| bias | BiasFrame | The BiasFrame used to debias the raw frames | |
| chip | Chip | Information about the chip | |
| cold | ColdPixelMap | A ColdPixelMap object | |
| creation_date | datetime | Date this object was created | |
| filename | str | The name of the associated file | |
| filter | Filter | Information about the filter | |
| gain | GainLinearity | A GainLInearity object | |
| globalname | str | The name used to store and retrieve file to and from Storage | |
| hot | HotPixelMap | A HotPixelMap object | |
| imstat | Imstat | Image statistics for the frame | |
| instrument | Instrument | Information about the instrument | |
| is_valid | int | Manual/external flag to disqualify bad data (SuperFlag) | |
| NAXIS1 | int | Length of data in axis 1 | pixel |
| NAXIS2 | int | Length of data in axis 2 | pixel |
| observing_block | ObservingBlock | Information about the observing block | |
| process_params | TwilightFlatFrameParameters | Processing parameters | |
| process_status | int | A flag indicating the processing status | |
| quality_flags | int | Automatic/internal quality flag | |
| raw_twilightflat_frames | RawTwilightFlatFrame | A list of TwilightFlatFrames used to construct this frame | |
| template | Template | Information about the template | |
| timestamp_end | datetime | End of valid period | |
| timestamp_start | datetime | Start of valid period | |
