[u/mrichter/AliRoot.git] / T0 / AliT0CalibTimeEq.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
// class for T0 calibration                       TM-AC-AM_6-02-2006  
// equalize time shift for each time CFD channel
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include "AliT0CalibTimeEq.h"
#include "AliLog.h"
#include <TFile.h>
#include <TMath.h>
#include <TF1.h>
#include <TSpectrum.h>
#include <TProfile.h>
#include <iostream>

ClassImp(AliT0CalibTimeEq)

//________________________________________________________________
  AliT0CalibTimeEq::AliT0CalibTimeEq():TNamed(),
				       fMeanVertex(0),        
				       fRmsVertex(0)      
{
  //

}

//________________________________________________________________
AliT0CalibTimeEq::AliT0CalibTimeEq(const char* name):TNamed(),
				       fMeanVertex(0),        
				       fRmsVertex(0)      
{
  //constructor

  TString namst = "Calib_";
  namst += name;
  SetName(namst.Data());
  SetTitle(namst.Data());
}

//________________________________________________________________
AliT0CalibTimeEq::AliT0CalibTimeEq(const AliT0CalibTimeEq& calibda):TNamed(calibda),		
				       fMeanVertex(0),        
				       fRmsVertex(0)      
{
// copy constructor
  SetName(calibda.GetName());
  SetTitle(calibda.GetName());


}

//________________________________________________________________
AliT0CalibTimeEq &AliT0CalibTimeEq::operator =(const AliT0CalibTimeEq& calibda)
{
// assignment operator
  SetName(calibda.GetName());
  SetTitle(calibda.GetName());
 
  return *this;
}

//________________________________________________________________
AliT0CalibTimeEq::~AliT0CalibTimeEq()
{
  //
  // destrictor
}
//________________________________________________________________
void AliT0CalibTimeEq::Reset()
{
  //reset values

  memset(fCFDvalue,0,120*sizeof(Float_t));
  memset(fTimeEq,1,24*sizeof(Float_t));
}


//________________________________________________________________
void  AliT0CalibTimeEq::Print(Option_t*) const
{
  // print time values

  printf("\n	----	PM Arrays	----\n\n");
  printf(" Time delay CFD \n");
  for (Int_t i=0; i<24; i++) printf(" CFD  %f ",fTimeEq[i]);
  printf("\n Mean Vertex %f \n", fMeanVertex);
} 


//________________________________________________________________
Bool_t AliT0CalibTimeEq::ComputeOnlineParams(const char* filePhys)
{
  // compute online equalized time
  Float_t meandiff, sigmadiff, meanver, meancfdtime, sigmacfdtime;
  meandiff = sigmadiff =  meanver = meancfdtime = sigmacfdtime =0;
  Double_t rmsver=0;
  Int_t nent=0;
  Bool_t ok=false;
  gFile = TFile::Open(filePhys);
  if(!gFile) {
    AliError("No input PHYS data found ");
  }
  else
    {
      ok=true;
      for (Int_t i=0; i<24; i++)
	{
	  meandiff = sigmadiff =  meanver = meancfdtime = sigmacfdtime =0;
	  TH1F *cfd = (TH1F*) gFile->Get(Form("CFD1minCFD%d",i+1));
	  TH1F *cfdtime = (TH1F*) gFile->Get(Form("CFD%d",i+1));
	  if(!cfd) AliWarning(Form("no Diff histograms collected by PHYS DA for channel %i", i));
	  if(!cfdtime) AliWarning(Form("no CFD histograms collected by PHYS DA for channel %i", i));
	  if(cfd) {
	    nent = Int_t(cfd->GetEntries());
	    if(nent>500)  { 
	      if(cfd->GetRMS()>1.5 )
		GetMeanAndSigma(cfd, meandiff, sigmadiff);
	      if(cfd->GetRMS()<=1.5) 
		{
		  meandiff = cfd->GetMean();
		  sigmadiff=cfd->GetRMS();
		}
	      if(TMath::Abs(cfd->GetMean() - meandiff) >10 ) meandiff = cfd->GetMean(); 
	    }
	    else 
	      {
		ok=false;
		AliWarning(Form(" Not  enouph data in PMT %i- PMT1:  %i ", i, nent));
	      }
	    if(!cfd) AliWarning(Form("no CFD histograms collected by PHYS DA for channel %i", i));
	  }
	  //      printf(" i = %d buf1 = %s\n", i, buf1);
	  if(cfdtime) {
	    nent = Int_t(cfdtime->GetEntries());
	    if(nent > 500 )  { //!!!!!!!!!!
	      if(cfdtime->GetRMS()>1.5 )
		GetMeanAndSigma(cfdtime,meancfdtime, sigmacfdtime);
	      if(cfdtime->GetRMS()<=1.5) 
		{
		  meancfdtime = cfdtime->GetMean();
		  sigmacfdtime = cfdtime->GetRMS();
		}
	      if(TMath::Abs(cfdtime->GetMean() - meancfdtime) >20 ) meancfdtime = cfdtime->GetMean(); 
	    }
	  }
	  else 
	    {
	      ok=false;
	      AliWarning(Form(" Not  enouph data in PMT in CFD peak %i - %i ", i, nent));
	    }
	  printf(" %i %f %f %f %f \n",i, meandiff, sigmadiff, meancfdtime, sigmacfdtime);
	  SetTimeEq(i,meandiff);
	  SetTimeEqRms(i,sigmadiff);
	  SetCFDvalue(i,0,meancfdtime);
	  if (cfd) delete cfd;
	  if (cfdtime) delete cfdtime;

