CGRO observations of the MeV-bright blazars PKS 0208-512 and GRO J0516-609
PKS 0208-512 and GRO J0516-609 have recently been identified as the most prominent members of a possible sub-class of blazar-type AGNs that are exceptionally bright at MeV energies ("MeV-blazars"). We summarize here the findings for GRO J0516-609 and present updated analysis results for PKS 0208-512 based on simultaneous observations with EGRET and COMPTEL. Significant time variability is clearly seen in the PKS 0208-512 spectrum at high as well as medium γ-ray energies. We present spectra suggesting a distinct spectral upturn from the EGRET energy regime into the COMPTEL regime. The presence of a pronounced spectral component at about 1-10 MeV appears now well established for these sources.
Publication Source (Journal or Book title)
Astronomy and Astrophysics Supplement Series
Blom, J., Bennett, K., Bloemen, H., Collmar, W., Diehl, R., Hermsen, W., Lyudin, A., Lichti, G., Morris, D., Schönfelder, V., Stacy, J., Steinle, H., Strong, A., Williams, O., & Winkler, C. (1996). CGRO observations of the MeV-bright blazars PKS 0208-512 and GRO J0516-609. Astronomy and Astrophysics Supplement Series, 120 (4), 507-510. Retrieved from https://digitalcommons.lsu.edu/physics_astronomy_pubs/5186