Unveiling the X-ray/TeV engine in Mkn 421
| dc.creator | Giebels, Berrie | |
| dc.creator | Dubus, Guillaume | |
| dc.creator | Khelifi, Bruno | |
| dc.date | 2006-10-10 | |
| dc.date | 2006-10-12 | |
| dc.date.accessioned | 2026-07-07T11:04:15Z | |
| dc.date.available | 2026-07-07T11:04:15Z | |
| dc.description | Simultaneous observations of Mkn 421 were taken in very high energy gamma -rays (>200 GeV, CAT experiment), X-rays (RXTE) and optical (KVA). Multi -day RXTE observations are also presented, allowing for detailed modelling of the spectral variability. Short timescale (~30')variations in VHE gamma-rays are found, correlated with X-rays but not with the optical. The X-ray spectrum hardens with flux until the photon indices saturate above a threshold flux. The fractional variability decreases from X-rays to optical as a power-law follwing E^0.24. The full spectral energy distribution is well-fitted by synchrotron self-Compton emission from cooling electrons injected with a Maxwellian distribution of characteristic energy gamma_b. Fluctuations in the injected power proportional to (gamma_b)^4 can explain the observed variability. | |
| dc.description | Accepted in A&A, 16 pages, 14 figures | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0610270 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0610270 | |
| dc.identifier | Astron.Astrophys.462:29-41,2007 | |
| dc.identifier | doi:10.1051/0004-6361:20066134 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/188829 | |
| dc.subject | Astrophysics | |
| dc.title | Unveiling the X-ray/TeV engine in Mkn 421 | |
| dc.type | text |