| astrom | Astrom | Information about the astrometry | |
| CDELT3 | float | The partial derivative of the coordinate with respect to the pixel index | |
| CDELT4 | float | The partial derivative of the coordinate with respect to the pixel index | |
| creation_date | datetime | Date this object was created | |
| CROTA3 | float | Rotation from the standard coordinate system | |
| CROTA4 | float | Rotation from the standard coordinate system | |
| CRPIX3 | int | The reference point | |
| CRPIX4 | int | The reference point | |
| CRVAL3 | float | The value of the coordinate at the reference point | |
| CRVAL4 | float | The value of the coordinate at the reference point | |
| CTYPE3 | str | The name of the coordinate represented by axis | |
| CTYPE4 | str | The name of the coordinate represented by axis | |
| CUNIT3 | str | The unit of third axis | |
| CUNIT4 | str | The unit of fourth axis | |
| DATE_MAP | datetime | Date of making the map | |
| DATE_OBS | datetime | Date of the observation of the frame | |
| EPOCH | str | Epoch | |
| filename | str | The name of the associated file | |
| globalname | str | The name used to store and retrieve file to and from Storage | |
| instrument | Instrument | Information about the instrument | |
| is_valid | int | Manual/external flag to disqualify bad data (SuperFlag) | |
| NAXIS | int | Number of axes | |
| NAXIS1 | int | Number of pixels on axis 1 (RA) | |
| NAXIS2 | int | Number of pixels on axis 2 (DEC) | |
| NAXIS3 | int | Number of pixels on axis 3 | |
| NAXIS4 | int | Number of pixels on axis 4 | |
| OBJECT | str | Object name | |
| OBSERVER | str | The observer | |
| PCDEC | float | DEc Pointing centre | |
| PCRA | float | RA Pointing centre | |
| PSF_BMAJ | float | Major axis of the beam | |
| PSF_BMIN | float | Minor axis of the beam | |
| PSF_BPA | float | Position angle of the beam | |
| RESTFREQ | float | line rest frequency | Hz |