	}
      TH1F *ver = (TH1F*) gFile->Get("hVertex");
      if(!ver) AliWarning("no T0 histogram collected by PHYS DA ");
      if(ver) {
	meanver = ver->GetMean();
	rmsver = ver->GetRMS();
      }
      SetMeanVertex(meanver);
      SetRmsVertex(rmsver);
      
      gFile->Close();
      delete gFile;

    }
    return ok; 
}

//________________________________________________________________
Bool_t AliT0CalibTimeEq::ComputeOfflineParams(const char* filePhys, Float_t *timecdb, Float_t *cfdvalue, Int_t badpmt)
{
  // compute online equalized time
  Float_t meandiff, sigmadiff, meanver, meancfdtime, sigmacfdtime;
  meandiff = sigmadiff =  meanver = meancfdtime = sigmacfdtime =0;
  Double_t rmsver=0;
  Int_t nent=0;
  Bool_t ok=false;
  gFile = TFile::Open(filePhys);
  if(!gFile) {
    AliError("No input PHYS data found ");
    return ok;
  }
  else
    {

      meandiff = sigmadiff =  meanver = meancfdtime = sigmacfdtime =0;
      ok=true;
      TDirectory *dr = (TDirectory*) gFile->Get("T0Calib");
      if (!dr ) { AliError("No input T0calib found "); 
	return ok;
      }
      TObjArray * TzeroObj = (TObjArray*) dr->Get("fTzeroObject");
      for (Int_t i=0; i<24; i++)
	{
	  printf("@@@ were in OCDB before %f \n", timecdb[i]);
	  if (i != badpmt) {
	  TH1F *cfddiff = (TH1F*)TzeroObj->At(i);
	  TH1F *cfdtime = (TH1F*)TzeroObj->At(i+24);
	  if(!cfddiff) AliWarning(Form("no Diff histograms collected by PHYS DA for channel %i", i));
	  //      printf(" i = %d buf1 = %s\n", i, buf1);
	  if(!cfdtime) AliWarning(Form("no CFD histograms collected by PHYS DA for channel %i", i));
	  if(cfddiff) {
	    nent = Int_t(cfddiff->GetEntries());
	    if(nent>500 )  { //!!!!!
	      if(cfddiff->GetRMS()>1.5 )
		GetMeanAndSigma(cfddiff, meandiff, sigmadiff);
	      if(cfddiff->GetRMS()<=1.5) 
		{
		  meandiff = cfddiff->GetMean();
		  sigmadiff = cfddiff->GetRMS();
		}
	      if(TMath::Abs(cfddiff->GetMean() - meandiff) >10 ) meandiff = cfddiff->GetMean(); 
	      
