Exposure
- ID
- GRAVI.2023-12-26T04:13:56.643_2
- Header ID
- GRAVI.2023-12-26T04:13:56.643
- Date updated
- 2023-12-26 04:30:35 UTC+0000
- Release date
- 2024-12-26 04:30:35 UTC+0000
- UTC Start
- 2023-12-26 04:13:56.643
- UTC End
- 2023-12-26 04:20:36.643
- MJD Start
- 60304.17635004
- MJD End
- 60304.1809796696
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.018123
- Ambient temperature (°C)
- 17.51
- Seeing (arcsec)
- 0.56
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 | 56.3780 | 56.4270 | 23.7000 | 24.5000 |
| U1-U3 | 102.0550 | 102.1710 | 30.1000 | 30.9000 |
| U1-U4 | 129.5710 | 129.8440 | 58.2550 | 58.9760 |
| U2-U3 | 46.4440 | 46.5120 | 37.8000 | 38.6000 |
| U2-U4 | 89.0380 | 89.2360 | 79.2770 | 79.9470 |
| U3-U4 | 62.3380 | 62.4250 | 108.8300 | 109.4490 |
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 | 60304.17635004 |
| 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 | 56.378 |
| HIERARCH ESO ISS PBL12 END | 56.427 |
| HIERARCH ESO ISS PBLA12 START | 23.7 |
| HIERARCH ESO ISS PBLA12 END | 24.5 |
| HIERARCH ESO ISS PBL13 START | 102.055 |
| HIERARCH ESO ISS PBL13 END | 102.171 |
| HIERARCH ESO ISS PBLA13 START | 30.1 |
| HIERARCH ESO ISS PBLA13 END | 30.9 |
| HIERARCH ESO ISS PBL14 START | 129.571 |
| HIERARCH ESO ISS PBL14 END | 129.844 |
| HIERARCH ESO ISS PBLA14 START | 58.255 |
| HIERARCH ESO ISS PBLA14 END | 58.976 |
| HIERARCH ESO ISS PBL23 START | 46.444 |
| HIERARCH ESO ISS PBL23 END | 46.512 |
| HIERARCH ESO ISS PBLA23 START | 37.8 |
| HIERARCH ESO ISS PBLA23 END | 38.6 |
| HIERARCH ESO ISS PBL24 START | 89.038 |
| HIERARCH ESO ISS PBL24 END | 89.236 |
| HIERARCH ESO ISS PBLA24 START | 79.277 |
| HIERARCH ESO ISS PBLA24 END | 79.947 |
| HIERARCH ESO ISS PBL34 START | 62.338 |
| HIERARCH ESO ISS PBL34 END | 62.425 |
| HIERARCH ESO ISS PBLA34 START | 108.83 |
| HIERARCH ESO ISS PBLA34 END | 109.449 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.019322 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.016924 |
| HIERARCH ESO ISS AMBI TEMP | 17.51 |
| HIERARCH ESO ISS AMBI FWHM START | 0.57 |
| HIERARCH ESO ISS AMBI FWHM END | 0.55 |
| HIERARCH ESO FT ROBJ NAME | HD_42581 |
| HIERARCH ESO FT ROBJ ALPHA | 061034.615 |
| HIERARCH ESO FT ROBJ DELTA | -215152.656 |