Changes between Version 1 and Version 2 of IngredientsSpectrum

Timestamp:

06/01/18 10:07:01 (7 years ago)

Author:

Daniela Dorner

Comment:

continued tutorial

IngredientsSpectrum

@@ -2 +2 @@
 However please keep in mind that this is far from being complete, might contain information that is valid only now and that it has not been checked for mistakes. 
 
-== Ingredients == 
+remark: this tutorial is referring to Mars from June 2018 (rev 19018)
+
+= Ingredients =
 
 * energy-estimator
@@ -9 +11 @@
 * macro to calculate spectrum 
 
-== Basic Steps and Rules == 
+= Basic Steps and Rules =
 
 1. Prepare ingredients
@@ -20 +22 @@
 1. run ganymed for data and MC
 1. run macro for spectrum
+
+= Energy Estimator =
+
+To estimate the energy there are different methods. E.g. you can use neutral nets or random forrest. Here I will refer to the very basic approach of an energy parametrization. 
+
+Once you have an energy estimator, you implement it in ganymed e.g. like this: 
+https://trac.fact-project.org/browser/trunk/Mars/fact/analysis/mc/ganymed.C?rev=17733#L169
+
+== Get Energy Parametrization ==
+
+To get an energy parametrization, you may plot image parameters vs MC-energy and use https://trac.fact-project.org/browser/trunk/Mars/macros/optim/optimenergy.C to optimize the coefficients. 
+
+The macro in the svn contains a very basic example using only the image parameter Size in the parametrization. 
+
+Start with this and then add more image parameters. 
+
+== more image parameters ==
+
+To find out which other parameters to use and which formula to use, plot the residual (Emc - Eest) versus an image parameter of your choice. 
+
+For example you can plot the image parameters like this: http://www.astro.uni-wuerzburg.de/wikineu/index.php/How_to_plot_image_parameters
+
+To get an idea which other image parameters are available, you may look at the classes MHillas.cc MHillasExt MHillasSrc MImagePar MNewImagePar MNewImagePar2 in https://trac.fact-project.org/browser/trunk/Mars/mimage Not all of them might be relevant for FACT, but for most of them you can find a description in the class. 
+
+Parameters relevant for the energy estimation: Size, Zd, Leakage, Dist and maybe some others. 
+
+An example for plots and energy parametrization here: https://www.fact-project.org/logbook/showthread.php?tid=4695
+
+== optimenergy.C ==
+
+As input you need a MC ganymed file. 
+
+The parametrization is defined in 
+{{{
+#!cpp 
+char *r = "[0]*M[0]";  
+}}}
+
+With 
+{{{
+#!cpp 
+opt.AddParameter("MHillas.fSize");
+}}}
+further image parameters are added. 
+
+You can also change the slope and add cuts. 
+
+More examples can be found at ISDC in /home/isdc/dorner/e_est/optimenergy.C 
+
+== Spectrum == 
+
+A macro to get a spectrum can be found at /home/isdc/dorner/get_spectrum/spectrum.C
+
+remark: so far it does not yet calculate errors. 
+
+Input: ganymed files from data and MC 
+
+== Consistent Processing of MC and data == 
+
+[tbc]