	    }
	    else 
	      {
		ok=false;
		AliWarning(Form(" Not  enouph data in PMT %i- PMT1:  %i ", i, nent));
	      }
	  }	    
	  if(cfdtime) {
	    nent = Int_t(cfdtime->GetEntries());
	    if(nent>500 )  { //!!!!!
	      if(cfdtime->GetRMS()>1.5 )
		GetMeanAndSigma(cfdtime,meancfdtime, sigmacfdtime);
	      if(cfdtime->GetRMS()<=1.5) 
		{
		  meancfdtime = cfdtime->GetMean();
		  sigmacfdtime=cfdtime->GetRMS();
		}
	      if(TMath::Abs(cfdtime->GetMean() - meancfdtime) >20 ) meancfdtime = cfdtime->GetMean(); 
	    }
	    else 
	      {
		ok=false;
		AliWarning(Form(" Not  enouph data in PMT in CFD peak %i - %i ", i, nent));
	      }
	  }
	  SetTimeEq(i,timecdb[i] + meandiff);
	  SetTimeEqRms(i,sigmadiff);
	  SetCFDvalue(i,0,cfdvalue[i] );
	  if (cfddiff) delete cfddiff;
	  if (cfdtime) delete cfdtime;
	  } //bad pmt
	}
      TH1F *ver = (TH1F*) gFile->Get("hVertex");
      if(!ver) AliWarning("no T0 histogram collected by PHYS DA ");
      if(ver) {
	meanver = ver->GetMean();
	rmsver = ver->GetRMS();
      }
      SetMeanVertex(meanver);
      SetRmsVertex(rmsver);
      
      gFile->Close();
      delete gFile;

    }
    return ok; 
   }

//________________________________________________________________________
void AliT0CalibTimeEq::GetMeanAndSigma(TH1F* hist,  Float_t &mean, Float_t &sigma) {
  
  const double window = 2.;  //fit window 
  
  double meanEstimate, sigmaEstimate; 
  int maxBin;
  maxBin        =  hist->GetMaximumBin(); //position of maximum
  meanEstimate  =  hist->GetBinCenter( maxBin); // mean of gaussian sitting in maximum
  sigmaEstimate = hist->GetRMS();
  TF1* fit= new TF1("fit","gaus", meanEstimate - window*sigmaEstimate, meanEstimate + window*sigmaEstimate);
  fit->SetParameters(hist->GetBinContent(maxBin), meanEstimate, sigmaEstimate);
  hist->Fit("fit","RQ","Q");

  mean  = (Float_t) fit->GetParameter(1);
  sigma = (Float_t) fit->GetParameter(2);

