2004 Cross Talk Analysis




Summary of 2004 Cross Talk Analysis:

The cross-talk analysis for AMANDA strings 5-10 was done using T0 data from the 03-04 South Pole season taken in November and December of 2003 by Elisa Bernardini and Mike Walter. The data is currently maintained on pub.ifh.de. Please refer to the T0 DESY website for more information on the T0 callibration. Click here for a list of the runs and associated data files used from the T0 callibration for this cross-talk analysis.The cross-talk constants were obtained by fitting the ADC-TOT curves for each OM using the PAW kumac contained in xt_2000 as part of the xt-filt software package developed and maintained by Ignacio Taboada. Because T0 data was only taken for a limited number of OM's in the 03-04 season, many of the OM's were fit using down-going muon data in place of T0 data. An explanation of this can be found below in the Problems Encountered section.


Data Processing Specifics (ADC-TOT Fits):

The raw data files were processed on the icecube.berkeley.edu server at Berkeley. The following were the steps taken in reading and filtering the raw data:

  1. convert raw data from binary format to f2k format using the AMANDA raw data reader (v2.4) with 2002 detector settings-
  2. amanda:~/data/ amorey> reader.2.4 -i file.bin.gz -f file.f2k --run-period=2002

  3. calibrate the f2k data file for detector geometry using amacalib (Siegmund softare package)-
  4. amanda:~/data/ amorey> amacalib -L -P -T -D ~/xt-filt/omdb-00-20010926.amacalib.txt file.f2k.gz -o calib.file.f2k.gz

  5. remove fake OM hits (data from OM's numbered 9000-9009 or 10000-10999) using grep-
  6. amanda:~/data/ amorey> zcat calib.file.f2k.gz | grep -v "HT 9[0-9][0-9][0-9]" | grep -v "HT 1[0-9][0-9][0-9][0-9]" | gzip -c > clean.calib.file.f2k.gz

  7. convert f2k file format to hbook format using munt (Siegmund software package)-
  8. amanda:~/data/ amorey> munt -K -O clean.calib.file.hbook clean.calib.file.f2k.gz >& /dev/null


ADC-TOT fits:

The ADC-TOT curves for the T0 data were fit using a PAW kumac created by Ignacio Taboada. Each graphic shows the points chosen to represent the ADC-TOT edge, the best-fit curve, the standard TOT cut-off, and the actual ADC-TOT curve which will be used in cross-talk cleaning. Below is an example of an ADC-TOT curve fit:

Below is a complete list of the fit status for each OM along with graphic files showing the best-fit curves. Some of the OM's were fit with the available T0 data while many of the OM's were fit using down-going muon data. Please see the Problems Encountered section for a more detailed description of the issues encountered in fitting the ADC-TOT curves.


2004 Cross Talk Constants:

The cross-talk constants are finished. Please refer to the Problems Encountered section for a discussion of the problems encountered and the solutions provided. Click on the link below for a text file containing the constants in their standard format.


Problems Encountered:

  1. Dead OM's (click here for a complete list of OM status as of April, 2004):

  2. The OM's listed above show up as "dead" in the ADC-TOT Curve Fits and with 0's for their Cross-Talk Constants.


  3. Live OM's fit with down-going muon data:

  4. T0 data was not taken for all channels in strings 5-10 so In place of T0 data, I used muon data from April 14-16, 2004 (run numbers 7863, 7864, and 7865) to fit the ADC-TOT curves. Please refer to the adc-tot fit curves to see which OM's were fit with muon data.


  5. The T0 data was read using the AMANDA raw data reader with 2002 settings. As of 7/25/05, the 2003 or 2004 detector settings for the reader were not available.



  6. Last updated Thursday, August 8, 2005.