Exposure
- ID
- GRAVI.2023-12-30T05:47:14.016_2
- Header ID
- GRAVI.2023-12-30T05:47:14.016
- Date updated
- 2023-12-30 06:05:50 UTC+0000
- Release date
- 2024-12-30 06:05:50 UTC+0000
- UTC Start
- 2023-12-30 05:47:14.016
- UTC End
- 2023-12-30 05:53:54.016
- MJD Start
- 60308.24113444
- MJD End
- 60308.2457640696
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.004873
- Ambient temperature (°C)
- 13.79
- Seeing (arcsec)
- 0.63
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 | 56.0500 | 55.9240 | 33.5000 | 33.9000 |
| U1-U3 | 100.9700 | 100.6410 | 39.6000 | 40.0000 |
| U1-U4 | 124.5620 | 123.5270 | 67.4540 | 67.9090 |
| U2-U3 | 45.6250 | 45.4140 | 47.1000 | 47.5000 |
| U2-U4 | 84.1190 | 83.2270 | 89.3070 | 89.9540 |
| U3-U4 | 58.9510 | 58.4340 | 120.6580 | 121.6130 |
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 | 60308.24113444 |
| 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 | 56.05 |
| HIERARCH ESO ISS PBL12 END | 55.924 |
| HIERARCH ESO ISS PBLA12 START | 33.5 |
| HIERARCH ESO ISS PBLA12 END | 33.9 |
| HIERARCH ESO ISS PBL13 START | 100.97 |
| HIERARCH ESO ISS PBL13 END | 100.641 |
| HIERARCH ESO ISS PBLA13 START | 39.6 |
| HIERARCH ESO ISS PBLA13 END | 40.0 |
| HIERARCH ESO ISS PBL14 START | 124.562 |
| HIERARCH ESO ISS PBL14 END | 123.527 |
| HIERARCH ESO ISS PBLA14 START | 67.454 |
| HIERARCH ESO ISS PBLA14 END | 67.909 |
| HIERARCH ESO ISS PBL23 START | 45.625 |
| HIERARCH ESO ISS PBL23 END | 45.414 |
| HIERARCH ESO ISS PBLA23 START | 47.1 |
| HIERARCH ESO ISS PBLA23 END | 47.5 |
| HIERARCH ESO ISS PBL24 START | 84.119 |
| HIERARCH ESO ISS PBL24 END | 83.227 |
| HIERARCH ESO ISS PBLA24 START | 89.307 |
| HIERARCH ESO ISS PBLA24 END | 89.954 |
| HIERARCH ESO ISS PBL34 START | 58.951 |
| HIERARCH ESO ISS PBL34 END | 58.434 |
| HIERARCH ESO ISS PBLA34 START | 120.658 |
| HIERARCH ESO ISS PBLA34 END | 121.613 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.004911 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.004835 |
| HIERARCH ESO ISS AMBI TEMP | 13.79 |
| HIERARCH ESO ISS AMBI FWHM START | 0.65 |
| 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 |