swift Observatory (X-rays). On 2019 June 9, Mrk 421 showed a TeV outburst reaching a flux level of more than two times the flux of the Crab Nebula at TeV energies. We acquired simultaneous data in the X-rays with additional observations by XMM-Newton and INTEGRAL. For the first time, we can study a TeV blazar in outburst taking advantage of highly sensitive X-ray data from XMM-Newton and INTEGRAL combined. Our dataset is complemented by pointed radio observations by Effelsberg at GHz frequencies. We present our first results, including the {\gamma}-ray and X-ray light curves, a timing analysis of the X-ray data obtained with XMM-Newton , as well as the radio spectra before, during and after the flare. Comment: 8 pages, 4 figures; Proceedings of the 37th International Cosmic Ray Conference (ICRC2021). 12-23 July, 2021. Berlin, Germany. Online at https://pos.sissa.it/395/ |
| Databáze: | OpenAIRE |
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