This page is far from being complete. While I give an introduction to my students, I try to write down a few notes, hoping that it can serve as a small introduction and help future students.

Analysis Steps

callisto

what is done?

calculation of calibration constants, extraction of signal, calibration of data

macro

Mars/fact/analysis/callisto.C

input

sequence file, rawdata (files found with information in sequence file

output

YYYYMMDD_SSS-calibration.root (plots), YYYYMMDD_FFF_C.root (one per run)

star

what is done?

image cleaning, calculation of image parameter

macro

Mars/fact/analysis/star.C

input

sequence file, callisto output

output

YYYYMMDD_SSS-images.root (plots), YYYYMMDD_FFF_I.root (one per run)

merpp

what is done?

merge auxiliary information to data

macro

Mars/fact/analysis/merpp.C

input

sequence file, YYYYMMDD_FFF_I.root

output

YYYYMMDD_FFF_I.root (one per run)

ganymed

what is done?

background suppression, calculation of excess(, energy reconstruction)

macro

Mars/fact/analysis/ganymed.C

input

dataset file, star output (_I.root files)

output

name-analysis.root (result, eventlist after cuts, plots), name-summary.root (event list before cuts)

lightcurve

what is done?

calculation of excess rate

macro

Mars/fact/analysis/lightcurve.C

input

several datasets or information from DB

additional information

sequence

a sequence of runs, consisting of: pedestal run, light pulser run, one or more data runs

dataset

a collection of data runs

YYYYMMDD

night (date of sunset is used)

FFF

file number (starts with 0 every night

SSS

sequence number (number of first run in sequence)

dataset file

a dataset file is a simple text file containing one or more lines as e.g.

/path_to_imageparameter_file YYYYMMDD_FFF_I.root

be aware that there is a space between the path and the file name

in the filename wildcards can be used

technical information

how to start a macro

go to Mars directory
start root
.x path/macro.C ("with maybe some variable", 2)

set ROOT environment

source /path_to_ROOT/bin/thisroot.sh

rawdata in wü

/fact/raw/YYYY/MM/DD/YYYYMMDD_FFF.fits.fz

callisto in Wü

/scratch/local/dorner/data.2013.05.11/callisto/YYYY/MM/DD/ (temporary path, will be changed)

star in Wü

/scratch/local/dorner/data.2013.05.11/star/YYYY/MM/DD/ (temporary path, will be changed)

sequences in Wü

/scratch/local/dorner/sequences/YYYY/MM/DD/ (temporary path, will be changed)

exercises A

1. run callisto for a sequence (check the macro to find out how to call the macro)
2. run star for the same sequence
3. run merpp for the same sequence
4. write a dataset file
5. run ganymed for this dataset file

Data Check