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PDS 456: an Extreme Accretion Rate Quasar?
J. N. Reeves, P. T. O'Brien, S. Vaughan +5
We present quasi-simultaneous ASCA and RXTE observations of the most luminous known AGN in the local (z<0.3) Universe, the recently discovered quasar PDS 456. Multiwavelength obser…
Searching for X-ray Luminous Starburst Galaxies
A. Zezas, A. Alonso-Herrero, M. J. Ward
The existence or otherwise of X-ray luminous star-forming galaxies has been an open question since the era of the Einstein satellite. Various authors have claimed the discovery of…
X-ray luminous star-forming galaxies
A. L. Zezas, I. Georgantopoulos, M. J. Ward
We present results from the cross-correlation of the spectroscopic atlas of Ho etal (1995) with the ROSAT All-Sky Survey Bright Source Catalogue, in an attempt to understand the X-…
ROSAT observations of the dwarf starforming galaxy Holmerg II (UGC 4305)
A. L. Zezas, I. Georgantopoulos, M. J. Ward
We present ROSAT PSPC and HRI observations of the dwarf irregular galaxy Holmberg II (UGC4305). This is one of the most luminous dwarf galaxies (Lx~ 10^{40} erg s^{-1} cm^{-2}) det…