LAT Science Products

See:

On this page, see:

In Confluence, see:

Note: During the first year after the launch (i.e., until 06/12/2009), while the instrument is being calibrated and operational procedures are being refined, LAT Science Data Products will be generally available only to members of the GLAST Collaboration.

LAT Science Products include:

  • Level 1 (FT1) data

Subsets of photon event files containing information (arrival time, apparent energy, direction, etc.) required by analysis tools.

Generated by the ISOC and distributed to the user community by the Glast Science Support Center (GSSC). SLAC also provides access to this data by means of the GLAST Data Portal Catalog to members of the collaboration.
  • Level 2 (FT2) data

Satellite position, orientation, and livetime data files; also required by analysis tools.

Generated by the ISOC and distributed to the user community by the Glast Science Support Center (GSSC). SLAC also provides access to this data by means of the GLAST Data Portal to members of the collaboration.

  • Automated Science Processing (ASP) products

See: ASP Data Viewer tool. Provides a "Quick Look" at LAT data in order to alert the scientific community of time-critical transient events (gamma-ray bursts and other transient sources). Also provide light curves for a predefined list of sources.

LAT ASP Products

The ISOC will facilitate time-critical follow-up and multi-wavelength observations of transient sources by processing techniques to process data from the satellite as soon as they are available from the ground processing pipeline.

ASP Task Contents Delivery Method
GRB position refinement using LAT data GRB position and error, date, time of day, and fluences or upper limits in 3 bands.

GCN Notice;
Website

Blind search for GRBs in Level-1 data GRB position and error, date, time-0f-day, and fluences or upper limits in 3 bands. GCN Notice;
Website
GRB afterglow detection and analysis Flux estimates on various time scales, hardness or spectral index estimates; refined position and errors GCN Circular;
Website
Monitoring of the LAT Design Review Program's (DRP's) "Sources-of-Interest" FITS files and plots of flux on 1 day and 1 week intervals in 3 bands; photon index for E > 100 MeV; 1 sigma unc. or 2 sigma U.L.s Website
Flare detection of newly-flaring, bright sources Coordinates, ID, flare onset and duration (if known), plots of light curve in 3 bands E-mail notifications;
Website

For a description of the design of ASP and its scientific products, and results of a prototype implementation, see Automated Science Processing for GLAST LAT Data.

Last updated by: Chuck Patterson 11/13/2008