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Hubble Space Telescope observations of the BL Lac object PKS 1413+135 : the host galaxy revealed.

Abraham, R. G.; McHardy, I. M.; Crawford, C. S. +1 more

In an earlier paper, we showed that the BL Lac object PKS 1413 + 135 appears to lie in a disc-dominated galaxy with colours closer to those of an elliptical than a spiral galaxy. Subsequently, a large neutral hydrogen absorption feature was found at the optical redshift of the proposed host galaxy together with a substantial absorbing column in th…

An unusual high-redshift object discovered with the Hubble Space Telescope : peculiar starburst galaxy or new gravitational lens?

Glazebrook, K.; Griffiths, R.; Ellis, R. +2 more

We report the discovery of an object with a very peculiar structure, using observations from the refurbished Hubble Space Telescope (HST) as part of the Medium-Deep Survey project. The object includes four compact blue components arranged around an extended red component, with mutual separations of <1 arcsec. Using a ground-based spectrum as an…