| Attribute name | Attribute type | Docstring | Unit |
| creation_date | datetime | The datetime this objects was created | |
| ESO_QC_BIAS_MASTER_NBADPIX | int | Bad pixels found as part of the bad column search in the master bias | |
| ESO_QC_BIAS_MASTER_NSATURATED | int | Number of saturated pixels in output data | |
| object_id | oidtype | The object identifier
The object identifier is an attribute shared by all persistent instances. It is the prime key, by which object identity is established | |
| parameterized | QCpar_MASTER_BIAS | Link to the list of parameterized QC attributes | |