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| term | definition | links | |||
|---|---|---|---|---|---|
| #FGL | A catalog of LAT point sources, which are objects in the sky that are bright in known to emit gamma rays over a long period periods of time. These are often active galaxies, supernova remnants, pulsars, and pulsar wind nebulae. So far, the LAT team has published the 1FGL (which used 11 months of LAT data) and 2FGL (2 years of LAT data). There is also a 0FGL (3 months of LAT data), also known as the Bright LAT source list. The Catalog group is currently working on 3FGL. (see also Catalog) | 0FGL page | |||
| 1FHL | A catalog of LAT point sources (objects in the sky that are known to emit gamma rays over periods of time) that are only detected above 10 GeV. (In contrast, most standard LAT analysis begins at 100 MeV.) The 1FHL used 3 years of LAT data. (see also Catalog) | 1FHL Confluence page | #FHL | ||
| #LAC | |||||
A
| term | definition | links |
|---|---|---|
| ACD | (Anti-Coincidence Detector) The ACD is the collection of scintillating tiles that detect charged particles, and is crucial to background rejection. The ACD covers the tracker (the part of the LAT that converts gamma rays into electron-positron pairs and then tracks these pairs' trajectories). Charged particles will also register as signals in the tracker, so the ACD is used to determine if a signal is actually a charged particle and not a gamma ray. If an ACD tile has a "hit" (detects a charged particle) that lines up with a signal, then that fact is used to "veto" the signal (i.e., declare that it's not a gamma ray). | |
| AGN (group) | (Active Galactic Nuclei) | AGN group page |
| ARR | (Autonomous Repoint Request) | |
| ATel | (Astronomer's Telegram) | |
| ATS | ||
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| term | definition | links |
|---|---|---|
| BA | (burst advocate) BAs keep an eye on gamma-ray burst activity. | BA Confluence page |
| back | ||
| back-converting | ||
| BGO | (bismuth germanate detector) | |
| blazar | ||
| BL Lac | ||
| boresight | ||
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