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Database of Variable Stars

Database of Variable Stars. Bingqiu Chen & Biwei Jiang Beijing Normal University. Outline. Data Source MACHO & OGLE Database LINUX+Apach+MySQL+PHP Interface HTML+PHP search interface. Data Source. Long period  Long-term observation projects  Microgravitational Lensing projects

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Database of Variable Stars

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  1. Database of Variable Stars Bingqiu Chen & Biwei Jiang Beijing Normal University

  2. Outline • Data Source • MACHO & OGLE • Database • LINUX+Apach+MySQL+PHP • Interface • HTML+PHPsearch interface

  3. Data Source • Long periodLong-term observation projects Microgravitational Lensing projects • MACHO • Since1992 • B & R filters • OGLE • OGLE-I: 1992 -1995 • OGLE-II: 1997-2001 • OGLE-III: 2001-2009 • OGLE-IV：2009.9-

  4. Data • MACHO • 21747stars（RRLYR，ACEP…） • OGLE • OGLE-II: • Buldge: 200 000 • MCs: 68 000 • OGLE-III : LMC • Long Period Variables: 91 995 • RR Lyrae Stars:24 906 • Type II Cepheids & Anomalous Cepheids :197 + 83 • Classical Cepheids : 3361

  5. A example • One star was observed in both the two projects • 05:02:09.25 -69:23:30.4 OGLE-LMC-LPV-12798 LMC_SC15_174030 1.3562.17

  6. Model • Entity • Relationship between entities • Attribute • ID • Standardization

  7. Database of Variable Stars • Data • Images （ps，fits） • Reducted photfiles • Catalog • Entities ： • Types • Locations • Mean magnitude • Period etc.

  8. Database • Data files  Standard entities  Most important entities(cell source ) ( catalog) • Data accessed & operated • Application online etc. • LAMP

  9. LAMP • Platform ： • LINUX( FEDORA12) • Software for database： • MySQL • Application, Interface, Data download & upload ： • PHP（include JpGraph library） • Apach • PhpMyAdmin

  10. Web interface • Websearch interface： • Go to

  11. One example • An example in database(05:05:12 -69:24:40)

  12. Thanks !

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