@article {22729,
	title = {Modeling the TeV Gamma-Ray Spectra of Two Low-Redshift Active Galactic Nuclei: Markarian 501 and Markarian 421},
	volume = {597},
	year = {2003},
	month = {2003/11/1},
	pages = {851 - 859},
	abstract = {We discuss the results of modeling the TeV γ-ray spectra of two active galactic nuclei, Mrk 501 and Mrk 421, that have almost the same redshifts: z=0.031 and 0.034, respectively. The effect of intergalactic γ-ray absorption is treated as an uncertainty in the measurement of the intrinsic spectrum. Although the objects differ, we obtain satisfactory fits for both of them in a synchrotron self-Compton scenario. Compared to previous models, our fits are characterized by higher values of the Doppler factor (δ\&gt;=50) and an electron injection spectrum extending to higher energies (γ<SUB>max</SUB>\&gt;=1.5{\texttimes}10<SUP>5</SUP>). In the case of Mrk 421, the observed difference in spectral slope in X-rays and TeV γ-rays between the high and low states can be explained as a variation of a single parameter-the maximum energy γ<SUB>max</SUB>mc<SUP>2</SUP> at which electrons are injected.},
	keywords = {Astrophysics, galaxies: active, Galaxies: BL Lacertae Objects: Individual: Name: Markarian 421, Galaxies: BL Lacertae Objects: Individual: Name: Markarian 501, Gamma Rays: Observations},
	isbn = {0004-637X},
	url = {https://ui.adsabs.harvard.edu/abs/2003ApJ...597..851K},
	author = {Konopelko, A. and Mastichiadis, A. and Kirk, J. and de Jager, O. C. and Stecker, F. W.}
}
