Exposure
- ID
- GRAVI.2023-12-26T04:46:32.726_2
- Header ID
- GRAVI.2023-12-26T04:46:32.726
- Date updated
- 2023-12-26 05:00:31 UTC+0000
- Release date
- 2024-12-26 05:00:31 UTC+0000
- UTC Start
- 2023-12-26 04:46:32.726
- UTC End
- 2023-12-26 04:53:12.726
- MJD Start
- 60304.19898988
- MJD End
- 60304.2036195096
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.0111965
- Ambient temperature (°C)
- 17.27
- Seeing (arcsec)
- 0.785
Observation
- ID
- 58063
- Category
- science
- Program ID
- 112.25RU.001
- Program Title
- IS THE FIRST T DWARF COMPANION A BROWN DWARF BINARY?
- Program Type
- Normal
- PI / COI
- XUAN/ WANG/ LACOUR/ RUFFIO/ ZHANG/ BRANDNER/ MAWET/ RICKMAN
Target
- ID
- 43000
- Name
- HD_42581
- RA
- 92.6442291666667
- DEC
- -21.8646266666667
Instrument
- Interferometer
- VLTI
- Instrument
- GRAVITY_FT
- Instrument mode
- LOW
- Instrument sub-mode
- DUAL
- Stations
- U1 U2 U3 U4
Projected baselines
| Baseline | Length start | Length end | Angle start | Angle end |
|---|---|---|---|---|
| U1-U2 | 56.5440 | 56.5570 | 27.1000 | 27.8000 |
| U1-U3 | 102.4210 | 102.4340 | 33.5000 | 34.1000 |
| U1-U4 | 130.1940 | 130.1040 | 61.4600 | 62.0920 |
| U2-U3 | 46.6400 | 46.6380 | 41.2000 | 41.8000 |
| U2-U4 | 89.3670 | 89.2390 | 82.3560 | 82.9980 |
| U3-U4 | 62.3630 | 62.2460 | 111.8660 | 112.5620 |
Header: used keywords
| Key | Value |
|---|---|
| HIERARCH ESO OBS PROG ID | 112.25RU.001 |
| HIERARCH ESO DPR CATG | SCIENCE |
| HIERARCH ESO DPR TYPE | OBJECT,DUAL |
| MJD-OBS | 60304.19898988 |
| HIERARCH ESO DPR TECH | INTERFEROMETRY,DIRECT |
| HIERARCH ESO OBS TARG NAME | HD 42581 B |
| HIERARCH ESO INS SOBJ NAME | HD_42581_B |
| RA | 92.643198 |
| DEC | -21.86886 |
| HIERARCH ESO INS SPEC RES | MEDIUM |
| HIERARCH ESO INS POLA MODE | COMBINED |
| HIERARCH ESO ISS CONF NTEL | 4 |
| HIERARCH ESO ISS CONF STATION1 | U1 |
| HIERARCH ESO ISS CONF STATION2 | U2 |
| HIERARCH ESO ISS CONF STATION3 | U3 |
| HIERARCH ESO ISS CONF STATION4 | U4 |
| EXPTIME | 414.0 |
| HIERARCH ESO DET2 SEQ1 DIT | 100.0 |
| HIERARCH ESO DET2 NDIT | 4 |
| HIERARCH ESO ISS PBL12 START | 56.544 |
| HIERARCH ESO ISS PBL12 END | 56.557 |
| HIERARCH ESO ISS PBLA12 START | 27.1 |
| HIERARCH ESO ISS PBLA12 END | 27.8 |
| HIERARCH ESO ISS PBL13 START | 102.421 |
| HIERARCH ESO ISS PBL13 END | 102.434 |
| HIERARCH ESO ISS PBLA13 START | 33.5 |
| HIERARCH ESO ISS PBLA13 END | 34.1 |
| HIERARCH ESO ISS PBL14 START | 130.194 |
| HIERARCH ESO ISS PBL14 END | 130.104 |
| HIERARCH ESO ISS PBLA14 START | 61.46 |
| HIERARCH ESO ISS PBLA14 END | 62.092 |
| HIERARCH ESO ISS PBL23 START | 46.64 |
| HIERARCH ESO ISS PBL23 END | 46.638 |
| HIERARCH ESO ISS PBLA23 START | 41.2 |
| HIERARCH ESO ISS PBLA23 END | 41.8 |
| HIERARCH ESO ISS PBL24 START | 89.367 |
| HIERARCH ESO ISS PBL24 END | 89.239 |
| HIERARCH ESO ISS PBLA24 START | 82.356 |
| HIERARCH ESO ISS PBLA24 END | 82.998 |
| HIERARCH ESO ISS PBL34 START | 62.363 |
| HIERARCH ESO ISS PBL34 END | 62.246 |
| HIERARCH ESO ISS PBLA34 START | 111.866 |
| HIERARCH ESO ISS PBLA34 END | 112.562 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.012145 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.010248 |
| HIERARCH ESO ISS AMBI TEMP | 17.27 |
| HIERARCH ESO ISS AMBI FWHM START | 0.68 |
| HIERARCH ESO ISS AMBI FWHM END | 0.89 |
| HIERARCH ESO FT ROBJ NAME | HD_42581 |
| HIERARCH ESO FT ROBJ ALPHA | 061034.615 |
| HIERARCH ESO FT ROBJ DELTA | -215152.656 |