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PKS 2155-304

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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. {{cite web}}: |first1= missing |last1= (help); Missing or empty |title= (help)CS1 maint: numeric names: authors list (link)


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