%0 Journal Article
%T Centaurus A: Hard X-ray and High-Energy Gamma-Ray Light Curve Correlation
%A Isak Delberth Davids
%A Markus B£¿ttcher
%A Michael Backes
%J Galaxies | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/galaxies7020044
%X Centaurus A, powered by a 55 million solar mass supermassive black hole, has been intensively monitored in all accessible wavelength ranges of the electromagnetic spectrum. However, its very-high energy gamma ( ¦Ã ) ray flux (TeV photons), obtained from H.E.S.S. is relatively faint, hampering detailed light curve analyses in the most energetic energy band. Yet, the extensive long-term light curve data from Fermi-LAT and Swift-BAT (hard X-rays) allows for cross-correlation studies. We find a hint that X-ray emission from Centaurus A precedes the ¦Ã rays by 25 ¡À 125 days. If this lag is real and related to a ¦Ã ¦Ã absorption effect in the broad-line region (BLR) around the central source, we can constrain the size of the BLR using light-travel time arguments. These are first results of extended light curve correlation studies between high-energy ¦Ã rays and X-rays from Centaurus A. View Full-Tex
%U https://www.mdpi.com/2075-4434/7/2/44