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| term | definition | link |
|---|---|---|
| dec | (declination) | http://en.wikipedia.org/wiki/Declination |
| diffuse (group) | Diffuse group page | |
| diffuse (event class) | In previous versions of the LAT data, the diffuse event class was the event class with the most stringent cuts on background. However, the "diffuse" name is no longer used. | |
| DM (group) | (Dark Matter) | DM group link |
| DQM | (Data Quality Monitor) Also known as "datamon." A DQM is the LAT member whose duty it is to monitor the spacecraft's automatic plots and diagnostics to make sure all is well. If all is not well, the DQM's task is to alert the experts, who can take a closer look. DQM shifts last for one week at a time. | DQM information page |
| ds9 | (Deep Space 9 (seriously)) ds9 is a piece of software that is used for data visualization and imaging. For instance, someone analyzing Fermi data might use ds9 to look at a counts map (a map of where the photons that Fermi observed came from). | http://ds9.si.edu/site/Home.html |
| DRP | ||
| dSph | (dwarf spheroidal galaxy) |
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| term | definition | link |
|---|---|---|
| MC | (Monte Carlo) | |
| merit / merit file | ||
| MET | (Mission Elapsed Time) Many missions record times in MET, which is the number of seconds since January 1, 2001. | A tool for converting from MET to dates |
| MIP | (minimum ionizing particle) | |
| MOC | ||
| MSP | (millisecond pulsar) | |
| MW | (multiwavelength) |
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| term | definition | link |
|---|---|---|
| RA | (right ascension) | http://en.wikipedia.org/wiki/Right_ascension |
| ROI | (region of interest) The ROI is the region of space that is being analyzed. A typical ROI for an individual source (such as a pulsar or a gamma-ray burst) is 10 or 12 degrees, although the exact size can differ and depends on the many factors. | |
| ROOT, .root file | ROOT is an object oriented software package built on C++ by particle physicists at CERN to analyze large amounts of data. The Merit files are root files and require ROOT to read the data from said file. | http://root.cern.ch/drupal/ |
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