The Redshift of the X-ray Selected BL Lacertae Object H0414+009
Abstract
The x-ray selected BL Lac object H0414+004 has a redshift of 0.287, measured from the starlight of its host galaxy. The optical spectrum is well described by the sum of a standard elliptical galaxy plus a relatively flat power law (α~0.3). The galaxy contributes ~40% of the light in the spectrum in the rest-frame V band, and is one of the most luminous galaxies known (My - - 24). The properties of H0414 + 009 are similar in all respects to a previously studied object, 1E 1415+259 at ζ=0.237. If x- ray selected BL Lacs continue to be found in such bright galaxies, then the prospects of studying their luminosity function and evolution are considerably enhanced. There is also possible evidence for intrinsic x-ray absorption by a warm medium, as has been found in several other BL Lacs.
- Publication:
-
The Astronomical Journal
- Pub Date:
- March 1991
- DOI:
- 10.1086/115725
- Bibcode:
- 1991AJ....101..818H
- Keywords:
-
- Bl Lacertae Objects;
- Red Shift;
- Spectrum Analysis;
- X Ray Spectra;
- Elliptical Galaxies;
- Interstellar Extinction;
- Stellar Luminosity;
- Visible Spectrum;
- Astrophysics;
- BL LACERTAE OBJECTS