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Spitzer spectral line mapping of supernova remnants. I. Basic data and principal component analysis
Molecules Abundances
2014/12/23
We report the results of spectroscopic mapping observations carried out toward small (1' × 1') regions within the supernova remnants W44, W28, IC 443, and 3C 391 using the Infrared Spectrograph (IRS) ...
Reionization constraints using Principal Component Analysis
dark ages reionization first stars intergalactic medium cosmology
2010/11/12
Using a semi-analytical model developed by Choudhury & Ferrara (2005) we study the observational
constraints on reionization via a principal component analysis (PCA). Assuming
that reionization at z...
A VARIANCE-COMPONENT ANALYSIS FOR THE LONGITUDE NETWORK ADJUSMENT
VARIANCE-COMPONENT ANALYSIS LONGITUDE NETWORK
2009/3/13
The problem of weights in the task of longitude-network adjustment
has not been solved yet because the structure of the observational variances
is unknown. During the adjustment of a part of the Eur...
