The data file names are of the form (see Table 41 in the XMM Data Files Handbook):
| Group ID | File ID | Contents | File Type | View With |
| EPIC files | ||||
| CRSCOR | FCHART | Finding chart | Acrobat Reader | |
| ROSIMG | ROSAT image of region | Acrobat Reader | ||
| SNNNNN |
Source cross-correlation results | Zipped FITS | fv | |
| DNNNNN |
Catalog descriptions | Acrobat Reader | ||
| FNNNNN |
FOV cross-correlation result | Zipped FITS | fv | |
| ESKYIM | IMAGE_8 | Sky image 0.2 - 12.0 keV | Zipped FITS | ds9, Ximage, fv |
| IMAGE_1 | Sky image 0.2 - 0.5 keV | Zipped FITS | ds9, Ximage, fv | |
| IMAGE_2 | Sky image 0.5 - 2.0 keV | Zipped FITS | ds9, Ximage, fv | |
| IMAGE_3 | Sky image 2.0 - 4.5 keV | Zipped FITS | ds9, Ximage, fv | |
| IMAGE_4 | Sky image 4.5 - 7.5 keV | Zipped FITS | ds9, Ximage, fv | |
| IMAGE_5 | Sky image 7.5 - 12.0 keV | Zipped FITS | ds9, Ximage, fv | |
| EANCIL | EXPMAP_8 | Exposure map 0.2 - 12.0 keV | Zipped FITS, PNG | ds9, Ximage, fv, web browser |
| EXPMAP_1 | Exposure map 0.2 - 0.5 keV | Zipped FITS | ds9, Ximage, fv | |
| EXPMAP_2 | Exposure map 0.5 - 2.0 keV | Zipped FITS | ds9, Ximage, fv | |
| EXPMAP_3 | Exposure map 2.0 - 4.5 keV | Zipped FITS | ds9, Ximage, fv | |
| EXPMAP_4 | Exposure map 4.5 - 7.5 keV | Zipped FITS | ds9, Ximage, fv | |
| EXPMAP_5 | Exposure map 7.5 - 12.0 keV | Zipped FITS | ds9, Ximage, fv | |
| EEVLIS |
MIEVLI | MOS imaging mode event list | Zipped FITS | xmmselect, fv, Xselect |
| PIEVLI | PN imaging mode event list | Zipped FITS | xmmselect, fv, Xselect | |
| TIEVLI | PN, MOS timing mode event list | Zipped FITS | xmmselect, fv, Xselect | |
| ESRLIS | EBLSLI | Box-local detect source list | Zipped FITS | fv |
| EBMSLI | Box-map detect source list | Zipped FITS | fv | |
| EMSRLI | Max-like detect source list | Zipped FITS | fv | |
| OBSMLI | Summary source list | Zipped FITS, HTML | fv, web browser | |
| RGS files | ||||
| REVLIS | SRCLI_ | RGS Source Lists | Zipped FITS | fv |
| EVENLI | RGS Event lists | Zipped FITS | xmmselect, fv | |
| REXPIM | EXPMAP | RGS Exposure Maps | Zipped FITS | ds9, Ximage, fv |
| RSPECT | SRSPEC1 | 1st Order Source Spectra | Zipped FITS | Xspec, fv |
| SRSPEC2 | 2nd Order Source Spectra | Zipped FITS | Xspec, fv | |
| BGSPEC1 | 1st Order Source Spectra | Zipped FITS | Xspec, fv | |
| BGSPEC2 | 2nd Order Source Spectra | Zipped FITS | Xspec, fv | |
| SRSPEC | Spectra Plots | PDF format | Acrobat Reader | |
| RIMAGE | ORDIMG | Images, disp. vs. X-disp | Zipped FITS, PNG | ds9, Ximage, fv, web browser |
| IMAGE_ | Images, disp. vs. PI | Zipped FITS, PNG | ds9, Ximage, fv, web browser | |
| OM files | ||||
| OANCIL | SWSREG | OM Region File | ASCII text | text editor |
| OIMAGE | SIMAGE | OM Sky Image | Gzipped FITS | ds9, Ximage, fv |
| OMSLIS | SWSRLI | OM Source Lists | Zipped FITS | fv |
| OMSRTS | TSTRTS | Tracking Star Time Series | Zipped FITS | fv |