I'm reading articles about blazars, and in a discussion about models concerning Blazar SEDs (Spectral Energy Densities) there are mentions of different processes: Sychrotron scattering, inverse Compton scattering, etc.
Now concerning models for blazar emission, there are a lot of acronyms. I managed to figure out that SSC stands for "Self Synchrotron-Compton," but I have no idea what the acronyms "XC" and "BBC" stand for. And it isn't easy to google out "bbc + anything" without finding just references to... you know: http://en.wikipedia.org/wiki/BBC
Does anyone know or have a good sense of what those acronyms might stand for?