May 11th, 2008| 10:42 pm | Posted by hlee
I think I have to review spatial statistics in astronomy, focusing on tessellation (void structure), point process (expanding 2 (3) point correlation function), and marked point process (spatial distribution of hardness ratios of X-ray distant sources, different types of galaxies -not only morphological differences but other marks such as absolute magnitudes and existence of particular features). When? Someday…
In addition to Bayesian methodologies, like this week’s astro-ph, studies on characterizing empirical spatial distributions of voids and galaxies frequently appear, which I believe can be enriched further with the ideas from stochastic geometry and spatial statistics. Click for what was appeared in arXiv this week. Continue reading ‘[ArXiv] 1st week, May 2008’ »
Tags:
Classification,
covariance,
FARIMA,
Fisher information,
GL,
GRB,
Levy,
light curve,
limb darkening,
ML,
Pareto distribution,
quasars,
solar flare,
standard candle,
tessellation,
time series,
VO,
void Category:
MCMC,
Uncertainty,
arXiv |
1 Comment
Mar 3rd, 2008| 12:39 pm | Posted by hlee
In this posting, I added lecture notes on cosmic microwave background (CMB) and Gravitas DVD (animation, I believe). There is another paper I must include but I decide to write a short review separately. Continue reading ‘[ArXiv] 4th week, Feb. 2008’ »
Tags:
animation,
bimodality,
CMB,
exoplanet,
Fisher matrix,
flare,
GRAVITAS,
lecture notes,
light curve,
Nikos Voglis,
state space,
stochastic Category:
arXiv |
Comment
Feb 1st, 2008| 01:45 pm | Posted by hlee
This is an edited email copy of Colloquium Announcement from Tufts University, MA. A must go for those live in Medford and Somerville, where Tufts Univ. is located and its vicinity.
Subject : Special Joint CS and Physics Colloquium
Title : How Astronomers, Computer Scientists and Statisticians are working together to tackle hard problems in astronomy
Speaker: Pavlos Protopapas
Date : Thursday February 7
Time : 3:15 pm
Place : Nelson Auditorium, Anderson Hall (Click for the map, 200 College Ave, Medford, MA, I think)
Abstract: Continue reading ‘working together to tackle hard problems in astronomy’ »
Dec 3rd, 2007| 08:58 pm | Posted by hlee
Astronomers are hard working people, day and night, weekend and weekdays, 24/7, etc. My vacation delayed this week’s posting, not astronomers nor statisticians. Continue reading ‘[ArXiv] 5th week, Nov. 2007’ »
Jul 16th, 2007| 12:15 pm | Posted by hlee
From arxiv/astro-ph:0707.1900v1
The complete catalogue of gamma-ray bursts observed by the Wide Field Cameras on board BeppoSAX by Vetere, et.al.
This paper intend to publicize the largest data set of Gamma Ray Burst (GRB) X-ray afterglows (right curves after the event), which is available from http://www.asdc.asi.it. It is claimed to be a complete on-line catalog of GRB observed by two wide-Field Cameras on board BeppoSAX (Click for its Wiki) in the period of 1996-2002. It is comprised with 77 bursts and 56 GRBs with Xray light curves, covering the energy range 40-700keV. A brief introduction to the instrument, data reduction, and catalog description is given.
Tags:
afterglow,
BeppoSAX,
catalog,
GRB,
light curve Category:
Data Processing,
Objects,
Spectral,
Timing,
X-ray,
arXiv,
gamma-ray |
1 Comment