Exposure
- ID
- GRAVI.2023-12-26T04:31:08.687_2
- Header ID
- GRAVI.2023-12-26T04:31:08.687
- Date updated
- 2023-12-26 04:45:51 UTC+0000
- Release date
- 2024-12-26 04:45:51 UTC+0000
- UTC Start
- 2023-12-26 04:31:08.687
- UTC End
- 2023-12-26 04:37:48.687
- MJD Start
- 60304.18829499
- MJD End
- 60304.1929246196
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.0125445
- Ambient temperature (°C)
- 17.5
- Seeing (arcsec)
- 0.715
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 | 56.4860 | 56.5170 | 25.6000 | 26.3000 |
| U1-U3 | 102.3060 | 102.3710 | 31.9000 | 32.6000 |
| U1-U4 | 130.1100 | 130.1960 | 59.9910 | 60.6580 |
| U2-U3 | 46.5870 | 46.6200 | 39.6000 | 40.3000 |
| U2-U4 | 89.4020 | 89.4290 | 80.9110 | 81.5590 |
| U3-U4 | 62.4710 | 62.4490 | 110.3790 | 111.0330 |
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 | 60304.18829499 |
| 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 | 56.486 |
| HIERARCH ESO ISS PBL12 END | 56.517 |
| HIERARCH ESO ISS PBLA12 START | 25.6 |
| HIERARCH ESO ISS PBLA12 END | 26.3 |
| HIERARCH ESO ISS PBL13 START | 102.306 |
| HIERARCH ESO ISS PBL13 END | 102.371 |
| HIERARCH ESO ISS PBLA13 START | 31.9 |
| HIERARCH ESO ISS PBLA13 END | 32.6 |
| HIERARCH ESO ISS PBL14 START | 130.11 |
| HIERARCH ESO ISS PBL14 END | 130.196 |
| HIERARCH ESO ISS PBLA14 START | 59.991 |
| HIERARCH ESO ISS PBLA14 END | 60.658 |
| HIERARCH ESO ISS PBL23 START | 46.587 |
| HIERARCH ESO ISS PBL23 END | 46.62 |
| HIERARCH ESO ISS PBLA23 START | 39.6 |
| HIERARCH ESO ISS PBLA23 END | 40.3 |
| HIERARCH ESO ISS PBL24 START | 89.402 |
| HIERARCH ESO ISS PBL24 END | 89.429 |
| HIERARCH ESO ISS PBLA24 START | 80.911 |
| HIERARCH ESO ISS PBLA24 END | 81.559 |
| HIERARCH ESO ISS PBL34 START | 62.471 |
| HIERARCH ESO ISS PBL34 END | 62.449 |
| HIERARCH ESO ISS PBLA34 START | 110.379 |
| HIERARCH ESO ISS PBLA34 END | 111.033 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.010269 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.01482 |
| HIERARCH ESO ISS AMBI TEMP | 17.5 |
| HIERARCH ESO ISS AMBI FWHM START | 0.82 |
| HIERARCH ESO ISS AMBI FWHM END | 0.61 |
| HIERARCH ESO FT ROBJ NAME | HD_42581 |
| HIERARCH ESO FT ROBJ ALPHA | 061034.615 |
| HIERARCH ESO FT ROBJ DELTA | -215152.656 |