Exposure
- ID
- GRAVI.2023-12-30T06:18:38.095_2
- Header ID
- GRAVI.2023-12-30T06:18:38.095
- Date updated
- 2023-12-30 06:30:54 UTC+0000
- Release date
- 2024-12-30 06:30:54 UTC+0000
- UTC Start
- 2023-12-30 06:18:38.095
- UTC End
- 2023-12-30 06:25:18.095
- MJD Start
- 60308.26294092
- MJD End
- 60308.2675705496
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.006004
- Ambient temperature (°C)
- 13.83
- Seeing (arcsec)
- 0.73
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 | 55.3590 | 55.1620 | 35.4000 | 35.7000 |
| U1-U3 | 99.2000 | 98.7070 | 41.3000 | 41.6000 |
| U1-U4 | 119.2090 | 117.7860 | 69.3930 | 69.7850 |
| U2-U3 | 44.5070 | 44.2020 | 48.7000 | 49.0000 |
| U2-U4 | 79.5840 | 78.4060 | 92.2840 | 92.9710 |
| U3-U4 | 56.4090 | 55.7820 | 125.2260 | 126.3350 |
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 | 60308.26294092 |
| HIERARCH ESO DPR TECH | INTERFEROMETRY,DIRECT |
| HIERARCH ESO OBS TARG NAME | HD 42581 B |
| HIERARCH ESO INS SOBJ NAME | HD_42581_B |
| RA | 92.643501 |
| DEC | -21.86884 |
| 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 | 55.359 |
| HIERARCH ESO ISS PBL12 END | 55.162 |
| HIERARCH ESO ISS PBLA12 START | 35.4 |
| HIERARCH ESO ISS PBLA12 END | 35.7 |
| HIERARCH ESO ISS PBL13 START | 99.2 |
| HIERARCH ESO ISS PBL13 END | 98.707 |
| HIERARCH ESO ISS PBLA13 START | 41.3 |
| HIERARCH ESO ISS PBLA13 END | 41.6 |
| HIERARCH ESO ISS PBL14 START | 119.209 |
| HIERARCH ESO ISS PBL14 END | 117.786 |
| HIERARCH ESO ISS PBLA14 START | 69.393 |
| HIERARCH ESO ISS PBLA14 END | 69.785 |
| HIERARCH ESO ISS PBL23 START | 44.507 |
| HIERARCH ESO ISS PBL23 END | 44.202 |
| HIERARCH ESO ISS PBLA23 START | 48.7 |
| HIERARCH ESO ISS PBLA23 END | 49.0 |
| HIERARCH ESO ISS PBL24 START | 79.584 |
| HIERARCH ESO ISS PBL24 END | 78.406 |
| HIERARCH ESO ISS PBLA24 START | 92.284 |
| HIERARCH ESO ISS PBLA24 END | 92.971 |
| HIERARCH ESO ISS PBL34 START | 56.409 |
| HIERARCH ESO ISS PBL34 END | 55.782 |
| HIERARCH ESO ISS PBLA34 START | 125.226 |
| HIERARCH ESO ISS PBLA34 END | 126.335 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.006315 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.005693 |
| HIERARCH ESO ISS AMBI TEMP | 13.83 |
| HIERARCH ESO ISS AMBI FWHM START | 0.6 |
| HIERARCH ESO ISS AMBI FWHM END | 0.86 |
| HIERARCH ESO FT ROBJ NAME | HD_42581 |
| HIERARCH ESO FT ROBJ ALPHA | 061034.615 |
| HIERARCH ESO FT ROBJ DELTA | -215152.656 |