most citedX-ray spectral variability in PG1535+547: the changing-look of a 'soft X-ray weak' AGN

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X-ray spectral variability in PG1535+547: the changing-look of a 'soft X-ray weak' AGN

L. Ballo, M. Giustini, N. Schartel +5

PG1535+547 is a bright NLS1 galaxy, whose high energy emission shows strong variability in shape and flux. ROSAT data classified it as soft X-ray weak QSO (objects whose X-ray-to-o…