Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-10-10
Astron.Astrophys.462:29-41,2007
Astronomy and Astrophysics
Astrophysics
Accepted in A&A, 16 pages, 14 figures
Scientific paper
10.1051/0004-6361:20066134
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.
Dubus Guillaume
Giebels Berrie
Khelifi Bruno
No associations
LandOfFree
Unveiling the X-ray/TeV engine in Mkn 421 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Unveiling the X-ray/TeV engine in Mkn 421, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unveiling the X-ray/TeV engine in Mkn 421 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-437147