1 / 14

GENEVAC: An Application for Calculating, Viewing and Storing Gamma-ray Burst Data

GENEVAC: An Application for Calculating, Viewing and Storing Gamma-ray Burst Data. Sam Stafford The Ohio State University Department of Physics G RB Temporal Analysis Workshop Los Alamos, NM August 29-31, 2011. Overview. Summary of GENEVAC application Live Demo HTML output

dulcea
Download Presentation

GENEVAC: An Application for Calculating, Viewing and Storing Gamma-ray Burst Data

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. GENEVAC: An Application for Calculating, Viewing and Storing Gamma-ray Burst Data Sam Stafford The Ohio State University Department of Physics GRB Temporal Analysis Workshop Los Alamos, NM August 29-31, 2011

  2. Overview • Summary of GENEVAC application • Live Demo • HTML output • Possible extensions

  3. Motivation • Over 5,000 bursts recorded since 1970’s • Multiple instrument sources; numerous observable parameters • Need for versatile, modular platform • Common, user-readable format for GRB data to facilitate multiple analyses: • Lightcurves and spectra (prompt, afterglow) • Neutrino emission • Lags • Variability

  4. GENEVACGamma-ray-burst Electromagnetic and Neutrino Emission Viewer And Calculator Database of GRB object data Graphical program for parameter calculation and plotting: Light curve Electromagnetic spectra Neutrino spectra Modular design / extensibility Lag / variability Afterglow

  5. Graphical User Interface • Gamma-ray lightcurves • Multiple energy-band display • User-selectable bin size • Background subtraction (polynomial regression) • Drag-and-release zoom • Breakout-window feature on graph displays • Facilitates larger display / easier navigation • Enhanced display controls

  6. Graphical User Interface • Gamma-ray and neutrino parameters • Parameters can be calculated or entered manually • Up to four simultaneous models • Pre-programmed and User-definable models • Electromagnetic and neutrino energy spectrum displays • Detector effective area and event rate • Error bars supported in calculations and plots • Graph data can be exported to table • Read/write to GRB object database

  7. GENEVAC Database • Stored in user-readable format • Simple keyword structure, can be entered manually or from the GENEVAC screens. • Designed for multiple instrument data sources (currently supports BATSE, Swift/BAT, HETE; extensible to Fermi, etc.) • Currently populated with >70 long bursts from BATSE catalog • Batch conversion process from native instrument data structure to GENEVAC database

  8. GENEVAC Database Partial list of valid database keywords: • OBJECT_ID • INSTRUMENT_ID • TRIGGER_NUMBER • RIGHT_ASCENSION • DECLINATION • PEAK_LUMINOSITY • JET_ANGLE • T90_DURATION • BREAK_ENERGY • REDSHIFT • LORENTZ_BOOST

  9. GENEVAC Demo

  10. HTML Output • Object index page • Individual GRB data page: • Parameter table • Light curves • Electromagnetic and neutrino spectra • Detector effective area • Event counts

  11. Design Considerations • Modular design • Most functions can be called in batch mode as well as in screen display • Allows separation of components among multiple servers if needed • Interface-centered design • Allows delegation of computation-intensive tasks • Allows alternate GUI modules (e.g., web client) • Written in Java™ 6.0, using Java™ Swing GUI utilities (well-known, mature industry standard; short development cycle) • Object-oriented programming model • Designed to run on any computer with a Java Runtime Environment (JRE). • Web-based version under consideration

  12. Architecture Graphical User Interface Lightcurves Parameters Spectra Web client (proposed) GRB Calculation Model GRB Data Model Database Parameter files Temporal data HTML Utilities Static web pages • Libraries • Data types • BG subtraction • Utilities Externally-defined formalisms (in development)

  13. Future Initiatives • Afterglow analysis • Additional instruments (e.g. Fermi) • Spectral lag (Cross-correlation function, pulse fit) • Variability analysis (wavelet, FFT) • Web client • Usability enhancements (e.g., undo stack)

  14. Summary • Database of GRB object data • Graphical program for calculating parameters: • Lightcurve • Electromagnetic spectra • Neutrino spectra • HTML output • Object index table • Spectrum, event rate plots • Modular, extensible design • Web client • Afterglow • Variability analysis

More Related