| COI | str | List of the CO Investigator names. | |
| creation_date | datetime | The creation date of the object | |
| DATE_OBS | datetime | UTC date on which the data of this file were obtained. The format used is YYYY-MM-DDThh:mm:ss.sss | |
| DEC | float | Telescope pointing in mean places of equinox J2000, expressed in decimal degrees. The comment field include the value expressed in degrees, minutes and seconds. | deg |
| EQUINOX | float | Epoch of the mean equator and equinox of the coordinate system used to express the WCS mapping. Should always be 2000.0 (FK5). Should not be present if RADECSYS=ICRS. | |
| ESO_AOS_HO_LOOP_ST | int | High Order loop status | |
| ESO_AOS_JIT_LOOP_ST | int | Jitter loop status | |
| ESO_AOS_NGS_ALPHA | float | Alpha coordinate for the natural guide star | hms |
| ESO_AOS_NGS_DELTA | float | Delta coordinate for the natural guide star | dms |
| ESO_AOS_TT_LOOP_ST | int | Tip-tilt loop status | |
| ESO_DET_READ_CURID | int | Used readout mode id | |
| ESO_INS_DROT_POSANG | float | Instrument position angle on sky. | deg |
| ESO_INS_MODE | str | Used instrument mode. | |
| ESO_INS_TEMP11_VAL | float | Left IFU temperature | C |
| ESO_OBS_AIRM | float | Required max. airmass | |
| ESO_OBS_AMBI_FWHM | float | Required max. seeing | |
| ESO_OBS_ID | int | Observation block id. | |
| ESO_OBS_NAME | str | Observation block name. | |
| ESO_OBS_PROG_ID | str | Program ID. | |
| ESO_OBS_START | datetime | Observation block start time. | |
| ESO_OBS_TARG_NAME | str | Target package name. | |
| ESO_OCS_SGS_AG_FWHMX_AVG | float | Major axis of the seeing FWHM from the VLT auto-guider measurement. | arcsec |
| ESO_OCS_SGS_AG_FWHMY_AVG | float | Minor axis of the seeing FWHM from the VLT auto-guider measurement. | arcsec |
| ESO_OCS_SGS_ASM_GL900_MED | float | median of ASM ground layer ratio at 900m | |
| ESO_OCS_SGS_ASM_GL900_RMS | float | RMS of ASM ground layer ratio at 900m | |
| ESO_OCS_SGS_FLUX_AVG | float | Slow guiding system flux measurement average during the exposure. | ADU |
| ESO_OCS_SGS_FLUX_RMS | float | Slow guiding system flux measurement root mean square during the exposure. | ADU |
| ESO_OCS_SGS_FWHM_AVG | float | Slow guiding system FWHM average during the exposure. | arcsec |
| ESO_OCS_SGS_FWHM_RMS | float | Slow guiding system FWHM root mean square during the exposure. | arcsec |
| eso_program | EsoProgram | The Eso Program specifics | |
| ESO_TEL_AIRM_END | float | Airmass at end | |
| ESO_TEL_AIRM_START | float | Airmass at start | |
| ESO_TEL_AMBI_FWHM_END | float | Average FWHM of the observatory seeing at the end of the observation. | |
| ESO_TEL_AMBI_FWHM_START | float | Average FWHM of the observatory seeing at the beginning of the observation. | |
| ESO_TEL_AMBI_TAU0 | float | Average coherence time | s |
| ESO_TEL_PARANG_END | float | Parallactic angle at end | deg |
| ESO_TEL_PARANG_START | float | Parallactic angle at start | deg |
| ESO_TPL_NEXP | int | Total number of exposures within the template. | |
| ESO_TPL_START | datetime | Observation template start time. The format is YYYY-MM-DDThh:mm:ss.sss. This keyword also defines which exposures are to be grouped together. | |
| EXPTIME | float | The integration time for a single observation. | s |
| file_deleted | int | Switch to indicate if file has been deleted from the data server(s) | |
| filename | str | The name of the associated file | |
| globalname | str | The name used to store and retrieve file to and from Storage | |
| is_valid | int | Manual/external flag to disqualify bad data (SuperFlag) | |
| LST | float | Local Sidereal Time at start of the exposure in seconds elapsed since sidereal midnight. The comment includes a civil representation of the value. | s |
| MJD_OBS | float | Modified Julian Day of the start of the exposure. The MJD is related to the Julian Day (JD) via the formula: MJD = JD-2400000.5 The comment includes a civil representation of the date and time. 8 decimals are required for a precision of one millisecond, 5 decimals for a precision of one second. | d |
| nifu | int | The IFU used to make the observation | |
| OBJECT_NAME | str | Identification of target observed. | |
| OBSERVER | str | Initials, family name of observer. | |
| observing_block | ObservingBlock | The Observing Block of the observation | |
| PI | str | Name of the Primary Investigator. | |
| PI_COI | str | Name(s) of proposer(s) (as opposed to observer). | |
| RA | float | Telescope pointing in mean places of equinox J2000, expressed in decimal degrees. The comment field include the value expressed in hours, minutes and seconds. | deg |
| RADECSYS | str | Coordinate system. Normally FK5 or ICRS. | |
| raw_fits | RawFits | The unsplitted raw fits data | |
