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Effects of the variability of the nucleus of NGC 1275 on X-ray observations of the surrounding intracluster medium

Fabian, A. C.; Pinto, C.; Russell, H. R. +2 more

The active galaxy NGC 1275 lies at the centre of the Perseus cluster of galaxies, which is the X-ray brightest cluster in the Sky. The nucleus shows large variability over the past few decades. We compile a light curve of its X-ray emission covering about 40 years and show that the bright phase around 1980 explains why the inner X-ray bubbles were…