Filters








71 Hits in 6.5 sec

Extending the SDSS Batch Query System to the National Virtual Observatory Grid [article]

Maria A. Nieto-Santisteban, William O'Mullane, Jim Gray, Nolan Li, Tamas Budavari, Alexander S. Szalay, Aniruddha R. Thakar
2004 arXiv   pre-print
This implies development, in a distributed manner, of several features, which have been demonstrated for a single node in the SDSS Batch Query System (CasJobs).  ...  Users may transfer data to their MyDB, and then perform further analysis before extracting it to their own machine. We intend to extend the MyDB and asynchronous query ideas to multiple NVO nodes.  ...  Batch System We developed a simple batch processing system 6 to address these problems.  ... 
arXiv:cs/0403017v1 fatcat:cfv4x7opufacdcqypvjlprjdwm

RCSED—A Value-added Reference Catalog of Spectral Energy Distributions of 800,299 Galaxies in 11 Ultraviolet, Optical, and Near-infrared Bands: Morphologies, Colors, Ionized Gas, and Stellar Population Properties

Igor V. Chilingarian, Ivan Yu. Zolotukhin, Ivan Yu. Katkov, Anne-Laure Melchior, Evgeniy V. Rubtsov, Kirill A. Grishin
2017 Astrophysical Journal Supplement Series  
Accessible from the Virtual Observatory (VO) and complemented with detailed information on galaxy properties obtained with the state-of-the-art data analysis, RCSED enables direct studies of galaxy formation  ...  RCSED comprises integrated k-corrected photometry in up-to 11 ultraviolet, optical, and near-infrared bands published by the GALEX, SDSS, and UKIDSS wide-field imaging surveys; results of the stellar population  ...  We provide the exact query that we used to select this sample in the SDSS CasJobs Data System 2 in Appendix B. The query executed in the DR7 CasJobs context returned 800,299 records.  ... 
doi:10.3847/1538-4365/228/2/14 fatcat:oqkpifflcrcntgauwp22sskawe

AstroGrid-D: Grid technology for astronomical science

Harry Enke, Matthias Steinmetz, Hans-Martin Adorf, Alexander Beck-Ratzka, Frank Breitling, Thomas Brüsemeister, Arthur Carlson, Torsten Ensslin, Mikael Högqvist, Iliya Nickelt, Thomas Radke, Alexander Reinefeld (+7 others)
2011 New Astronomy  
Section 3.2 characterises the central components of our architecture: The AstroGrid-D information service to collect and store metadata, a file management system, the data management system, and a job  ...  We present status and results of AstroGrid-D, a joint effort of astrophysicists and computer scientists to employ grid technology for scientific applications.  ...  We acknowledge the special memorandum of understanding between Astrogrid-D and the astronomical segment of Ukrainian Academic GRID Network.  ... 
doi:10.1016/j.newast.2010.07.005 fatcat:4lwbieijjbgabjyewusximdnay

Poster reception---Harnessing grid resources to enable the dynamic analysis of large astronomy datasets

Ioan Raicu, Ian Foster, Alex Szalay
2006 Proceedings of the 2006 ACM/IEEE conference on Supercomputing - SC '06  
To address this question, we have developed a Web Services-based system, AstroPortal, that uses grid computing to federate large computing and storage resources for dynamic analysis of large datasets.  ...  Our answer is "AstroPortal," a gateway to grid resources tailored for the astronomy community.  ...  We have identified a few possible scenarios from the anticipated use of the National Virtual Observatory [cite] data that are currently used to experiment with this approach.  ... 
doi:10.1145/1188455.1188611 dblp:conf/sc/RaicuFS06 fatcat:l5mjdomo4rd45em2dz4ib52pyq

