XMM-Newton Science Analysis System


rgsregions (rgsregions-1.23) [xmmsas_20230412_1735-21.0.0]

Output Files

• srclist

  The region extensions added to the source list comply with the “ASC FITS File Designers' Guide” specifications. Some non-standard attributes are also provided with every region:

  PROTECT	protected from routine replacement
  SPACING	number of vertices across each node
  PIX_ENCL	number of pixels enclosed
  PIX_AREA	area of a pixel (units vary)

  Additionally, the non-standard COVERAGE attribute is provided for order regions and the spatial background region, and the non-standard pair, COVBELOW$^{\dag }$ and COVABOVE$^{\dag }$, is provided for image regions. These document the percentages used in constructing the regions. Unless protected, existing versions of the regions may be overwritten if they are not compatible with the given parameters. The regions are of four kinds:

  • spatial background region$^{\dag }$

    RGS $<\!\!instrument\ number\!\!>$_BACKGROUND

    There is only one extension of this kind. In addition to the attributes described above, the list of source identifiers for the image regions excluded from the background is also provided as EXCLSRCS.

  • image regions

    RGS $<\!\!instrument\ number\!\!>$_SRC $<\!\!source\ identifier\!\!>$_SPATIAL

    There is one extension of this kind for each selected source. In HTR mode the inapplicable attributes SPACING, COVBELOW and COVABOVE are omitted.

  • order regions

    RGS $<\!\!instrument\ number\!\!>$_SRC $<\!\!source\ identifier\!\!>$_ORDER_ $<\!\!reflection\ order\!\!>$

    There is one extension of this kind for each requested order, for each selected source.

  • order background regions$^{\ddag }$

    RGS $<\!\!instrument\ number\!\!>$_SRC $<\!\!source\ identifier\!\!>$_ORD $<\!\!reflection\ order\!\!>$_BKG

    There is one extension of this kind for each requested order, for each selected source.