  delete fit;
}
Commit	Line	Data
a2ad8166	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/* $Id$ */
	17
	18	///////////////////////////////////////////////////////////////////////////////
	19	// //
59b8a5fc	20	// class for T0 calibration TM-AC-AM_6-02-2006
59b8a5fc	21	// equalize time shift for each time CFD channel
a2ad8166	22	// //
	23	///////////////////////////////////////////////////////////////////////////////
	24
	25	#include "AliT0CalibTimeEq.h"
e47b556f	26	#include "AliLog.h"
a2ad8166	27	#include <TFile.h>
	28	#include <TMath.h>
	29	#include <TF1.h>
a2ad8166	30	#include <TSpectrum.h>
a2ad8166	31	#include <TProfile.h>
c61a7285	32	#include <iostream>
a2ad8166	33
	34	ClassImp(AliT0CalibTimeEq)
	35
	36	//________________________________________________________________
eef60a6a	37	AliT0CalibTimeEq::AliT0CalibTimeEq():TNamed(),
	38	fMeanVertex(0),
	39	fRmsVertex(0)
a2ad8166	40	{
a2ad8166	41	//
b95e8d87	42
a2ad8166	43	}
	44
	45	//________________________________________________________________
eef60a6a	46	AliT0CalibTimeEq::AliT0CalibTimeEq(const char* name):TNamed(),
	47	fMeanVertex(0),
	48	fRmsVertex(0)
a2ad8166	49	{
59b8a5fc	50	//constructor
59b8a5fc	51
a2ad8166	52	TString namst = "Calib_";
	53	namst += name;
	54	SetName(namst.Data());
	55	SetTitle(namst.Data());
	56	}
	57
	58	//________________________________________________________________
eef60a6a	59	AliT0CalibTimeEq::AliT0CalibTimeEq(const AliT0CalibTimeEq& calibda):TNamed(calibda),
	60	fMeanVertex(0),
	61	fRmsVertex(0)
a2ad8166	62	{
	63	// copy constructor
	64	SetName(calibda.GetName());
	65	SetTitle(calibda.GetName());
	66
	67
	68	}
	69
	70	//________________________________________________________________
	71	AliT0CalibTimeEq &AliT0CalibTimeEq::operator =(const AliT0CalibTimeEq& calibda)
	72	{
	73	// assignment operator
	74	SetName(calibda.GetName());
	75	SetTitle(calibda.GetName());
	76
	77	return *this;
	78	}
	79
	80	//________________________________________________________________
	81	AliT0CalibTimeEq::~AliT0CalibTimeEq()
	82	{
	83	//
59b8a5fc	84	// destrictor
a2ad8166	85	}
	86	//________________________________________________________________
	87	void AliT0CalibTimeEq::Reset()
	88	{
59b8a5fc	89	//reset values
59b8a5fc	90
a2ad8166	91	memset(fCFDvalue,0,120*sizeof(Float_t));
	92	memset(fTimeEq,1,24*sizeof(Float_t));
	93	}
	94
	95
	96	//________________________________________________________________
	97	void AliT0CalibTimeEq::Print(Option_t*) const
	98	{
59b8a5fc	99	// print time values
a2ad8166	100
	101	printf("\n ---- PM Arrays ----\n\n");
	102	printf(" Time delay CFD \n");
	103	for (Int_t i=0; i<24; i++) printf(" CFD %f ",fTimeEq[i]);
b95e8d87	104	printf("\n Mean Vertex %f \n", fMeanVertex);
a2ad8166	105	}
	106
	107
	108	//________________________________________________________________
02888358	109	Bool_t AliT0CalibTimeEq::ComputeOnlineParams(const char* filePhys)
a2ad8166	110	{
59b8a5fc	111	// compute online equalized time
1e7108ce	112	Float_t meandiff, sigmadiff, meanver, meancfdtime, sigmacfdtime;
c4ba15c3	113	meandiff = sigmadiff = meanver = meancfdtime = sigmacfdtime =0;
c4ba15c3	114	Double_t rmsver=0;
b5e0299c	115	Int_t nent=0;
02888358	116	Bool_t ok=false;
c2337900	117	gFile = TFile::Open(filePhys);
370867d2	118	if(!gFile) {
6318dd46	119	AliError("No input PHYS data found ");
	120	}
	121	else
	122	{
02888358	123	ok=true;
