DISPLAYING THE HETEROGENEITY OF THE SN 2002cx-LIKE SUBCLASS OF TYPE Ia SUPERNOVAE WITH OBSERVATIONS OF THE Pan-STARRS-1 DISCOVERED SN 2009ku**This Letter includes data gathered with the 6.5 m Magellan Telescopes located at the Las Campanas Observatory, Chile; the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan; the Nordic Optical Telescope, operated by Denmark, Finland, Iceland, Norway, and Sweden; the Liverpool Telescope operated by the Liverpool John Moores University with financial support from the UK Science and Technology Facilities Council on the island of La Palma in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias; and the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the National Science Foundation.
The Astrophysical Journal Letters American Astronomical Society 731:1 (2011) l11
Observing pulsars and fast transients with LOFAR
ArXiv 1104.1577 (2011)
Abstract:
Low frequency radio waves, while challenging to observe, are a rich source of information about pulsars. The LOw Frequency ARray (LOFAR) is a new radio interferometer operating in the lowest 4 octaves of the ionospheric "radio window": 10-240MHz, that will greatly facilitate observing pulsars at low radio frequencies. Through the huge collecting area, long baselines, and flexible digital hardware, it is expected that LOFAR will revolutionize radio astronomy at the lowest frequencies visible from Earth. LOFAR is a next-generation radio telescope and a pathfinder to the Square Kilometre Array (SKA), in that it incorporates advanced multi-beaming techniques between thousands of individual elements. We discuss the motivation for low-frequency pulsar observations in general and the potential of LOFAR in addressing these science goals. We present LOFAR as it is designed to perform high-time-resolution observations of pulsars and other fast transients, and outline the various relevant observing modes and data reduction pipelines that are already or will soon be implemented to facilitate these observations. A number of results obtained from commissioning observations are presented to demonstrate the exciting potential of the telescope. This paper outlines the case for low frequency pulsar observations and is also intended to serve as a reference for upcoming pulsar/fast transient science papers with LOFAR.Probing the history of SS433's jet kinematics via Decade-resolution radio observations of W50
ArXiv 1103.5658 (2011)