Simultaneous Multiwavelength Observations of Gamma-Emitting Blazars

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Session 19 -- Multiwavelength AGN Studies
Display presentation, Monday, 9, 1995, 9:20am - 6:30pm

[19.07] Simultaneous Multiwavelength Observations of Gamma-Emitting Blazars

R.C. Hartman, D.L. Bertsch, C.E. Fichtel, S.D. Hunter, D.J. Thompson (NASA/GSFC), J.A. Esposito, R. Mukherjee, P. Sreekumar (GSFC/USRA), C. von Montigny (GSFC/NRC), D.A. Kniffen (Hampden-Sydney C.), P.F. Michelson, Y.C. Lin, P.L. Nolan, J.M. Fierro, T.D. Willis (Stanford U.), G. Kanbach, H. Mayer-Hasselwander, V. Sch\"{o}nfelder (MPE), J.D. Kurfess, W.N. Johnson (NRL), M. Kafatos (George Mason U.), A.P. Marscher, E.M. Moore, M. Georganopoulos (Boston U.), E.I. Robson (JAC), J.A. Stevens (U. Central Lancashire), W.K. Gear (Royal Obs. Edinburgh), I.M. McHardy (U. Southampton), H. Ter\"{a}sranta, M. Tornikoski (Metsahovi RRS), L.O. Takalo, A. Sillanp\"{a} \"{a} (Tuorla Obs.), A.C. Sadun (Agnes Scott C.), J.R. Webb (Florida Int. U.), M.F. Aller, H.D. Aller, P.A. Hughes (U.MI), A.D. Nair (U.FL), M. Malkan (UCLA), A.V. Filippenko (UC Berkeley), S. Wagner, A. Heines (Heidelberg), J.R. Mattox (U.MD/USRA), A.E. Wehrle (IPAC/Caltech), A. Zook (Pomona C.)

During Phase 3 of the Compton Gamma Ray Observatory Mission, the EGRET Instrument Team has worked with a large collaboration of observers at other frequencies to obtain multiwavelength coverage simultaneous with EGRET observations of a substantial number of blazars, with emphasis on those which had been detected previously by EGRET at energies $>$100 MeV. The goal of this program was twofold: to search for correlated time variations in different frequency bands, and to obtain simultaneous spectra from the GHz radio range to GeV gamma-ray energies. A sample of early results on both time variations and spectra will be presented.

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