| creation_date | datetime | The creation date of the object | |
| DATE_OBS | datetime | UTC date on which the data of this file were obtained. | |
| extnames | str | The EXTNAMEs of the SGS fits extensions | |
| filename | str | The name of the associated file | |
| globalname | str | The name used to store and retrieve file to and from Storage | |
| guide_stars | SGSGuideStar | The guide stars used in the slow guiding system | |
| nr_sgs_extensions | int | The number of fits SGS extensions | |
| observation_type | str | The type of the observation | |
| sources | SGSGuideStar | The guide stars used in the slow guiding system | |
