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Web Interface for Star Databases
of the „Pi of the Sky” Experiment
Marek BiskupWarsaw University
On behalf of the „Pi of the Sky” collaboration
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface2
Outline
Star data Interface
Star search Lightcurve view
Summary
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface3
„Pi” Stars
The database „Pi 2004-2005” 11 months of operation 2 cameras ~2 million stars per camera ~200 observations per star => Almost 1 billion of records
(almost 200GB)
Online databases for ongoing observations
Implementation in PostgreSQL
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface4
Other Catalogs Asas – star variability survey Gcvs – variable stars catalogue Tycho – nearly all stars up to 11m
All fits in the same database schema
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface5
Database Schema
Measurements information Additional information about frames, external stars, etc
Star
PK id
ra dec magnitude cam_id ...
Superstar
PK id
name ra dec tycho_id star_class ...
Measurement
time ra dec magnitude ccdx ccdy ...
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface6
Web interface
Modern technologies Php Javascript CSS Smarty DHTML AJAX
Configurable Adaptable for other catalogs
(Tycho, ASAS, GCVS)
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface7
Search form
Change database
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface8
Advanced search
Variability Types
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface9
Search results (1)
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface10
Search results (2)
Limited number of stars per plot
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface11
Interactive searching
Mouse-drawn rectangle
Click on a star to see its light curve
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface12
Light curve viewThe
lightcurveStar’s
properties
Lightcurve form
Advanced properties
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface13
Light curve Different colors mark
different fields of observation
Small dots mark points from the other camera
Other camera
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface14
Interactive light-curvingMouse-drawn
rectangle
Click
Observation properties
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface15
Lightcurve form AJAX-like picture fetching Bookmarking support Data exporting
CVS HTML table ROOT macro
Bad measurement elimination
Field selection
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface16
Switching between star databases
Direct – from the search form
From a light curve view Search by coordinates
(2’ around) Direct link to the same star
in other catalogs
Advanced star’s properties
Wilga, 2007-05-24 Marek Biskup, Pi Stars Web Interface17
Summary
Pi of the Sky has a large Star Database, which will be published soon
Existing star databases are wrapped with the same interface
Star data from all the catalogs can be easily browsed
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