XMM-Newton Science Analysis System
xmmselect (xmmselect-2.67) [xmmsas_20211130_0941-20.0.0]
This is the area at the bottom of the main window and consists
of seven horizontally arranged buttons labeled Filtered Table,
Fix Expression, Image,
Histogram, OGIP spectrum, OGIP Rate Curve, and
OGIP Spectral Products respectively. Pushing either
of these will trigger the following actions:
A prerequisite to the extraction of images, histograms, spectra, and rate
is the selection of data set columns which define the primary product
axes (see above). This is done
with the check buttons left to each push button in the middle.
The leftmost check button column corresponds to the image extraction.
Two and only two data set columns can be selected which defines these
columns as image axes. When a column is selected in this way the
associated check button will be labeled with either of the letter
“X” or “Y” when being pushed. “X” is the axis which is displayed
horizontally by imgdisplay.
The attempt to select a third column will result
in the last selected one getting unselected again. Trying to perform
an image extraction without a prior column selection will result
in an error condition. For histogram, spectrum, and rates curve extractions
the user has to select one and only one data column with the
rightmost check button column. These act as “radio” buttons, i.e.
pushing a button will undo the previously made choice (if any has been
made yet). As for images, trying to extract a histogram, spectrum or rates
curve without a prior axis selection will lead to an error condition.
- Execution of evselect with the selection expression
in the top
expression entry field. Before evselect is actually executed,
its parameter dialog is presented which gives the user full control
over the product extraction process, i.e., all of evselect's parameters
(e.g. bin size for rates curve extraction, name of output data set, etc.)
can be altered.
- Accumulation of the respective product with a default name
- Except for event lists, execution of a product displayer
(either dsplot or imgdisplay) with the name of the generated product
If an image, histogram, spectrum or rate curve has been successfully generated
and displayed, the user can define one and two dimensional
regions which xmmselect will translate into a proper boolean selection
expression for a subsequent refined product generation.
XMM-Newton SOC -- 2021-11-30