Comptel gamma-ray observations of the quasars CTA 102 and 3C 454.3 | Zendy

J. J. Blom | Zendy; H. Bloemen | Zendy; W. Hermsen | Zendy; Werner Colmar | Zendy; V. Schönfelder | Zendy; H. Steinle | Zendy; A. W. Strong | Zendy; M. McConnell | Zendy; J. G. Stacy | Zendy; K. Bennett | Zendy; C. Winkler | Zendy

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Comptel gamma-ray observations of the quasars CTA 102 and 3C 454.3

Author(s) -

J. J. Blom,

H. Bloemen,

W. Hermsen,

Werner Colmar,

V. Schönfelder,

H. Steinle,

A. W. Strong,

M. McConnell,

J. G. Stacy,

K. Bennett,

C. Winkler

Publication year - 1994

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.45665

Subject(s) - physics , astrophysics , quasar , observatory , egret , active galactic nucleus , spectral line , gamma ray , blazar , sky , flattening , astronomy , galaxy

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 the COMPTEL 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.

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