Weaving together Astronomy+Statistics+Computer Science+Engineering+Intrumentation, far beyond the growing borders
Author Archive
I found the following from Harvard Statistics department website.
Clay Public Lecture
Technology-driven Statistics
Terry Speed, UC Berkeley and WEHI in Melbourne, Australia
Tuesday, October 30, 2007, at 7:00 PM
Harvard University Sceince Center — Hall B
Continue reading ‘Clay Public Lecture: Technology-driven Statistics’ »
Quite interesting papers were up at arXiv, including a theoretical statistics paper that no astronomer manages to miss. To find the paper and others, please click
Continue reading ‘[ArXiv] 3rd week, Oct. 2007’ »
Frankly, there was no astrostatistically interesting paper from astro-ph this week but profitable papers from the statistics side were posted. For the list, click Continue reading ‘[ArXiv] 2nd week, Oct. 2007’ »
This week, instead of only filtering AstroStatistics related papers from arxiv, I chose additional arxiv/astro-ph papers related to CHASC folks’ astrophysical projects. Some of papers you see from this week do not have sophisticated statistical analysis but contain data from specific satellites and possibly relevant information related to CHASC projects. Due to the CHACS’ long history (we are celebrating the 10th birthday this year) and my being a newbie to CHASC, I may not pick up all papers related to the projects of current, former, and future CHASC members and dedicated slog readers. For creating a satisfying posting every week, your inputs are welcome to improve my adaptive filter. For the list of this week, click the following.
Continue reading ‘[ArXiv] 1st week, Oct. 2007’ »
Not knowing much about java and java applets in a software development and its web/internet publicizing, I cannot comment what is more efficient. Nevertheless, I thought that PHP would do the similar job in a simpler fashion and the followings may provide some ideas and solutions for publicizing statistical methods through websites based on Bayesian Inference.
Continue reading ‘Implement Bayesian inference using PHP’ »
A few papers from astro-ph may drag statisticians’ attention and a statistical paper may be helpful for astronomers, keen on confidence intervals utilizing prior information.
Continue reading ‘[ArXiv] 4th week, Sept. 2007’ »
After observing the recent discussion among CHASC, the following paper
P Values: What They Are and How to Use Them by Luc Demortier emerged from my mind.
Continue reading ‘P Values: What They Are and How to Use Them’ »
In addition to Short Timescale Coronal Variability in Capella [astro-ph:0709.3093], there were a few statistically interesting preprints came during the 3rd week of Sept. Continue reading ‘[ArXiv] 3rd week, Sept. 2007’ »
VOConvert or ConVOT is a small java script which does file format conversion from fits to ascii or the other way around. These tools might be useful for statisticians who want to convert astronomers’ data format called fits into ascii quickly for a statistical analysis. Additionally, VOConvert creates an interim output for VOStat, designed for statistical data analysis from Virtual Observatory. The softwares and the list of Virtual Observatories around the world can be found at Virtual Observatory India. Please, check a link in VOstat (http://hea-www.harvard.edu/AstroStat/slog/2007/vostat) for more information about VOstat.
The idea that some useful materials related to the Chandra calibration problem, which CHASC is putting an effort to, could be found from PHYSTAT conferences came along. Owing to the recent advanced technologies adopted by physicists (I haven’t seen any statistical conference offers what I obtained from PHYSTAT-LHC 2007), I had a chance to go through some video files from PHYSTAT-LHC 2007. The files are the recorded lectures and lecture notes. They are available from PHYSTAT-LHC 2007 Program.
Continue reading ‘PHYSTAT-LHC 2007’ »
In addition to preprints discussed in [ArXiv] Swift and XMM measurement errors, [ArXiv] SVM and galaxy morphological classification, Sept. 10, 2007, and [ArXiv] Recent bayesian studies from astro-ph, I wish to point a few more out from this week.
Continue reading ‘[ArXiv] 2nd week, Sept. 2007’ »
Over the years, I noticed the exponential increase of statistical applications from astronomical papers. Keeping the track of them and writing summaries based on daily arXiv updates for the slog over the past few months has become a quite overwhelming task for a single person. Therefore, instead of offering fish, I decide to offer how to catch fish.
Continue reading ‘How to subscribe to the arXiv email list service’ »
From arxiv/astro-ph:0709.1359,
A robust morphological classification of high-redshift galaxies using support vector machines on seeing limited images. I Method description by M. Huertas-Company et al.
Machine learning and statistical learning become more and more popular in astronomy. Artificial Neural Network (ANN) and Support Vector Machine (SVM) are hardly missed when classifying on massive survey data is the objective. The authors provide a gentle tutorial on SVM for galactic morphological classification. Their source code GALSVM is linked for the interested readers.
Continue reading ‘[ArXiv] SVM and galaxy morphological classification, Sept. 10, 2007’ »
From arxiv/astro-ph:0709.1073v1
On the Metallicity-Color Relations and Bimodal Color Distributions in Extragalactic Globular Cluster Systems by M. Cantiello and J. P. Blakeslee
Many observations on globular cluster systems (GCS) show bimodal distributions in color and metallicity space. The authors discussed the complication of non-linear metalicity and color relations and presented their careful study to suggest the optimal color(s) for revealing the presence of real bimodal GC metallicity distributions. Based on their simulation study, (V-H) and (V-K) are confirmed to be good colors for revealing unbiased bimodal metallicity distributions in GCS.
Continue reading ‘[ArXiv] Bimodal Color Distribution in GCS, Sept. 7, 2007’ »
In the past month, I’ve noticed relatively frequent paper appearance in arxiv/astro-ph whose title includes Bayesian or Markov Chain Monte Carlo (MCMC). Those papers are:
Continue reading ‘[ArXiv] Recent bayesian studies from astro-ph’ »