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19932024
most citedOn characterising the variability properties of X-ray light curves from active galaxies

1.2k citations · 6.4k across the 65 of their papers we have counts for

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astro-ph1993★ 91 cited

Multiwavelength Monitoring of the BL Lac Object PKS 2155-304 I. The IUE Campaign

C. M. Urry

Daily monitoring of PKS 2155-304 with the IUE satellite throughout November 1991 has revealed dramatic, large-amplitude, rapid variations in the ultraviolet flux of this BL Lac obj…