The AstroStat Slog » GREAT08 http://hea-www.harvard.edu/AstroStat/slog Weaving together Astronomy+Statistics+Computer Science+Engineering+Intrumentation, far beyond the growing borders Fri, 09 Sep 2011 17:05:33 +0000 en-US hourly 1 http://wordpress.org/?v=3.4 [ArXiv] 3rd week, Mar. 2007 http://hea-www.harvard.edu/AstroStat/slog/2008/arxiv-3rd-week-mar-2007/ http://hea-www.harvard.edu/AstroStat/slog/2008/arxiv-3rd-week-mar-2007/#comments Fri, 21 Mar 2008 22:20:33 +0000 hlee http://hea-www.harvard.edu/AstroStat/slog/2008/arxiv-3rd-week-mar-2007/ Markov chain Monte Carlo (MCMC) never misses a week from recently astro-ph. A book titled MCMC in astronomy will be a best seller. There are, in addition, very interesting non MCMC preprints.

  • [astro-ph:0803.2130] R. Aurich
       A spatial correlation analysis for a toroidal universe (MCMC)

  • [astro-ph:0803.2120]M. Martinez & M. Errando
       A new method to study energy-dependent arrival delays on photons from astrophysical sources (Likelihood function and goodness-of-fit)

  • [astro-ph:0803.2234] G. Dobler et.al.
       Lensing Probabilities for Spectroscopically Selected Galaxy-Galaxy Strong Lenses (could it be helpful to lay out GREAT08 challenges statistically?)

  • [astro-ph:0803.2529] M. Bazot, S. Bourguignon and J. Christensen-Dalsgaard
       Estimation of stellar parameters using Monte Carlo Markov Chains (MCMC)

  • [stat.AP:0803.2623] F. Dup\’e, J. Fadili, and J. L. Starck
       A proximal iteration for deconvolving Poisson noisy images using sparse representations

I’m used to see Markov Chain Monte Carlo (or lower case c in Chain) from statistical journals but in astronomical journals, Monte Carlo Markov Chains seem to be standard.

]]> http://hea-www.harvard.edu/AstroStat/slog/2008/arxiv-3rd-week-mar-2007/feed/ 0 The GREAT08 Challenge http://hea-www.harvard.edu/AstroStat/slog/2008/the-great08-challenge/ http://hea-www.harvard.edu/AstroStat/slog/2008/the-great08-challenge/#comments Fri, 29 Feb 2008 03:46:49 +0000 vlk http://hea-www.harvard.edu/AstroStat/slog/2008/the-great08-challenge/ Grand statistical challenges seem to be all the rage nowadays. Following on the heels of the Banff Challenge (which dealt with figuring out how to set the bounds for the signal intensity that would result from the Higgs boson) comes the GREAT08 Challenge (arxiv/0802.1214) to deal with one of the major issues in observational Cosmology, the effect of dark matter. As Douglas Applegate puts it:

We are organizing a competition specifically targeting the statistics and computer science communities. The challenge is to measure cosmic shear at a level sufficient for future surveys such as the Large Synaptic Survey Telescope. Right now, we’ve stripped out most of complex observational issues leaving a pure statistical inference problem. The competition kicks off this summer, but we want to give possible participants a chance to prepare.

The website www.great08challenge.info will provide continual updates on the competition.

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