Activity of BL Lacertae during 1997-2005: Long-Term and Intraday Variability Kurtanidze, O. M. ; Nikolashvili, M. G. ; Chanturiya, S. M. ; Kimeridze, G. N. ; Sigua, L. A. ; Kapanadze, B. Z. ; Ivanidze, R. Z. ; Jimsheleishvili, G. N. ; Ograpishvili, N. B. ; Zarqua, D. G. Abstract Publication: The X-ray Universe 2005 Pub Date: January 2006 Bibcode: 2006ESASP.604..635K