Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aspc..299..293h&link_type=abstract
High Energy Blazar Astronomy, ASP Conference Proceedings, Vol. 299, held 17-21 June 2002 at Tuorla Observatory, Piikkio, Finland
Astronomy and Astrophysics
Astronomy
2
Scientific paper
We present and discuss deep high-resolution images taken with the ESO-NTT as well as spectra taken with the ESO-VLT in the field of PKS 0537-441. We could neither detect the host galaxy nor a galaxy along the line-of-sight to the BL Lac as claimed from previous observations. We found 4 nearby companion galaxies which could be a splitted and magnified image of a distant background galaxy. Our VLT-spectra, however, rule out this possibility. All 4 companions have similar redshifts as the BL Lac and may (at least in part) trigger the enormous activity in this source. PKS 0537-441 might be located in a galaxy cluster as rich as Abell 1. Alternatively, the BL Lac could also be located in the outskirts of a galaxy cluster or even be projected on a large-scale structure as indicated by spectra of 30 galaxies in the field. Either lensing hypothesis (lens or being lensed) can be ruled out with high confidence by our observations.
Fried Josef W.
Heidt Jochen
Hopp Ulrich
Jäger Klaus
Nilsson Kim K.
No associations
LandOfFree
The BL Lac Object PKS 0537-441: a Lens or being Lensed? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The BL Lac Object PKS 0537-441: a Lens or being Lensed?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The BL Lac Object PKS 0537-441: a Lens or being Lensed? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1465841