Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21912703m&link_type=abstract
American Astronomical Society, AAS Meeting #219, #127.03
Astronomy and Astrophysics
Astronomy
Scientific paper
Owing to its all-sky monitoring capability, Fermi LAT continues to provide us with unprecedented sampling of gamma-ray flux from celestial objects. This is particularly valuable for the highly variable jet-dominated active galaxies, where Fermi LAT is sensitive in the spectral regime often responsible for the largest fraction of total radiated power. Since those objects radiate in all accessible energy regimes, major breakthroughs have been gleaned from time-resolved multi-band observations including the gamma-rays but also radio, IR, optical, UV and X-ray bands. In this presentation I will cover the results of temporal studies of blazars with Fermi LAT - including the analysis of gamma-ray time series via studies of Power Density Spectra and duty cycles of flaring activity - but also variability properties across the entire electromagnetic spectrum. This will highlight the time-resolved optical polarization properties as well as X-ray measurements simultaneous with Fermi LAT, providing the constraints on the emission processes as well as the structure, content, and geometry of AGN jets, and their connection to the central black hole.
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