6318dd46	124	for (Int_t i=0; i<24; i++)
6318dd46	125	{
e691fec9	126	meandiff = sigmadiff = meanver = meancfdtime = sigmacfdtime =0;
1e7108ce	127	TH1F cfd = (TH1F) gFile->Get(Form("CFD1minCFD%d",i+1));
1e7108ce	128	TH1F cfdtime = (TH1F) gFile->Get(Form("CFD%d",i+1));
e691fec9	129	if(!cfd) AliWarning(Form("no Diff histograms collected by PHYS DA for channel %i", i));
612737bb	130	if(!cfdtime) AliWarning(Form("no CFD histograms collected by PHYS DA for channel %i", i));
eef60a6a	131	if(cfd) {
e691fec9	132	nent = Int_t(cfd->GetEntries());
612737bb	133	if(nent>500) {
612737bb	134	if(cfd->GetRMS()>1.5 )
e691fec9	135	GetMeanAndSigma(cfd, meandiff, sigmadiff);
	136	if(cfd->GetRMS()<=1.5)
	137	{
	138	meandiff = cfd->GetMean();
	139	sigmadiff=cfd->GetRMS();
	140	}
612737bb	141	if(TMath::Abs(cfd->GetMean() - meandiff) >10 ) meandiff = cfd->GetMean();
1e7108ce	142	}
	143	else
	144	{
f824d160	145	ok=false;
e691fec9	146	AliWarning(Form(" Not enouph data in PMT %i- PMT1: %i ", i, nent));
1e7108ce	147	}
e691fec9	148	if(!cfd) AliWarning(Form("no CFD histograms collected by PHYS DA for channel %i", i));
1e7108ce	149	}
612737bb	150	// printf(" i = %d buf1 = %s\n", i, buf1);
1e7108ce	151	if(cfdtime) {
e691fec9	152	nent = Int_t(cfdtime->GetEntries());
612737bb	153	if(nent > 500 ) { //!!!!!!!!!!
b5e0299c	154	if(cfdtime->GetRMS()>1.5 )
e691fec9	155	GetMeanAndSigma(cfdtime,meancfdtime, sigmacfdtime);
	156	if(cfdtime->GetRMS()<=1.5)
	157	{
	158	meancfdtime = cfdtime->GetMean();
	159	sigmacfdtime = cfdtime->GetRMS();
	160	}
612737bb	161	if(TMath::Abs(cfdtime->GetMean() - meancfdtime) >20 ) meancfdtime = cfdtime->GetMean();
1e7108ce	162	}
	163	}
	164	else
	165	{
e691fec9	166	ok=false;
	167	AliWarning(Form(" Not enouph data in PMT in CFD peak %i - %i ", i, nent));
	168	}
612737bb	169	printf(" %i %f %f %f %f \n",i, meandiff, sigmadiff, meancfdtime, sigmacfdtime);
1e7108ce	170	SetTimeEq(i,meandiff);
	171	SetTimeEqRms(i,sigmadiff);
	172	SetCFDvalue(i,0,meancfdtime);
1e7108ce	173	if (cfd) delete cfd;
	174	if (cfdtime) delete cfdtime;
	175
	176	}
	177	TH1F ver = (TH1F) gFile->Get("hVertex");
	178	if(!ver) AliWarning("no T0 histogram collected by PHYS DA ");
	179	if(ver) {
	180	meanver = ver->GetMean();
	181	rmsver = ver->GetRMS();
	182	}
	183	SetMeanVertex(meanver);
	184	SetRmsVertex(rmsver);
	185
	186	gFile->Close();
	187	delete gFile;
	188
	189	}
	190	return ok;
	191	}
	192
	193	//________________________________________________________________
612737bb	194	Bool_t AliT0CalibTimeEq::ComputeOfflineParams(const char* filePhys, Float_t timecdb, Float_t cfdvalue, Int_t badpmt)
1e7108ce	195	{
	196	// compute online equalized time
	197	Float_t meandiff, sigmadiff, meanver, meancfdtime, sigmacfdtime;
c4ba15c3	198	meandiff = sigmadiff = meanver = meancfdtime = sigmacfdtime =0;
c4ba15c3	199	Double_t rmsver=0;
1e7108ce	200	Int_t nent=0;
1e7108ce	201	Bool_t ok=false;
c4ba15c3	202	gFile = TFile::Open(filePhys);
1e7108ce	203	if(!gFile) {
1e7108ce	204	AliError("No input PHYS data found ");
612737bb	205	return ok;
1e7108ce	206	}
	207	else
	208	{
612737bb	209
e691fec9	210	meandiff = sigmadiff = meanver = meancfdtime = sigmacfdtime =0;
1e7108ce	211	ok=true;
612737bb	212	TDirectory dr = (TDirectory) gFile->Get("T0Calib");
	213	if (!dr ) { AliError("No input T0calib found ");
	214	return ok;
	215	}
	216	TObjArray * TzeroObj = (TObjArray*) dr->Get("fTzeroObject");
