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References
- ↑ "PKSCAT90 - Parkes Southern Radio Source Catalog, Version 1.01". heasarc.gsfc.nasa.gov.
- ↑ "PKSCAT90 - The Southern RadioSource Database". www.parkes.atnf.csiro.au.
- ↑ https://chandra.harvard.edu/photo/1999/0064/index.html
- ↑ https://heasarc.gsfc.nasa.gov/docs/rosat/gallery/snr_pks1209.html
- ↑ Liuzzo, E.; Falomo, R.; Treves, A.; Donato, D.; Sambruna, M.; Arcidiacono, C.; Giovannini, G.; Farinato, J.; Moretti, A.; Ragazzoni, R.; Diolaiti, E.; Lombini, M.; Brast, R.; Donaldson, R.; Kolb, J.; Marchetti, E.; Tordo, S. (April 1, 2011). "The jet of the BL Lacertae object PKS 2201+044: MAD near-IR adaptive optics observations and comparison with optical, radio and X-ray data". Astronomy & Astrophysics. 528: A34. doi: 10.1051/0004-6361/201015570 – via www.aanda.org.
- ↑ https://arxiv.org/abs/astro-ph/9504076