XMM-Newton Science Analysis System


xmmselect (xmmselect-2.67) [xmmsas_20230412_1735-21.0.0]

Typical usage scenarios

It is assumed xmmselect has been brought up to process a table in a data set, e.g.

xmmselect table=event.fits:RAW

The following is a collection of common scientific processing problems together with instructions on how to perform them within xmmselect:

• Generate a spectrum image or rate file without doing any selections and visualize it.
  1. Select two integer/real (image), or one integer (spectrum), or one real column (rate curve)
  2. Push the corresponding product extraction button at the bottom to extract and subsequently visualize the respective product.

• Generate a spectrum/rate curve from events stemming from a particular region in the FOV
  1. Select two integer/real columns
  2. Push the Image button at the bottom and wait until the corresponding image is displayed within an imgdisplay window
  3. Mark the region(s) in question within the imgdisplay window
  4. Push the 2D region button of xmmselect - a string will appear in the top expression entry field.
  5. Select an integer (spectrum) or a real (rate curve) column
  6. Push the Spectrum or Rate curve button at the bottom - the respective product shall be generated and visualized

• Identify the spatial distribution of events which account for a particular feature in a spectrum/rate curve
  1. Select an integer (spectrum) or a real (rate curve) column
  2. Push the Spectrum or Rate curve button at the bottom - the respective product shall be generated and visualized with dsplot
  3. Select one or multiple intervals in the displayed product
  4. Push the 1D region in the “Region selection” area
  5. Select two integer/real columns for the image extraction
  6. Push the Image button at the bottom and wait until the corresponding image is displayed within an imgdisplay window