Exposure
- ID
- GRAVI.2023-12-26T05:36:14.852_2
- Header ID
- GRAVI.2023-12-26T05:36:14.852
- Date updated
- 2023-12-26 05:55:30 UTC+0000
- Release date
- 2024-12-26 05:55:30 UTC+0000
- UTC Start
- 2023-12-26 05:36:14.852
- UTC End
- 2023-12-26 05:42:54.852
- MJD Start
- 60304.23350523
- MJD End
- 60304.2381348596
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.009502
- Ambient temperature (°C)
- 17.24
- Seeing (arcsec)
- 0.835
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 | 56.3970 | 56.3270 | 31.5000 | 32.1000 |
| U1-U3 | 101.9080 | 101.7130 | 37.7000 | 38.2000 |
| U1-U4 | 127.7150 | 127.0220 | 65.5770 | 66.0850 |
| U2-U3 | 46.2430 | 46.1110 | 45.3000 | 45.8000 |
| U2-U4 | 86.9100 | 86.2840 | 86.8700 | 87.4970 |
| U3-U4 | 60.6460 | 60.2540 | 117.2600 | 118.1030 |
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 | 60304.23350523 |
| 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 | 56.397 |
| HIERARCH ESO ISS PBL12 END | 56.327 |
| HIERARCH ESO ISS PBLA12 START | 31.5 |
| HIERARCH ESO ISS PBLA12 END | 32.1 |
| HIERARCH ESO ISS PBL13 START | 101.908 |
| HIERARCH ESO ISS PBL13 END | 101.713 |
| HIERARCH ESO ISS PBLA13 START | 37.7 |
| HIERARCH ESO ISS PBLA13 END | 38.2 |
| HIERARCH ESO ISS PBL14 START | 127.715 |
| HIERARCH ESO ISS PBL14 END | 127.022 |
| HIERARCH ESO ISS PBLA14 START | 65.577 |
| HIERARCH ESO ISS PBLA14 END | 66.085 |
| HIERARCH ESO ISS PBL23 START | 46.243 |
| HIERARCH ESO ISS PBL23 END | 46.111 |
| HIERARCH ESO ISS PBLA23 START | 45.3 |
| HIERARCH ESO ISS PBLA23 END | 45.8 |
| HIERARCH ESO ISS PBL24 START | 86.91 |
| HIERARCH ESO ISS PBL24 END | 86.284 |
| HIERARCH ESO ISS PBLA24 START | 86.87 |
| HIERARCH ESO ISS PBLA24 END | 87.497 |
| HIERARCH ESO ISS PBL34 START | 60.646 |
| HIERARCH ESO ISS PBL34 END | 60.254 |
| HIERARCH ESO ISS PBLA34 START | 117.26 |
| HIERARCH ESO ISS PBLA34 END | 118.103 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.00881 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.010194 |
| HIERARCH ESO ISS AMBI TEMP | 17.24 |
| HIERARCH ESO ISS AMBI FWHM START | 0.89 |
| HIERARCH ESO ISS AMBI FWHM END | 0.78 |
| HIERARCH ESO FT ROBJ NAME | HD_42581 |
| HIERARCH ESO FT ROBJ ALPHA | 061034.615 |
| HIERARCH ESO FT ROBJ DELTA | -215152.656 |