… BL Lacertae during the summer 2000 WEBT campaign and its extension (May 2000–January
2001). The core optical campaign took place simultaneously with the planned highenergy …

… BL Lac 2001 WEBT campaign. Other well-sampled periods are mid 1999 (especially the
WEBT campaigns) and of course the BL Lac Campaign 2000. The 1997 outburst still remains …

… the members of the Whole Earth Blazar Telescope (WEBT) collaboration in the period
1994–2002, especially during the WEBT campaigns of 1999, 2000–2001, and 2001–2002. Radio …

… BL Lacertae (BL Lac) was the target of an extensive multiwavelength monitoring campaign
in the second half of 2000. … The WEBT optical campaign achieved an unprecedented time …

… A new campaign on BL Lacertae was organized by the WEBT in the 2007-2008 observing
season, including three pointings by the XMM-Newton satellite as well as spectroscopic …

… BL Lacertae has been the target of several observing campaigns by the Whole Earth Blazar
Telescope (WEBT) collaboration and is one of the best studied blazars at all accessible …

… 31 to November 2, 2000, during an extensive multiwavelength campaign. When constructing
… 2 Multifrequency observations by the WEBT The new WEBT campaign on BL Lacertae took …

… In this new paper, we analyse the γ-ray, X-ray, UV, optical and millimetric behaviour of BL
Lacertae from the start of the GASP observations of this object, in early 2008, through the …

We present the most continuous data base of optical observations ever published on the BL
Lacertae object GC 0109+224, collected mainly by the robotic telescope of the Perugia …

… BL Lacertae, the prototype of the “BL Lac objects” blazar class, has been the target of many
campaigns by the whole earth blazar telescope (WEBT… collected by the WEBT allowed us to …