virtual observatory c urrent trends and development
DESCRIPTION
Xiaowei Liu Peking University University College London. Virtual Observatory C urrent trends and development. Topics. (Practical) Efforts towards a VO (sci., tech.) European activities and reaction to the concept of VOs SRM - conferences on VOs Data-mining (a common problem). - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/1.jpg)
Virtual Observatory Current trends and development
Xiaowei LiuPeking University
University College London
![Page 2: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/2.jpg)
Topics
● (Practical) Efforts towards a VO (sci., tech.)● European activities and reaction to the concept
of VOs● SRM - conferences on VOs● Data-mining (a common problem)
![Page 3: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/3.jpg)
➔ Archive Research proposals
➔ Legacy Archive Research proposals (cycle 11)– The project should perform a homogeneous analysis of a well-
defined subset of data in the HST Archive.
– The main goal should be to provide a homogeneous set of calibrated data and/or ancillary data products (catalogs, software tools, web interfaces etc.) to the scientific community.
– The results of the project should enable a variety of new and important types of scientific investigations.
![Page 4: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/4.jpg)
![Page 5: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/5.jpg)
Infrared Space Observatory (ISO)
ISO carried out 26000 observations during its 28 months lifetime.
![Page 6: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/6.jpg)
First look
Whole archive downloaded
twice!
![Page 7: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/7.jpg)
Approaching space-borne obs. mode: ➢Standardisation of data taking➢ Service observations➢ P2PP - Observation blocks
ESO VLT
![Page 8: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/8.jpg)
![Page 9: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/9.jpg)
Trends and conclusions
● Large data set from space borne mission, ● Standardisation of ground-based observations
and systematically data archiving
Data-mining becomes a very important aspect of research
New sciences possible VOs
![Page 10: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/10.jpg)
National Virtual Observatory
Graphics from US NVO project
![Page 11: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/11.jpg)
Astrovirtel An European Project
![Page 12: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/12.jpg)
Approved Astrovirtel proposals
![Page 13: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/13.jpg)
First significant discovery based on Astrovirtel
First discovered by Millis R., Elliot J. L., Wasserman L H., NOAO PR01-10, 2 July 2001,with an estimated R = 960 km.
Latest estimate using Astrovirtel yields:d = 43 AU, R = 1200 km (Hahn G, et al., ESO PR 23 Aug. 2001)
![Page 14: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/14.jpg)
Astrophysical Virtual Observatory➢ Proposal submitted to EC in February 2001➢ Consortium: ESO, ESA/ST-ECF, CDS Strassbourg, terapix IAP Paris, Astrogrid UK, Jodrell Bank➢ Activities - AVO science - Archive interoperability - Technological infrastructure➢ Phase A - Realistic test bed for GRID-type distributed infrastructures - Address and verify against existing archive for: Quality and availability of calib. pipelines & calib. data Characterisation of the PSF or seeing over the filed of the images Limiting magnitudes and surface brightness Photometrical conditions, astrometry characterisation - Analysis tools for large distributed data set - Policy: Open on-line facility or Controlled infrastructure with dedicated funds or specialised assistance, selection via standard "Call for proposals" - Phase B design
AVO Science Working GroupPiero Benvenuti (ST-ECF)Email: [email protected]: September 21st 2001
![Page 15: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/15.jpg)
UK PPARC -Long Term Science Review
![Page 16: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/16.jpg)
![Page 17: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/17.jpg)
![Page 18: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/18.jpg)
AstroGrid projectAstroGrid project
• developed during LTSR• proposal to PPARC October 2000• three year project• one year Phase A study
– community consultation– science requirements analysis– benchmark tests– pilot database federations
• we need use-cases....
NAM 2001 Andy Lawrence
Cambridge
![Page 19: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/19.jpg)
Phase B - preliminaryPhase B - preliminary
• uniform AstroGrid interface• data-mining machines connected in grid• tool for simultaneous browsing
– plus advanced visualisation, links to spectra etc.
• tools for advanced database analysis– advanced querying, mixture fitting, statistical manipulations etc.
• tools for on-line data analysis– statistics, model fitting
• system for uploading code
NAM 2001 Andy Lawrence
Cambridge
![Page 20: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/20.jpg)
Conferences on Virtual Observatories➢ VOs of the Future (SRM for NVO) (Caltech, Pasadena, June 13 - 16, 2000) - Explore the possibilities for new astronomy with large digital sky surveys - Define the technical needs and the mandate for the future NVO (GVO) Overviews of existing efforts; New science with a VO; Hardware & network; Statistics & data mining; Data format & visualization, archive interoperability; Education & public outreach
➢ Mining the Sky (MPA/ESO/MPE Garching, German, July 31 - August 4, 2000) - Numerical and statistical analysis of large astronomical datasets - Large-scale computer simulations - Data mining
➢ Astronomical Data Analysis Software & Systems X (SAO, Boston, November 12-15, 2000) - Astronomy technologies; Sky surveys; Public outreach - Software development history, methodologies & technologies - Science data pipelines; IRAF, DS9, AIPS++, FITS, IDL, Linux, Cobra
![Page 21: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/21.jpg)
Conferences on Virtual Observatories➢ Theoretical Data in Virtual Observatories (Tucson, Mar. 20-21, 2001) ➢ New Astrophysics and Cosmology with a Virtual Observatory Science with Wide-Field Survey Telescopes (Aspen Center for Physics, May 27-June 10, 2001)
➢ Statistical Challenges in Modern Astronomy III (Penn State, July 18-21, 2001)
➢ SPIE 46th Ann. Meeting, Conf. 4477 on Astron. Data Analysis (San Diego, July 29-August 3, 2001) - Data Mining: Sky Survey Data Analysis, Detection, Classification - Data Modeling, Background Estimation, Cosmic Ray Removal, ... - Data Analysis and Statistical Methods - Image Compression, Databases, Information Retrieval,... - Virtual Observatory, Computational Grids - Autonomous Agents, Distributed Computing Environments,...
![Page 22: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/22.jpg)
Conferences on Virtual Observatories➢ Joint European and National Astronomical Meeting Joint Discussion 2: Virtual Observatory (Munich, September 10-15, 2001) - What is a virtual observatory? - Why do we need a virtual observatory? - Virtual Observatory activities in Europe, JAPAN, and USA - Oral and Poster Contributions - General Discussion
![Page 23: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/23.jpg)
![Page 24: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/24.jpg)
![Page 25: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/25.jpg)
![Page 26: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/26.jpg)
![Page 27: Virtual Observatory C urrent trends and development](https://reader035.vdocuments.mx/reader035/viewer/2022062519/56814c57550346895db974bb/html5/thumbnails/27.jpg)
Virtual Observatories - New Opportunity, New Challenge
● The ever-increasing amount of high-quality scientific data stored in various astronomical archives is becoming a `source' that can be utilised by research teams in an equivalent fashion to observing with a `physical' telescope at a ground or space-based observatory
– "Observatory": A connected and interoperating set of astron. archives
– "Telescopes": Network of archives
– "Instruments": Suite of software tools to query and analyse the data
● Case for a Chinese National Virtual Observatory
– Unavoidable
– Observations driven and oriented, more balanced researches
– Fast track, Cost-effective
– SRM or SWG