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Monthly Archives: October 2010
Networking at the 1st African school on synthesis imaging in radioastronomy at hartrao (South Africa)
From all corners of the world and Africa, we met at Hartebeesthoek Radio Astronomy Observatory (HartRAO) , west of Johannesburg in South Africa. We came to learn about synthesis imaging in radioastronomy : a first on the African continent. As … Continue reading
Filming with the BBC
As part of the 4 part BBC series Wonders of the Universe, I took part in filming of the episode on Time, around the old mining town of Kolmanskop, Namibia abandoned in 1954, the perfect place to illustrate the concept … Continue reading
Posted in General
Tagged BBC, Kolmanskop, Namibia, thermodynamics, time, Wonders of the Universe
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Radio imaging
The first SKA sponsored Synthesis Imaging in Radio Astronomy workshop took place at HartRAO from 9 to 16 October. Several members of the AIMS group attended along with other astronomers and cosmologists from around South Africa. A large … Continue reading
Group publications in September
One new paper was published, and one was revised this month: Optical discovery of stellar tidal disruption flares by Sjoert van Velzen et al. with Mathew Smith (arXiv:1009.1627) The Cosmic Microwave Background in an Inhomogeneous Universe – why void models … Continue reading
Posted in Publications
Tagged arXiv, CMB, Dark Energy, Inhomogeneous universe, publications, Stellar Tidal Disruption Flares
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Cosmological N-body simulations workshop
On Monday, October 4 we welcomed about 30 participants to a cosmological N-body simulation workshop organised by Andreas Faltenbacher (UWC) and Mat Smith (UCT/AIMS). People from the University of Cape Town, the University of the Western Cape, the South African … Continue reading
Computing errors: data, models, errors and estimates
René Andrae has given the astronomy community a great paper, not to be published, but definitely to be read, about: ‘Error estimation in astronomy: A guide’ Error propagations, means, medians, maximum likelihood points, thresholds, marginalisations, etc. all are nuances that … Continue reading