| FITS keyword | values (example) | description |
|---|
| file names |
|---|
| ORIGFILE | | file name on instrument workstation (with information to which file this 100 MB file belongs to, suffixes: _01, _02, ...) |
| ARCFILE | | archive file name (real file name on disk) |
| date and time |
|---|
| DATE | 2007-11-24T01:09:15.276 | date the file was written |
| DATE-OBS | 2007-11-24T01:09:15.276 | observing date |
| UTC | 4053.000 | UTC at start in sec from midnight |
| LST | 2185.177 | LST at start in sec from midnight |
| telescope and interferometer keywords |
|---|
| TELESCOP | ESO-VLTI-U34 | which baseline |
| RA | 345.815786 | RA (decimal) |
| DEC | 8.87395 | DEC (decimal) |
| ISS.CONF.DL1 | DL3 | delay line used |
| ISS.CONF.DL2 | DL4 | delay line used |
| ISS.PBL12.START | 52.242 | projected baseline at start |
| ISS.PBL12.END | 51.854 | projected baseline at end |
| ISS.PBLA12.START | 106.8 | projected baseline orientation angle at start |
| ISS.PBLA12.END | 106.8 | projected baseline orientation angle at end |
| Coudé guiding |
|---|
| COU.GUID.STATUS | ON or OFF | |
| COU.GUID.MAG | 13.3 | Coudé guide star mag |
| conditions |
|---|
| ISS.AIRM.START | | airmass at start |
| ISS.AIRM.END | | airmass at end |
| ISS.ALT | 49.553 | altitude angle at start |
| ISS.AMBI.FWHM.START | | observatory seeing at start |
| ISS.AMBI.FWHM.END | | observatory seeing at end |
| ISS.AMBI.PRES | | ambient air pressure |
| ISS.AMBI.RHUM | | relative humidity |
| ISS.AMBI.TAU0.START | | coherence time at start |
| ISS.AMBI.TAU0.END | | coherence time at end |
| ISS.AMBI.TEMP | | ambient temperature |
| ISS.AMBI.WINDDIR | | wind direction |
| ISS.AMBI.WINDSP | | wind speed |
| ISS.CHOP.THROW | | chop throw in arcsec |
| ISS.CHOP.FREQ | | chopping frequency |
| ISS.CHOP.POSANG | | chopping angle |
| ISS.CHOP.ST | T,F | (T)arget or (F)ield |
| exposure info |
|---|
| DET.DIT | 1.800000e-02 | subintegration time [s] |
| DET.NDIT | 3560 | number of subintegrations |
| DET.NRTS.MODE | OBS_FRINGE_TRACK_DISPERSED_OFF | NRTS (near-real time software) mode |
| EXPTIME | | exposure time [units???] |
| instrument keywords |
|---|
| INS.GRIS.ID | PRISM, GRISM or OPEN | |
| INS.OPT1.ID | HIGH_SENS, SCI_PHOT or OPEN | |
| INS.FILT.NAME | or OPEN | acquisition filter name |
| INS.MODE | STARINTF, ... | instrument mode used |
| INS.SHUT.NAME | ABOPEN, ... | shutter info |
| INS.SLIT.NAME | SLIT_0.2, ... | slit info |
| OB info |
|---|
| OBS.ID | 200171532 | OB ID |
| OBS.NAME | SCI_NGC7469 | OB name |
| OBS.PROG.ID | 080.B-0258(A) | ESO program ID |
| OBS.TARG.NAME | NGC7469 | target name |
| template keywords |
|---|
| DPR.CATG | SCIENCE,CALIB,... | data product category |
| DPR.TYPE | 'TRACK,OBJECT,DISPERSED' | data product type |