This lecture series was originally designed to help graduate students interested in jet reconstruction, the main focus of my first attempt on this educational endeavour, learning the basics of the discussed subjects in general and specifically accelerating their integration into the related physics and performance studies for the ATLAS experiment. The potentially interested audience meanwhile extended not only to more senior colleagues from the experiments but also to colleagues from theory and phenomenology who found it useful to attend the lectures. I am planning on maintaining and updating the material in case of new experimental or theoretical insight into jet reconstruction, and I am also planning on extensions including missing transverse energy reconstruction.

A small software package smearing particle energy radially with respect to the direction of flight, thus simulating the energy spread introduced by electromagnetic and hadronic showers in calorimeters. Detector envelopes and shower sizes can be set up by the client. The default is an ATLAS-like setup with Gaussian radial profiles. Improvements can include more realstic exponentially falling profiles with core and margin slopes, and a better treatment in the transition between electromagnetic and hadronic calorimeters. The software uses the FastJet event data model and standard C++ headers. No warranty whatsoever when using this code!