Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-06-28
Astronomy and Astrophysics
Astrophysics
accepted for publication in MNRAS, 5 pages with 2 Postscript figures
Scientific paper
10.1046/j.1365-8711.1999.02925.x
The BL Lacertae object PKS 1413+135 is associated with a disk dominated galaxy which heavily absorbs the BL Lac nucleus at optical and X-ray wavelengths. It has been argued whether this galaxy is actually the host galaxy of PKS 1413+135 or whether the BL Lac is a background QSO, gravitationally lensed by the apparent host galaxy. We have obtained deep high resolution H-band images of this unusual BL Lac object using the UKIRT IRCAM3. Our observations show that the BL Lac nucleus is centered within < 0.05 arcsec of the galaxy. Based on this result we assess the probability for the lensing scenario and come to the conclusion that the disk galaxy is indeed the host of PKS 1413+135. The galaxy shows peanut-shaped isophotes, suggesting the presence of a central bar which is a common feature of AGN
Lamer Georg
McHardy Ian M.
Newsam Andrew M.
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