| ARC | Raw Arc frames; exposures of one or more arc lamps illuminating the whole field of view |
| ASTROMETRY | Raw Astrometry frames; exposures of astrometric fields. |
| BIAS | Raw Bias frames; taken with zero exposure time and closed shutter. |
| DARK | Raw Dark frames; taken with closed shutter. |
| FLAT | Raw Flat frames; exposures of continuum lamp illuminating the whole field of view |
| GuidingSystem | The Guiding System with the slow- and auto guide stars |
| ILLUM | Raw Illum frames; single optional raw attached-field field exposure |
| MASK | |
| OBJECT | Raw Object frames; exposures of science targets. |
| RawFits | The unsplit exposures, all other raws are generated from these |
| SKY | Raw Sky frames; exposures of (almost) empty sky fields. |
| SKYFLAT | Raw SkyFlat frames; exposures of the twilight sky. |
| STD | Raw Standard-star frames; exposures of standard star fields. |
| Uncategorized | These exposures could not be categorized as one of the default raw classes |
