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60 Milliarcsecond Near-Infrared Imaging of 3C 273 with Altair and Gemini
Hutchings, J. B.; Rigaut, F.; Veran, J. -P. +1 more
We report data from the commissioning run of the Altair adaptive optics instrument on Gemini North. The bright QSO 3C 273 was observed at f/32 in the H and J bands, and at f/14 with J band, using the QSO itself as guide star. Resolution of approximately 60 mas full width at half-maximum (FWHM) was achieved in H band. The data and point-spread func…
Clarification of the Nature of the Galaxy [CFC97] Cen 05
Da Costa, G. S.; Jerjen, H.; Bouchard, A.
The galaxy [CFC97] Cen 05 has in the past been considered an H I-rich dwarf galaxy in the nearby Centaurus A group. We have used Australia Telescope Compact Array observations to show that the H I associated with [CFC97] Cen 05 by Côté et al. is most likely a Galactic high-velocity cloud that is centered ~17' from the optical image of the galaxy. …
Far Ultraviolet Spectroscopic Explorer Spectroscopy of the Transitional Magnetic Cataclysmic Variable V405 Aurigae
Sing, David K.; Szkody, Paula; Howell, Steve B. +1 more
We present Far Ultraviolet Spectroscopic Explorer (FUSE) observations of the magnetic cataclysmic variable V405 Aurigae. Together with four other DQ Her-type binaries, V405 Aur forms a small subclass of intermediate polars that are likely to evolve into low magnetic field strength polars, similar to AM Her. Our co-added FUSE spectrum exhibits broa…
High Spatial Resolution Hubble Space Telescope NICMOS Observations of Markarian 231
Schneider, G.; Neugebauer, G.; Low, F. J.
Observations of Markarian 231 at 1.1 µm taken with NICMOS on the Hubble Space Telescope are described. The brightness of the object in the near-infrared, and the inherent short-term stability of the NICMOS optical and instrumental system, enables the application of special observational and analysis techniques that effectively increase high …
Infrared Space Observatory Observations of the 53W002 Group at 6.7 Microns: In Search of the Oldest Stellar Populations at z = 2.4
Keel, William C.; Windhorst, Rogier A.; Eales, Stephen A. +5 more
We present a deep Infrared Space Observatory (ISO) observation at 6.7 µm of the 53W002 group of galaxies and active galactic nuclei (AGNs) at z=2.4. This approximately samples the emitted K band. Faint, blue star-forming objects are not detected, as expected from their very blue color across the emitted optical and UV spectrum. However, 53W0…