21 citations · 21 across the 1 of their papers we have counts for
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B. R. Espey, G. A. Kriss, J. H. Krolik +3
We observed the Seyfert 1 galaxy NGC 4151 on eleven occasions at 1-2 day intervals using the Berkeley spectrometer during the ORFEUS-SPAS II mission in 1996 November. The mean spec…