As for the eROSITA Science Analysis Software System (eSASS) released during the Early Data Release (EDR), the eSASS4DR1 tasks work on the command line. Each task can be executed using a set of parameters, which are specified on the command line. To access the list of parameters that a given eSASS task accepts, the plist command can be called followed by the task's name. Just as the tasks in other X-ray data analysis software, most parameters in the tasks have default values, some parameters are capable of handling complex expressions, and some parameters have child parameters, i.e. parameters that are activated depending on the value of the parent parameter.
In the following, a list of the eSASS4DR1 users' release tasks can be found, together with a short description of each. Click on the respective task name to access detailed information about each task. The task descriptions are also provided within the eSASS4DR1 package.
radec2xy: calculates sky pixel coordinates given an R.A. and Dec. evatt: calculates equatorial sky coordinates for each photon event in a given photon event list. flaregti: creates flare good-time-interval extensions which can be used to filter flares from a dataset. ebarycen: applies a barycentric correction to the time values in the event list and the corresponding GTI extensions. evtool: manipulate event files (pattern and flag selection, good time intervals application) and create images for survey or pointed observations of one or several eROSITA telescopes and energy bands. expmap: computes exposure maps for survey or pointed observations of one or several eROSITA telescopes and energy bands. ermask: evaluates an exposure map and calculates a detection mask according to user conditions. erbackmap: creates the background images for the source detection pipeline. ersensmap: calculate the expected detection sensitivity for point sources or extended sources. erbox: searches the input images for sources that are brighter than the expected background fluctuations at a given image position. ermldet: determines source parameters for a list of input sources. catprep: convert the output of ermldet into the catalogue file format with one source per row.