Another look at the BL Lacertae flux and spectral variability. Observations by GASP-WEBT, XMM-Newton, and Swift in 2008-2009

Raiteri C;Villata M;Bruschini L;Capetti A;Kurtanidze O;Larionov V;Romano P;Vercellone S;Agudo I;Aller H;Aller M;Arkharov A;Bach U;Berdyugin A;Blinov D;Bottcher M;Buemi C;Calcidese P;Carosati D;Casas R;Chen W;Coloma J;Diltz C;di Paola A;Dolci M;Efimova N;Forn#232, E;G#242;mez J;Gurwell M;Hakola A;Hovatta T;Hsiao H;Jordan B;Jorstad S;Koptelova E;Kurtanidze S;Lahteenmaki A;Larionova E;Leto P;Lindfors E;Ligustri R;Marscher A;Morozova D;Nikolashvili M;Nilsson K;Ros J;Roustazadeh P;Sadun A;Sillanpaa A;Sainio J;Takalo L;Tornikoski M;TRIGILIO, CORRADO;Troitsky I;Umana G.

2010-01-01