| Variable name | Meaning |
| Run | run number taken from DigiEvent.h |
| Event | event number taken from DigiEvent.h |
| GltWord | trigger word. Not valid for EM1 data as there were no GASU, should be valid for LAT integration data |
| EvtTime | Time stamp taken from DigiEvent.h, this may change when new LDF definition is available. |
| EvtSecond | event time |
| EvtNanoSecond | event time |
| EvtUpperTime | event time (this will change) |
| EvtLowerTime | event time (this will change) |
| EvtSummary | summary word for each event. For detailed explaination, see onLine document at http://www-glast.slac.stanford.edu/IntegrationTest/ONLINE/docs/LATcom.pdf, Chapter 3.5 |
Run and Event variable
| Variable name | Meaning |
| McSeqNo | sequence number |
| McId | PDG id for primary MC particle. For example: e-(11), e+(-11), gamma(22), mu-(13), mu+(-13) |
| McTotalEnergy | total energy of the particle including it's mass |
| McX0 | x coordinate of origin of the particle |
| McY0 | y coordinate of origin of the particle |
| McZ0 | z coordinate of origin of the particle |
| McXDir | true x direction of the primary particle |
| McYDir | true y direction of the primary particle |
| McZDir | true z direction of the primary particle |
| McConvPointX | x coordinate of photon conversion point |
| McConvPointY | y coordinate of photon conversion point |
| McConvPointZ | z coordinate of photon conversion point |
| McCalEneSum | MC sum of energies deposited in each crystal |
| McTkr1Ene | MC energy of first track if there is a pair production |
| McTkr2Ene | MC energy of second track if there is a pair production |
| McConvAngle | Opening angle of e+/e- pair if there is a pair production |
MC variable
| Variable name | Meaning |
| VtxX0 | x coordinate of first(best) vertex |
| VtxY0 | y coordinate of first(best) vertex |
| VtxZ0 | z coordinate of first(best) vertex |
| VtxXDir | x direction in first vertex. If there are two tracks associated with the vertex, then it is averged over direction of the two tracks; Otherwise, it is just direction of the track. |
| VtxYDir | y direction in first vertex. If there are two tracks associated with the vertex, then it is averged over direction of the two tracks; Otherwise, it is just direction of the track. |
| VtxZDir | z direction in first vertex. If there are two tracks associated with the vertex, then it is averged over direction of the two tracks; Otherwise, it is just direction of the track. |
| Vtx1NumTkrs | number of tracks associated with first vertex |
Vertex variable
| Variable name | Meaning |
| TkrNumDigis | number of TKR digis. Normally a digi is produced whenver there is a strip hit in a silicon plane. |
| TkrNumStrips[tower][layer][view] | A 3 dimension array which describes number of strips in every tower, layer and view. View=0 refers to measure X while View=1 refers to measure Y |
| tot[tower][layer][view][end] | A 4 dimension array which describes tot value at every tower, layer, view and end. End=0 refers to low end with stripId from 0 to 768 while end=1 refers to high end with stripId from 768 to 1536. Normally division is at middle of the plane, however this could be changed during real data taking. |
| totCorrL[tower][layer][view][end] | A 4 dimension array which describes corrected tot value at every tower, layer, view and end, using Hiro's linear correction formula. At the moment only valid for EM1 data. |
| totCorrQ[tower][layer][view][end] | A 4 dimension array which describes corrected tot value at every tower, layer, view and end, using Hiro's quadratic correction formula. At the moment only valid for EM1 data. |
| TkrNumClusters[tower][layer][view] | A 3 dimension array which describes number of clusters at every tower, layer and view. View=0 refers to measure X while View=1 refers to measure Y. |
| TkrNumTracks | number of reconstructed tracks |
| TkrNumVertices | number of reconstructed vertices |
| EvtEnergySumOpt | Energy stored in first vertex |
| Tkr1NumHits | number of clusters in first track |
| Tkr2NumHits | number of clusters in second track |
| Tkr1Chisq | chi square of first track |
| Tkr2Chisq | chi square of second track |
| Tkr1ChisqS | smoothed chi square of first track |
| Tkr2ChisqS | smoothed chi square of second track |
| Tkr1Rms | rms value of first track |
| Tkr2Rms | rms value of second track |
| Tkr1KalThetaMs | muiltiple scattering angle of first track calculated by Kalman filter |
| Tkr2KalThetaMs | muiltiple scattering angle of second track calculated by Kalman filter |
| Tkr1KalEne | energy of first track calculated by Kalman filter |
| Tkr2KalEne | energy of second track calculated by Kalman filter |
| TkrTopTot[tower] | A one dimension array which describes tot value at the top hit layer for each tower. The value is actually the maximum of 4 tot values at the biPlane. |
| Tkr1ConvTot[tower] | A one dimension array which describes tot value at the layer of the first vertex. The value is actually the maximum of 4 tot values at the biPlane. |
| TkrTp[tower][tp] | A two dimension array which describes tracker trigger primitive for each tower. For detailed description, please see onLine document at http://www-glast.slac.stanford.edu/IntegrationTest/ONLINE/docs/TEM.pdf, chapter 4.3 |
| TkrReq[tower][layer][view][end] | A 4 dimension array which describes tracker trigger request. For example: TkrReq[8][7][0][0]=1 means trigger request was sent from tower 8, layer 7, measure X and lower end of the tray. End=0 refers to low end with stripId from 0 to 768 while end=1 refers to high end with stripId from 768 to 1536. Normally division is at middle of the plane, however this could be changed during real data taking. |
TKR variable
| Variable name | Meaning |
| CalEneSum | sum of energies in each crystal |
| CalXEcentr | x coordinate of centroid of CAL cluster |
| CalXEcentr | x coordinate of centroid of CAL cluster |
| CalYEcentr | y coordinate of centroid of CAL cluster |
| CalZEcentr | z coordinate of centroid of CAL cluster |
| CalXtalEne[tower][layer][col] | measured energy in a single crystal at each tower, layer and column |
| CalMaxEne | maximal measured energy in a single crystal |
| CalNumHit[tower] | A one dimension array which describes number of crystals in each tower with measured energy larger than zero suppression threshold |
| CalTp[tower][tp] | A two dimension array which describes calorimeter trigger primitive for each tower. For detailed description, please see onLine document at http://www-glast.slac.stanford.edu/IntegrationTest/ONLINE/docs/TEM.pdf, chapter 4.3 |
| CalReq[tower][layer][end] | A 4 dimension array which describes calorimeter trigger request. For example: CalReq[8][7][0]=1 means trigger request was sent from tower 8, layer 7 and end 0. End=0 refers to low end with stripId from 0 to 768 while end=1 refers to high end with stripId from 768 to 1536. Normally division is at middle of the plane, however this could be changed during real data taking. |
CAL variable
