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Serendipity and the SDSS: Discovery of the Largest Known Planetary Nebula on the Sky
Paul C Hewett, Michael J Irwin, Evan D Skillman +4
Investigation of spectra from the Sloan Digital Sky Survey reveals the presence of a region of ionized gas of >2 degrees diameter centered approximately at alpha = 10^h 37^m delta…
Spectroscopic detection of Type Ia Supernovae in the Sloan Digital Sky Survey
Darren S. Madgwick, Paul Hewett, Daniel Mortlock +1
We present the results of a novel new search of the first data-release from the Sloan Digital Sky Survey (SDSS-DR1) for the spectra of supernovae. The use of large spectroscopic ga…
Mapping the Remote Milky Way Halo using BHB stars at 70 < r < 130 kpc
L. Clewley, S. J. Warren, P. C. Hewett +2
We increase the number of remote halo tracers by using blue horizontal branch (BHB) stars out to Galactocentric distances of 130 kpc. We use SDSS EDR photometry and the VLT to dete…
The Anomaly in the Candidate Microlensing Event PA-99-N2
AGAPE Collaboration, J. H. An, N. W. Evans +14
The lightcurve of PA-99-N2, one of the recently announced microlensing candidates towards M31, shows small deviations from the standard Paczynski form. We explore a number of possi…
Theory of pixel lensing towards M31 -- II. The velocity anisotropy and flattening of the MACHO distribution
AGAPE Collaboration, E. Kerins, J. An +11
The POINT-AGAPE collaboration is currently searching for massive compact halo objects (MACHOs) towards the Andromeda galaxy (M31). The survey aims to exploit the high inclination o…
The Frequency and Radio Properties of Broad Absorption Line Quasars
Paul C. Hewett, Craig B. Foltz
A sample of 67 Broad Absorption Line quasars (BALQSOs) from the Large Bright Quasar Survey (LBQS) is used to estimate the observed and intrinsic fraction of BAL quasars in opticall…