OSSE Observations of the Bright Seyfert 1 Galaxy IC 4329A: Erratum

Astronomy and Astrophysics – Astronomy

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Errata, Addenda

Scientific paper

In the Letter "OSSE Observations of the Bright Seyfert 1 Galaxy IC 4329A" by A. C. Fabian, K. Nandra, A. Celotti, M. J. Rees, J. E. Grove, and W. N. Johnson (ApJ, 416, L57 [1993]), there was a normalization error of a factor of 4 in the OSSE detector response matrix used. Therefore, the OSSE spectrum shown in Figure 4 should be increased by this factor relative to the Ginga data. This weakens the evidence for a spectral break, which must now have an e-folding energy greater than 350 keV. A paper discussing the reanalysis of the data, and the theoretical implications, is in preparation.

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