New! Pointlike Tutorial

Navigating the Science Tools Section of the Workbook:

New to the collaboration? If you have recently joined the collaboration and are wondering how best to get started, go to the LAT User Workbook's Home page by clicking on the sky map in the upper left corner of this page, then click on the rednavbar's 'Get Started' button and follow the instructions working from left to right on the 2nd-level 'Get Started' navigation bar. When you are finished, click on the rednavbar's blue 'Science Tools' button to return to this page.

'SciTools Home': Clicking on the 'SciTools Home' button on the blue navigation button above will bring you back to this page.

Sky Map/WB Home. Clicking on the sky map (upper left corner) will return you to the Workbook's Home page.

To explore this section of the WB, click on the buttons listed below; this will bring up the following 2nd-level navigation bars:

Data Selection
Extract LAT Data
Extract LAT data from SLAC's data server using the Astro Server.
     
 
Explore LAT Data

Look at and manipulate LAT data using gtbin; gtselect; gtmktime; gtltcube; gtltsum; gtexpcube; ds9; and fv.

     
 
Explore LAT Data (for Burst)
Look at a map of the photons in the region around a source and at a lightcurve of the photons from a source, then investigate a suspected burst.
     
Source Analysis
Likelihood
 Step-by-step example of an unbinned likelihood analysis.
     
 

Binned
Likelihood

 Step-by-step example of a binned likelihood analysis.
     
 

Likelihood Analysis
from Python

 Access likelihood analysis modules from Python.
     
 
Source Identification
Step-by-step example of LAT source identification.
     
GRB Analysis
GBM Gamma-Ray
Burst Analysis
Step-by-step example of using Xspec (X-Ray Spectral Fitting Package) to analyze GBM Gamma-Ray Burst observations.
     
LAT Gamma-Ray
Burst Analysis
 Step-by-step example of using Xspec (X-Ray Spectral Fitting Package) to analyze LAT Gamma-Ray Burst observations.
     
 
LAT and GBM
Joint Spectral Analysis
Joint analysis with GBM (BGO and NaI) and LAT data.
     
Pulsar Analysis
Pulsar Analysis
Tutorial

Illustrates the flow of a basic pulsar analysis
     
 
Arrival Time
Correction
Uses gtbary tool to perform a barycentering time correction to an event file using spacecraft orbit files.
     
 
Period Search
 Search for pulsations in data known or suspected to have a pulsation of a known approximate period or frequency. (Not useful for a so-called blind period search, in which data are examined for pulsations at any frequency.)
     
 
Pulse Phase
Calculation
 Uses gtpphase tool to assign a pulse phase to each record in an event file, based on one or more known pulsar ephemerides.
     
 
Binary Orbital
Phase Calculation
Uses gtophase tool to assign an orbital phase to each record in an event file, based on one or more known pulsar ephemerides.
     
 
Ephemeris Computation
Utility
 Uses gtephem tool to present the user with the best ephemeris available in a pulsar database for a given pulsar and instant of time.
     
 
Ephemeris
Data File
Uses gtpulsardb utility to manipulate and access databases containing pulsar ephemeral data.
     
Observation Simulation
observationSim
 Step-by-step example of running the gtobssim application.
     
 
PulsarSpectrum Tutorial

Create a new pulsar from scratch, then simulate the pulsar using the PulsarSpectrum package's default emission model.

SciTools References button. When you click on the SciTools References button launches a 2nd-level navbar that has buttons for different types of references. Each of these buttons will launch its own 3rd-level navbar, providing ready access to various reference pages you may wish to consult while working with a given tutorial. When you click on the 'Open in New Window' button, the SciTools References functionality is opened in a popup window, which you may find convenient when working on a tutorial; if you click on the Pulsar button, the 3rd-level, Pulsar Tools navbar will be displayed.

Overview. For a brief overview of all of the SciTools References, see Overview: LAT Data Analysis Tools.

Note: You can click on the "Remove this navbar" button to remove a 3rd-level navbar.

Tips:

  • You can open the 2nd-level SciTools References navbar in a separate popup window at any time by clicking on either the name of the navigation bar (on the left), or on the "Open in New Window" button located on the right side of the navbar. (Both of these buttons are disabled in the popup windows to avoid spawning multiple popups
  • For convenience when working with the Pulsar Analysis Tutorial (which references each of the other tutorials on that navbar), you can open an additional popup window for the tutorials by clicking on the name of the 2nd-level "Pulsar Analysis" navbar. (Again to avoid spawning multiple popups, this button is disabled in the popup window.)

Data Access button. The green "Data Access" button will take you the green navbar section which will be used to introduce -- and provide links to -- a variety of data sources.

Site Map. For a consolidated view of the navbars and buttons located in this section, click on the Site Map. For convenience, the map is displayed in a separate window, and links are provided for each topic listed on the map. New pages added to a section are reported at the top of each map, and pages that have been changed recently are flagged with a red asterisk (*). (Our apologies; all of the workbook's site maps are out of date and are now under construction.)

glossary button. The glossary button provides access to a quick reference for many GLAST/Fermi terms and acronyms; more will be added as time permits.

Archives:

  

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Last updated on: 05/04/2012 by Heather Kelly