Exposure
- ID
- GRAVI.2023-12-26T05:15:41.800_2
- Header ID
- GRAVI.2023-12-26T05:15:41.800
- Date updated
- 2023-12-26 05:30:21 UTC+0000
- Release date
- 2024-12-26 05:30:21 UTC+0000
- UTC Start
- 2023-12-26 05:15:41.800
- UTC End
- 2023-12-26 05:22:21.800
- MJD Start
- 60304.2192338
- MJD End
- 60304.2238634296
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.012467
- Ambient temperature (°C)
- 17.37
- Seeing (arcsec)
- 0.635
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 | 56.5280 | 56.4960 | 29.9000 | 30.4000 |
| U1-U3 | 102.2990 | 102.1970 | 36.1000 | 36.7000 |
| U1-U4 | 129.2630 | 128.8240 | 63.9820 | 64.5360 |
| U2-U3 | 46.5190 | 46.4440 | 43.7000 | 44.3000 |
| U2-U4 | 88.3600 | 87.9390 | 85.0180 | 85.6430 |
| U3-U4 | 61.5970 | 61.3120 | 114.9050 | 115.6780 |
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 | 60304.2192338 |
| 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 | 56.528 |
| HIERARCH ESO ISS PBL12 END | 56.496 |
| HIERARCH ESO ISS PBLA12 START | 29.9 |
| HIERARCH ESO ISS PBLA12 END | 30.4 |
| HIERARCH ESO ISS PBL13 START | 102.299 |
| HIERARCH ESO ISS PBL13 END | 102.197 |
| HIERARCH ESO ISS PBLA13 START | 36.1 |
| HIERARCH ESO ISS PBLA13 END | 36.7 |
| HIERARCH ESO ISS PBL14 START | 129.263 |
| HIERARCH ESO ISS PBL14 END | 128.824 |
| HIERARCH ESO ISS PBLA14 START | 63.982 |
| HIERARCH ESO ISS PBLA14 END | 64.536 |
| HIERARCH ESO ISS PBL23 START | 46.519 |
| HIERARCH ESO ISS PBL23 END | 46.444 |
| HIERARCH ESO ISS PBLA23 START | 43.7 |
| HIERARCH ESO ISS PBLA23 END | 44.3 |
| HIERARCH ESO ISS PBL24 START | 88.36 |
| HIERARCH ESO ISS PBL24 END | 87.939 |
| HIERARCH ESO ISS PBLA24 START | 85.018 |
| HIERARCH ESO ISS PBLA24 END | 85.643 |
| HIERARCH ESO ISS PBL34 START | 61.597 |
| HIERARCH ESO ISS PBL34 END | 61.312 |
| HIERARCH ESO ISS PBLA34 START | 114.905 |
| HIERARCH ESO ISS PBLA34 END | 115.678 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.010795 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.014139 |
| HIERARCH ESO ISS AMBI TEMP | 17.37 |
| HIERARCH ESO ISS AMBI FWHM START | 0.7 |
| HIERARCH ESO ISS AMBI FWHM END | 0.57 |
| HIERARCH ESO FT ROBJ NAME | HD_42581 |
| HIERARCH ESO FT ROBJ ALPHA | 061034.615 |
| HIERARCH ESO FT ROBJ DELTA | -215152.656 |