Browsing by Author "Samuelson, F."

Now showing items 1-3 of 3

    • Correlated variability of mkn 421 at x-ray and tev wavelengths on time scales of hours 

      Maraschi, L.; Fossati, G.; Tavecchio, F.; Chiappetti, L.; Celotti, A.; Ghisellini, G.; Grandi, P.; Pian, E.; Tagliaferri, G.; Treves, A.; Breslin, A.C.; Buckley, J.H.; Carter-Lewis, D.A.; Catanese, M.; Cawley, M.F.; Fegan, D.J.; Fegan, S.; Finley, J.; Gaidos, J.; Hall, T.; Hillas, A.M.; Krennrich, F.; Lessard, R.W.; Masterson, C.; Moriarty, P.; Quinn, J.; Rose, J.; Samuelson, F.; Weekes, T.C. (Elsevier BV, 1999-06-01)

    • Limits to quantum gravity effects on energy dependence of the speed of light from observations of tev flares in active galaxies 

      Biller, S. D.; Breslin, A. C.; Buckley, J.; Catanese, M.; Carson, M.; Carter-Lewis, D. A.; Cawley, M. F.; Fegan, D. J.; Finley, J. P.; Gaidos, J. A.; Hillas, A. M.; Krennrich, F.; Lamb, R. C.; Lessard, R.; Masterson, C.; McEnery, J. E.; McKernan, B.; Moriarty, P.; Quinn, J.; Rose, H. J.; Samuelson, F.; Sembroski, G.; Skelton, P.; Weekes, T. C. (American Physical Society (APS), 1999-09-13)
      We have used data from a TeV gamma-ray flare associated with the active galaxy Markarian 421 to place bounds on the possible energy dependence of the speed of light in the context of an effective quantum gravitational ...

    • Simultaneous x-ray and t[clc]e[/clc]v observations of a rapid flare from markarian 421 

      Maraschi, L.; Fossati, G.; Tavecchio, F.; Chiappetti, L.; Celotti, A.; Ghisellini, G.; Grandi, P.; Pian, E.; Tagliaferri, G.; Treves, A.; Breslin, A. C.; Buckley, J. H.; Carter-Lewis, D. A.; Catanese, M.; Cawley, M. F.; Fegan, D. J.; Fegan, S.; Finley, J.; Gaidos, J.; Hall, T.; Hillas, A. M.; Krennrich, F.; Lessard, R. W.; Masterson, C.; Moriarty, P.; Quinn, J.; Rose, J.; Samuelson, F.; Weekes, T. C.; Urry, C. M.; Takahashi, T. (IOP Publishing, 1999-12-01)
      Mrk 421 was observed for about 2 days with BeppoSAX in 1998 April as part of a worldwide multiwavelength campaign. A large, well-defined flare was observed in X-rays. The same flare was observed simultaneously at TeV ...