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|Paper IPM / Astronomy / 11625||
Blazars vary at all wavelengths over a variety of timescales. Various models have been proposed to explain blazar variability, however, the mechanism responsible for variability is not conclusively understood. One factor which can discriminate among the various variability models is that of colour (spectral index) variations of blazars. By this one may be able to better understand the mechanism of blazar variability. It is also, currently inconclusive if all blazars have similiar spectral variability nature. We have therefore carried out quasi-simultaneous multiband monitoring of one of the brightest GeV blazar , Mrk 180, on 23 Apr 2009 at OHP observatory.
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