Grids, the TeraGrid and beyond

D.A. Reed
2003 Computer  
These tools include middleware such as the Globus toolkit, security systems, interfaces for accessing grid resources, and applications capable of running effectively on distributed systems.  ...  NCSA, SDSC, and their partners have built many of the tools needed to operate grid-based distributed computing and information infrastructures.  ...  Correlating such data to identify new phenomena and test theories motivated the recent creation of the United States National Virtual Observatory (NVO) and the European Astrophysical Virtual Observatory  ... 
doi:10.1109/mc.2003.1160057 fatcat:ecffqp46zbdzpjfdjna6wreazi

Interactive 3D visualization for theoretical virtual observatories

T Dykes, A Hassan, C Gheller, D Croton, M Krokos
2018 Monthly notices of the Royal Astronomical Society  
We discuss some of the challenges for interactive 3d visualization and how it can augment the workflow of users in a virtual observatory context.  ...  Virtual Observatories (VOs) are online hubs of scientific knowledge.  ...  This work utilized the gSTAR national facility at Swinburne University of Technology. gSTAR is funded by Swinburne and the Australian Government's Education Investment Fund.  ... 
doi:10.1093/mnras/sty855 fatcat:2acnsvll3bbppgu443444nmwtq

The Locus Algorithm III: A Grid Computing system to generate catalogues of optimised pointings for Differential Photometry [article]

Oisń Creaner, Kevin Nolan, John Walsh, Eugene Hickey
2020 arXiv   pre-print
This paper discusses the hardware and software components of the Grid Computing system used to implement the Locus Algorithm to identify optimum pointings for differential photometry of 61,662,376 stars  ...  The physical and logical structure of the National Grid computing Infrastructure informed the approach that was taken.  ...  SDSS Acknowledgement: This paper makes use of data from the Sloan Digital Sky Survey (SDSS). Funding for the SDSS and SDSS-II has been provided by the Alfred P.  ... 
arXiv:2003.04565v2 fatcat:2arcttcukrck7kl2rt2p752mpm

Managing scientific data

Anastasia Ailamaki, Verena Kantere, Debabrata Dash
2010 Communications of the ACM  
The inefficiency of existing database management systems (DBMSs) for addressing the requirements of scientists has led to many application-specific systems.  ...  Here, we explore the most important requirements of such systems and the techniques being used to address them.  ...  The data is also published (publicly) once every two years through virtual observatories (http://www. sdss.org/dr7, the final release of the SDSS-II project) by running SQL on the database at the observatories  ... 
doi:10.1145/1743546.1743568 fatcat:vw57d23aorchtntng6jlrccs6y

The GalMer database: galaxy mergers in the virtual observatory

I. V. Chilingarian, P. Di Matteo, F. Combes, A.-L. Melchior, B. Semelin
2010 Astronomy and Astrophysics  
We present the GalMer database, a library of galaxy merger simulations, made available to users through tools compatible with the Virtual Observatory (VO) standards adapted specially for this theoretical  ...  the resolution has to be high enough at galaxy scales, to provide realistic physics.  ...  A server dedicated to the on-the-fly computations and the database in Paris Observatory has been provided by the VO Paris Data Centre.  ... 
doi:10.1051/0004-6361/200912938 fatcat:4t6atypuzbelddow4pj3khj3yy

Managing scientific data

Anastasia Ailamaki
2011 Proceedings of the 2011 international conference on Management of data - SIGMOD '11  
The inefficiency of existing database management systems (DBMSs) for addressing the requirements of scientists has led to many application-specific systems.  ...  Here, we explore the most important requirements of such systems and the techniques being used to address them.  ...  The data is also published (publicly) once every two years through virtual observatories (http://www. sdss.org/dr7, the final release of the SDSS-II project) by running SQL on the database at the observatories  ... 
doi:10.1145/1989323.1989433 dblp:conf/sigmod/Ailamaki11 fatcat:3cxviarugnfoldnqz3csgjczqu

Active deep learning method for the discovery of objects of interest in large spectroscopic surveys [article]