	217	for (Int_t i=0; i<24; i++)
1e7108ce	218	{
612737bb	219	printf("@@@ were in OCDB before %f \n", timecdb[i]);
b5e0299c	220	if (i != badpmt) {
1e7108ce	221	TH1F cfddiff = (TH1F)TzeroObj->At(i);
1e7108ce	222	TH1F cfdtime = (TH1F)TzeroObj->At(i+24);
e691fec9	223	if(!cfddiff) AliWarning(Form("no Diff histograms collected by PHYS DA for channel %i", i));
1e7108ce	224	// printf(" i = %d buf1 = %s\n", i, buf1);
612737bb	225	if(!cfdtime) AliWarning(Form("no CFD histograms collected by PHYS DA for channel %i", i));
1e7108ce	226	if(cfddiff) {
e691fec9	227	nent = Int_t(cfddiff->GetEntries());
612737bb	228	if(nent>500 ) { //!!!!!
612737bb	229	if(cfddiff->GetRMS()>1.5 )
e691fec9	230	GetMeanAndSigma(cfddiff, meandiff, sigmadiff);
	231	if(cfddiff->GetRMS()<=1.5)
	232	{
	233	meandiff = cfddiff->GetMean();
	234	sigmadiff = cfddiff->GetRMS();
	235	}
612737bb	236	if(TMath::Abs(cfddiff->GetMean() - meandiff) >10 ) meandiff = cfddiff->GetMean();
e691fec9	237
370867d2	238	}
370867d2	239	else
f824d160	240	{
f824d160	241	ok=false;
e691fec9	242	AliWarning(Form(" Not enouph data in PMT %i- PMT1: %i ", i, nent));
f824d160	243	}
e691fec9	244	}
1e7108ce	245	if(cfdtime) {
e691fec9	246	nent = Int_t(cfdtime->GetEntries());
612737bb	247	if(nent>500 ) { //!!!!!
b5e0299c	248	if(cfdtime->GetRMS()>1.5 )
e691fec9	249	GetMeanAndSigma(cfdtime,meancfdtime, sigmacfdtime);
	250	if(cfdtime->GetRMS()<=1.5)
	251	{
	252	meancfdtime = cfdtime->GetMean();
	253	sigmacfdtime=cfdtime->GetRMS();
	254	}
612737bb	255	if(TMath::Abs(cfdtime->GetMean() - meancfdtime) >20 ) meancfdtime = cfdtime->GetMean();
1e7108ce	256	}
e691fec9	257	else
e691fec9	258	{
1e7108ce	259	ok=false;
e691fec9	260	AliWarning(Form(" Not enouph data in PMT in CFD peak %i - %i ", i, nent));
1e7108ce	261	}
eef60a6a	262	}
b5e0299c	263	SetTimeEq(i,timecdb[i] + meandiff);
1e7108ce	264	SetTimeEqRms(i,sigmadiff);
593a6aab	265	SetCFDvalue(i,0,cfdvalue[i] );
1e7108ce	266	if (cfddiff) delete cfddiff;
1e7108ce	267	if (cfdtime) delete cfdtime;
b5e0299c	268	} //bad pmt
6318dd46	269	}
b95e8d87	270	TH1F ver = (TH1F) gFile->Get("hVertex");
f824d160	271	if(!ver) AliWarning("no T0 histogram collected by PHYS DA ");
eef60a6a	272	if(ver) {
	273	meanver = ver->GetMean();
	274	rmsver = ver->GetRMS();
	275	}
b95e8d87	276	SetMeanVertex(meanver);
eef60a6a	277	SetRmsVertex(rmsver);
6318dd46	278
	279	gFile->Close();
	280	delete gFile;
02888358	281
6318dd46	282	}
02888358	283	return ok;
e691fec9	284	}
a2ad8166	285
1e7108ce	286	//________________________________________________________________________
1e7108ce	287	void AliT0CalibTimeEq::GetMeanAndSigma(TH1F* hist, Float_t &mean, Float_t &sigma) {
612737bb	288
	289	const double window = 2.; //fit window
	290
1e7108ce	291	double meanEstimate, sigmaEstimate;
	292	int maxBin;
	293	maxBin = hist->GetMaximumBin(); //position of maximum
	294	meanEstimate = hist->GetBinCenter( maxBin); // mean of gaussian sitting in maximum
	295	sigmaEstimate = hist->GetRMS();
	296	TF1* fit= new TF1("fit","gaus", meanEstimate - windowsigmaEstimate, meanEstimate + windowsigmaEstimate);
	297	fit->SetParameters(hist->GetBinContent(maxBin), meanEstimate, sigmaEstimate);
b5e0299c	298	hist->Fit("fit","RQ","Q");
1e7108ce	299
	300	mean = (Float_t) fit->GetParameter(1);
	301	sigma = (Float_t) fit->GetParameter(2);
	302
	303	delete fit;
	304	}
	305
8bfd9a3e	306