Changeset 9845 for trunk/Mars/NEWS


Ignore:
Timestamp:
08/11/10 17:05:32 (14 years ago)
Author:
tbretz
Message:
Implemented new parameters to describe the time spread in MHillasExt.
File:
1 edited

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  • trunk/Mars/NEWS

    r9822 r9845  
    5151     ns anymore, but in ns/deg. This means that the values for MAGIC
    5252     have to be scaled by a factor of 10.
     53
     54   * Star now calculates new timing parameters, namely:
     55
     56   ** MHillasExt.fTimeSpread:
     57      This is the time spread (rms) around the mean of the arrival times.
     58      It is calulated as
     59         <math>\sqrt{\sum{t_i}/n}</math>
     60   ** MHillasExt.fTimeSpreadWeighted:
     61      This is the weighted time spread (rms) around the weighted mean of the arrival times.
     62      It is calulated as
     63         <math>\frac{1}{\sum{n_i}}\sqrt{\sum{n_i^2(t_i-<wt>)^2}}}</math>
     64            or
     65         <math>\frac{1}{\sum{n_i}}\sqrt{\sum{n_i^2t_i^2}+<wt>^2\sum{n_i^2}-2<wt>\sum{t_in_i^2}}</math>
    5366
    5467 ;trainenergy.C:
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