ROOT for GLAST

ROOT is an integral part of the GLAST software architecture and is automatically included as one of the external libraries in a binary download of a GlastRelease.

Caution: A specific version of any release of Glast software uses a specific version of ROOT; any and all documentation assumes that the appropriate version of ROOT is being used.

For version numbers used with a specific release of Glast software, see Glast Package and External Library Content.

An object-oriented framework, ROOT was developed to address many of the data analysis needs of high-energy physics.

Visit the ROOT home page at: http://root.cern.ch/Welcome.html.

 

GLAST uses ROOT to store all output data, including the Summary Ntuple, and full trees for
Monte Carlo (MC), Digitization, and Reconstruction data. Many Offline users also use ROOT
to analyze the output from Gleam.

ROOT User's Guide

ROOT maintains a download page for the ROOT User's Guide from which you can
download .pdf file(s) of the individual chapters you are interested in, or download the entire
manual.

Keeping Up-to-Date

Keep up-to-date by subscribing to:

Also see:

ROOT - The Movie

ROOT - The Movie is a 2-cd set containing 6 hours of ROOT instruction; available from:

ftp-glast.slac.stanford.edu/glast.u06/rootmovie

Notes:

  • Requires RealPlayer; if you do not have it when you attempt to start the movie, you will be provided with a link to optain it.
  • Files are large. Copy all files into a single directory, then expand the .tar.gz files in place.
  • The presentation is broken into 3 days, and there are directories containing powerpoint slides broken into days 1 & 2, and day 3.
  • To start viewing the movie for Day 1, open the file named Day1StartHere.htm in your web browser.

Also refer to:

  • Fermilab Resources:
  • AstroROOT:

    Note: You can convert your FITS data file to ROOT using AstroRoot (available at /afs/slac.stanford.edu/g/glast/applications/astroTools).

    Execute the setup script for your shell (astroroot_setup.Xsh) and then convert the file by:

    tf2tree <fits-file> <root-file>

    The tree name is "events".

  • GLAST ROOT Macros:

    Note: A collection of GLAST specific ROOT macros is available within the RootAnalysis package.  This package is stored in our CVS repository.

Last updated by: Chuck Patterson 01/03/2006.