Petr Škoda
2020 arXiv   pre-print
After several iterations, the network was able to successfully identify emission-line stars with an error smaller than 6.5 the Virtual Observatory to visualise the results, we discovered 1013 spectra of  ...  The initial training of the network was performed on a labelled set of about 13000 spectra obtained in the region around Hα by the 2m Perek telescope of the Ondřejov observatory, which mostly contains  ...  Funding for the project has been provided by the National Development and Reform Commission. LAMOST is operated and managed by the National Astronomical Observatories, Chinese Academy of Sciences.  ... 
arXiv:2009.03219v1 fatcat:e3ctrmpahbhpnmtvusbj7cndne

Physical parameters of young M-type stars and brown dwarfs with VOSA [article]

Amelia Bayo, Carlos Rodrigo, David Barrado, Enrique Solano, France Allard, Viki Joergens
2013 arXiv   pre-print
In this context of opulence of objects and data, the Virtual Observatory comes in naturally as an excellent framework to efficiently advance in the knowledge of M-type sources.  ...  We put special emphasis in the benefits of using the new capabilities of VOSA (Virtual Observatory SED Analyzer, Bayo et al. 2008; in operation since 2008 and in constant development) to study large samples  ...  This publication makes use of VOSA, developed under the Spanish Virtual Observatory project supported from the Spanish MICINN through grants AYA2008-02156 and AYA2011-24052.  ... 
arXiv:1312.2739v1 fatcat:s6s3evklundwjghw2i67wf6qly

Multi-wavelength image space: another Grid-enabled science

Roy Williams, Bruce Berriman, Ewa Deelman, John Good, Joseph Jacob, Carl Kesselman, Carol Lonsdale, Seb Oliver, Thomas A. Prince
2003 Concurrency and Computation  
This virtual data can be created and replicated with Planners and Replica catalog technology developed under the GriPhyN project. We plan to deploy our system (MONTAGE) on the US Teragrid.  ...  We describe a new Grid-enabled branch of astronomy: multi-wavelength images. To see sky images in the same pixel space, they must be projected to that space, a compute-intensive process.  ...  These services have been identified as cornerstones of the National Virtual Observatory.  ... 
doi:10.1002/cpe.715 fatcat:6ug3itiwuze4zax3mpvzwawyhq

Active deep learning method for the discovery of objects of interest in large spectroscopic surveys

P. Skoda, O. Podsztavek, P. Tvrdík
2020 Astronomy and Astrophysics  
Using the technology of the Virtual Observatory to visualise the results, we discovered 1013 spectra of 948 new candidates of emission-line objects in addition to 664 spectra of 549 objects that are listed  ...  The initial training of the network was performed on a labelled set of about 13 000 spectra obtained in the 400 Å wide region around Hα by the 2 m Perek telescope of the Ondřejov observatory, which mostly  ...  Then, we use the uncertainty sampling query strategy to obtain a batch of samples for labelling by an oracle that labels all the samples in the batch.  ... 
doi:10.1051/0004-6361/201936090 fatcat:llvs4wbvdfgzhezpszfybknhgm

The SDSS skyserver

Alexander S. Szalay, Jim Gray, Ani R. Thakar, Peter Z. Kunszt, Tanu Malik, Jordan Raddick, Christopher Stoughton, Jan vandenBerg
2002 Proceedings of the 2002 ACM SIGMOD international conference on Management of data - SIGMOD '02  
These images try to lead the viewer to articles about these cbjects, and let them drill down to view the objects within the SDSS data.  ...  To drill down further, there is a text and a GUI SQL interface that lets sophisticated users mine the SDSS database.  ...  Acknowledgements We acknowledge our obvious debt to the people who built the SDSS telescope, those who operate it, those who built the SDSS processing pipelines, and those who operate the pipeline at Fermilab  ... 
doi:10.1145/564691.564758 dblp:conf/sigmod/SzalayGTKMRSv02 fatcat:v5kxmqaqtfbpvkaxfiw4eqeatm
« Previous Showing results 1 — 15 out of 71 results