190 citations · 1.3k across the 17 of their papers we have counts for
7 papers · 2 filters
Rapid X-ray Variability of Seyfert 1 Galaxies
S. Vaughan, A. C. Fabian, K. Iwasawa
The rapid and seemingly random fluctuations in X-ray luminosity of Seyfert galaxies provided early support for the standard model in which Seyferts are powered by a supermassive bl…
Spitzer and Hubble Constraints on the Physical Properties of the z~7 Galaxy Strongly Lensed by Abell 2218
E. Egami, J. -P. Kneib, G. H. Rieke +10
We report the detection of a z~7 galaxy strongly lensed by the massive galaxy cluster Abell 2218 (z=0.175) at 3.6 and 4.5 um using the Spitzer Observatory and at 1.1 um using the H…
The exceptional X-ray variability of the dwarf Seyfert nucleus NGC 4395
S. Vaughan, K. Iwasawa, A. C. Fabian +1
An analysis of the X-ray variability of the low luminosity Seyfert nucleus NGC 4395, based on a long XMM-Newton observation, is presented. The power spectrum shows a clear break fr…
Discovery of optically faint obscured quasars with Virtual Observatory tools
P. Padovani, M. G. Allen, P. Rosati +1
We use Virtual Observatory (VO) tools to identify optically faint, obscured (i.e., type 2) active galactic nuclei (AGN) in the two Great Observatories Origins Deep Survey (GOODS) f…
The Oxford-Dartmouth Thirty Degree Survey I: Observations and Calibration of a Wide-Field Multi-Band Survey
Emily C. MacDonald, Paul Allen, Gavin Dalton +13
The Oxford Dartmouth Thirty Degree Survey (ODTS) is a deep, wide, multi-band imaging survey designed to cover a total of 30 square degrees in BVRi'Z, with a subset of U and K band…
Submillimetre Observations of z>6 Quasars
Ian Robson, Robert Priddey, Kate Isaak +1
We report on submillimetre observations of three high redshift (z>6) quasars, made using the SCUBA camera on the JCMT. Only one of the sample was detected at 850um-- SDSS J1148+525…