77 citations · 512 across the 23 of their papers we have counts for
6 papers · 1 filter
A microlensing measurement of the size of the broad emission line region in the lensed QSO 2237+0305
Randall B. Wayth, Matthew O'Dowd, Rachel L. Webster
We present spatially resolved spectroscopic images of the gravitationally lensed QSO 2237+0305 taken with the GMOS Integral Field Unit (IFU) on the Gemini North telescope. These ob…
Host Galaxy Evolution in Radio-Loud AGN
Matthew O'Dowd, C. Megan Urry
We investigate the luminosity evolution of the host galaxies of radio-loud AGN through Hubble Space Telescope imaging of 72 BL Lac objects, including new STIS imaging of nine z > 0…
H1517+656: the Birth of a BL Lac Object?
Matthew O'Dowd, C. Megan Urry, Riccardo Scarpa +2
H1517+656 is an unusual source, even for a BL Lac object. It is one of the most luminous BL Lacs known, with extreme emission properties at radio, optical, and X-ray frequencies. F…
The HST Survey of BL~Lacertae Objects. IV. Infrared Imaging of Host Galaxies
Riccardo Scarpa, C. Megan Urry, Paolo Padovani +2
The HST NICMOS Camera 2 was used for H-band imaging of 12 BL Lacertae objects taken from the larger sample observed with the WFPC2 in the R band (Urry et al. 2000; Scarpa et al. 20…
HST Observations of BL Lacertae Environments
J. E. Pesce, C. M. Urry, M. O'Dowd +3
We analyze images of BL Lacertae objects obtained with the {\it Hubble Space Telescope} WFPC2 and the F814W filter. The nine objects cover a redshift range of 0.19 to 0.997. The re…
The HST Survey of BL Lac Objects: Gravitational Lens Candidates and Other Unusual Sources
R. Scarpa, C. M. Urry, R. Falomo +4
We present HST observations of seven unusual objects from the HST ``snapshot survey'' of BL Lac objects, of which four are gravitational lens candidates. In three cases a double po…