PKS 2155-304

Image of PKS 2155-304 obtained in R band at ESO-NTT.

PKS 2155-304 is one of the brightest active galaxies in the sky.

It is a strong emitter from radio to high energy frequencies. PKS 2155-305 is at redshift z = 0.116 (Falomo, Pesce & Treves 1993) and it is one of the brightest and most studied BL Lacs and is often considered the prototype of X-ray selected BL Lacs.[1]

References

  1. ↑ http://arxiv.org/abs/0706.0797. |first1= missing |last1= in Authors list (help); Missing or empty |title= (help)


This article is issued from Wikipedia - version of the Monday, January 25, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.