COMPTEL interface

Overview

The COMPTEL module provides an instrument interface for the COMPTEL telescope that has been operated on the Compton Gamma-Ray Observatory (CGRO) from 1991 to 2000.

The following figure presents an overview over the C++ classes of the COMPTEL module and their relations.

The central object is a COMPTEL observation, implemented by the :doxy:`GCOMObservation` class. The class either holds a COMPTEL event cube, implemented by the :doxy:`GCOMEventCube` class, or an event list, implemented by the :doxy:`GCOMEventList` class. A single bin of the event cube is implemented by the :doxy:`GCOMEventBin` class, a single event by the :doxy:`GCOMEventAtom` class.

The :doxy:`GCOMEventCube` class uses the general :doxy:`GCOMDri` class to store the data. :doxy:`GCOMDri` implements a general three-dimensional data-space of COMPTEL, spanned by the scatter direction \chi and \Psi and the scatter angle \bar{\varphi} . This three-dimensional coordinate is implemented by the :doxy:`GCOMInstDir` class. The :doxy:`GCOMDri` class further stores the selection sets, implemented by the :doxy:`GCOMSelection` class.

The :doxy:`GCOMObservation` class further holds COMPTEL Good Time Intervals, implemented by the :doxy:`GCOMTim` class, and Orbit Aspect Data, implemented by the :doxy:`GCOMOads` container class that holds records of :doxy:`GCOMOad`.

The module also provides a :doxy:`GCOMIaq` class that enables computation of instrument response functions. The computation is based on the D1 and D2 detector response functions, that are accessed via the :doxy:`GCOMD1Response` and :doxy:`GCOMD2Response` classes. Instrument characteristics that are also required for the computation are access via the :doxy:`GCOMInstChars` class.

So far a single COMPTEL background model exists, that performs \bar{\varphi} of a DRI model cube. This model is implemented by the :doxy:`GCOMModelDRBFitting` class.

Finally, the :doxy:`GCOMStatus` class holds instrument status information.