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    AuthorBreslin, A. C. (2)Buckley, J. H. (2)Catanese, M. (2)Cawley, M. F. (2)Fegan, D. J. (2)... View MoreSubject
    emission (3)
    active galaxy markarian-421 (2)gamma rays : observations (2)bl lacertae objects : individual (markarian 421) (1)bl lacertae objects : individual (markarian 501) (1)... View MoreDate Issued
    1999 (3)
    Type
    Article (3)

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    The flux variability of markarian 501 in very high energy gamma rays 

    Quinn, J.; Bond, I. H.; Boyle, P. J.; Bradbury, S. M.; Breslin, A. C.; Buckley, J. H.; Burdett, A. M.; Gordo, J. Bussons; Carter‐Lewis, D. A.; Catanese, M.; Cawley, M. F.; Fegan, D. J.; Finley, J. P.; Gaidos, J. A.; Hall, T.; Hillas, A. M.; Krennrich, F.; Lamb, R. C.; Lessard, R. W.; Masterson, C.; McEnery, J. E.; Moriarty, P.; Rodgers, A. J.; Rose, H. J.; Samuelson, F. W.; Sembroski, G. H.; Srinivasan, R.; Vassiliev, V. V.; Weekes, T. C. (IOP Publishing, 1999-06-20)
    The BL Lacertae object Markarian 501 was identified as a source of gamma-ray emission at the Whipple Observatory in 1995 March. Here we present a flux variability analysis on several timescales of the 233 hr data set ...
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    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 ...
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    Kinematic interpretation of the centaurus a absorption‐line system 

    Eckart, A.; Wild, W.; Ageorges, N. (IOP Publishing, 1999-05-10)
    The location of the gas responsible for the absorption-line system toward the nucleus of Centaurus A is a puzzle. It is generally accepted that the line features close to the systemic velocity originate in the disk. The ...
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