A Caltech Library Service

Exploration of parameter spaces in a virtual observatory

Djorgovski, S. G. and Mahabal, A. and Brunner, R. and Williams, R. and Granat, R. and Curkendall, D. and Jacob, J. and Stolorz, P. (2001) Exploration of parameter spaces in a virtual observatory. In: Astronomical Data Analysis. Proceedings of SPIE. No.4477. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 43-52. ISBN 9780819441911.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


Like every other field of intellectual endeavor, astronomy is being revolutionized by the advances in information technology. There is an ongoing exponential growth in the volume, quality, and complexity of astronomical data sets, mainly through large digital sky surveys and archives. The Virtual Observatory (VO) concept represents a scientific and technological framework needed to cope with this data flood. Systematic exploration of the observable parameter spaces, covered by large digital sky surveys spanning a range of wavelengths, will be one of the primary modes of research with a VO. This is where the truly new discoveries will be made, and new insights be gained about the already known astronomical objects and phenomena. We review some of the methodological challenges posed by the analysis of large and complex data sets expected in the VO-based research. The challenges are driven both by the size and the complexity of the data sets (billions of data vectors in parameter spaces of tens or hundreds of dimensions), by the heterogeneity of the data and measurement errors, including differences in basic survey parameters for the federated data sets (e.g., in the positional accuracy and resolution, wavelength coverage, time baseline, etc), various selection effects, as well as the intrinsic clustering properties (functional form, topology) of the data distributions in the parameter spaces of observed attributes. Answering these challenges will require substantial collaborative efforts and partnerships between astronomers, computer scientists, and statisticians.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Djorgovski, S. G.0000-0002-0603-3087
Mahabal, A.0000-0003-2242-0244
Additional Information:© 2001 Society of Photo-optical Instrumentation Engineers (SPIE). This work was supported in part by the NASA AISRP grant NAG5-9482, and by private foundations. We wish to thank numerous collaborators, and colleagues working on making the VO vision become a reality.
Funding AgencyGrant Number
Subject Keywords:Virtual Observatory, Clustering Analysis, Data Mining, Digital Sky Surveys, Parameter Spaces
Series Name:Proceedings of SPIE
Issue or Number:4477
Record Number:CaltechAUTHORS:20180711-092405965
Persistent URL:
Official Citation:S. George Djorgovski, Ashish Mahabal, Robert J. Brunner, Roy E. Williams, R. Granat, David Curkendall, Joseph C. Jacob, Paul Stolorz, "Exploration of parameter spaces in a virtual observatory", Proc. SPIE 4477, Astronomical Data Analysis, (1 November 2001); doi: 10.1117/12.447189;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87744
Deposited By: Tony Diaz
Deposited On:11 Jul 2018 17:18
Last Modified:15 Nov 2021 20:51

Repository Staff Only: item control page