21 Feb 2007
Several of us (Chris Shrader, David Band, Tom Stephens, Rob Cameron, Eduardo do Couto e Silva, Richard Dubois, and me at least) met informally during the GLAST Symposium and one of the main topics of discussion was resolving the status of the science data products that we plan for the LAT data. Some data products envisioned early on are no longer relevant. Here's a summary of the products and what was agreed on at the Symposium.
The numbering and naming are from the draft ICD for Science Data Products that David has been maintaining; see the GSSC's documents-in-development page. In case you are paying attention, the pulsar ephemeris database, used by the Science Tools, is not a LAT science data product - it will come from the GSSC.
| LS- | Data product | Decision reached |
| 001 | LAT Events | Still not clear whether this is every single event and whether it is the full Merit ntuple, or possibly more than that, and what people might do with it. |
| 002 | LAT Photons (FT1) | Remains important |
| 003 | LAT Low-Level Calibration | Eliminate (info is made available via MOOT/MOOD) |
| 005 | LAT Pointing & Livetime History (FT2) | Remains important |
| 006 | LAT Configuration History | Eliminate (had notionally become a high-level diagostic |
| 007 | LAT Transient Data | Eliminate (had been kind of a summary data product; but see below) |
| 008 | LAT Point Source Catalog | Remains important |
| 009 | LAT Burst Catalog | GRB SWG says that it will make this, some details TBD |
| 010 | Interstellar emission model | Remains important |
| 011-013 | IRFs (Energy dispersion, Aeff, PSF) | Remain important, specific definitions are subject to change |
In addition, livetime cubes will now be considered to be a science data product, that is something that the LAT team delivers to the GSSC.
Other interesting data product questions remain, including (as has recently been pointed out) managing the pointing history file(s) - users generally won't need or want a whole >1 yr long file - and the potential array of products from Automated Science Processing (images, tables). The latter had until recently been considered something that would not formally be delivered to the GSSC. Now it seems more likely that they will be 'delivered' (or possibly made available via linking in to a LAT team Web site).