Simultaneous [ITAL]UBVRI[/ITAL] Light Curves of the Seyfert Galaxy NGC 4151 during the Extraordinary Brightening from 1989 to 1996
The Astronomical Journal1999Vol. 117(5), pp. 2177–2184
Abstract
We present observations of the nuclear region of the Seyfert galaxy NGC 4151, obtained with the 1.25 m telescope at the Crimean Astrophysical Observatory. On 96 nights during eight observational runs between 1989 February 11 and 1996 June 14, we performed over 1500 simultaneous measurements, using the 20'' diameter aperture, in each spectral band of the Johnson UBVRI system. Estimated single-measurement accuracy is greater than 0.01 mag.
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