The blazer‐type active galactic nuclei (AGNs) CTA 102 (QSO 2230+114) and 3C 454.3 (QSO 2251+158), located about 7° apart on the sky, were observed by the Compton Gamma Ray Observatory at four epochs in 1992. Both were detected by EGRET and here we present theCOMPTEL observations of the two quasars. These observations clearly indicate that the power‐law spectra measured by EGRET above ∼50 MeV show a flattening at lower MeV energies. A comparison with observations at other wavelengths shows that the power spectra of CTA 102 and 3C 454.3 peak at MeV energies. This behavior appears to be a common feature of AGNs radiating at gamma‐ray energies.
Space Science Center, Physics
AIP Conference Proceedings
Digital Object Identifier (DOI)
Comptel gamma‐ray observations of the quasars CTA 102 and 3C 454.3 Blom, J. J. and Bloemen, H. and Hermsen, W. and Colmar, W. and Schönfelder, V. and Steinle, H. and Strong, A. and McConnell, M. and Stacy, J. G. and Bennett, K. and Winkler, C., AIP Conference Proceedings, 304, 644-648 (1994), DOI:http://dx.doi.org/10.1063/1.45665
© 1994 American Institute of Physics