Exposure
- ID
- GRAVI.2024-12-19T07:49:48.361_2
- Header ID
- GRAVI.2024-12-19T07:49:48.361
- Date updated
- 2024-12-19 08:05:31 UTC+0000
- Release date
- 2025-12-19 08:05:31 UTC+0000
- UTC Start
- 2024-12-19 07:49:48.361
- UTC End
- 2024-12-19 07:56:28.361
- MJD Start
- 60663.32625418
- MJD End
- 60663.33088380963
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.0081245
- Ambient temperature (°C)
- 13.87
- Seeing (arcsec)
- 0.71
Observation
- ID
- 58536
- Category
- science
- Program ID
- 112.26Z1.001
- Program Title
- RESOLVING THE FIRST T DWARF COMPANION AS A TIGHT BROWN DWARF BINARY
- Program Type
- ToO
- PI / COI
- XUAN/ LACOUR/ WANG/ MAWET/ RICKMAN/ BRANDNER/ ZHANG/ MÉRAND/ WINTERHALDER/ SPEZZANO/ JANSON/ HINKLEY/ KRAL/ KAMMERER/ BALMER/ BOURDAROT/ RUFFIO/ OTTEN
Target
- ID
- 43000
- Name
- HD_42581
- RA
- 92.64422916666666
- DEC
- -21.86462666666667
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 | 53.5140 | 53.1920 | 37.5000 | 37.7000 |
| U1-U3 | 94.6910 | 93.9200 | 43.2000 | 43.3000 |
| U1-U4 | 106.7780 | 104.7440 | 71.9610 | 72.2530 |
| U2-U3 | 41.7650 | 41.3050 | 50.4000 | 50.5000 |
| U2-U4 | 69.5550 | 67.9630 | 97.7370 | 98.5750 |
| U3-U4 | 51.4400 | 50.7260 | 134.4010 | 135.8520 |
Header: used keywords
| Key | Value |
|---|---|
| HIERARCH ESO OBS PROG ID | 112.26Z1.001 |
| HIERARCH ESO DPR CATG | SCIENCE |
| HIERARCH ESO DPR TYPE | OBJECT,DUAL |
| MJD-OBS | 60663.32625418 |
| 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 | -21.86936 |
| 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 | 53.514 |
| HIERARCH ESO ISS PBL12 END | 53.192 |
| HIERARCH ESO ISS PBLA12 START | 37.5 |
| HIERARCH ESO ISS PBLA12 END | 37.7 |
| HIERARCH ESO ISS PBL13 START | 94.691 |
| HIERARCH ESO ISS PBL13 END | 93.92 |
| HIERARCH ESO ISS PBLA13 START | 43.2 |
| HIERARCH ESO ISS PBLA13 END | 43.3 |
| HIERARCH ESO ISS PBL14 START | 106.778 |
| HIERARCH ESO ISS PBL14 END | 104.744 |
| HIERARCH ESO ISS PBLA14 START | 71.961 |
| HIERARCH ESO ISS PBLA14 END | 72.253 |
| HIERARCH ESO ISS PBL23 START | 41.765 |
| HIERARCH ESO ISS PBL23 END | 41.305 |
| HIERARCH ESO ISS PBLA23 START | 50.4 |
| HIERARCH ESO ISS PBLA23 END | 50.5 |
| HIERARCH ESO ISS PBL24 START | 69.555 |
| HIERARCH ESO ISS PBL24 END | 67.963 |
| HIERARCH ESO ISS PBLA24 START | 97.737 |
| HIERARCH ESO ISS PBLA24 END | 98.575 |
| HIERARCH ESO ISS PBL34 START | 51.44 |
| HIERARCH ESO ISS PBL34 END | 50.726 |
| HIERARCH ESO ISS PBLA34 START | 134.401 |
| HIERARCH ESO ISS PBLA34 END | 135.852 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.009245 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.007004 |
| HIERARCH ESO ISS AMBI TEMP | 13.87 |
| HIERARCH ESO ISS AMBI FWHM START | 0.75 |
| HIERARCH ESO ISS AMBI FWHM END | 0.67 |
| HIERARCH ESO FT ROBJ NAME | HD_42581 |
| HIERARCH ESO FT ROBJ ALPHA | 061034.615 |
| HIERARCH ESO FT ROBJ DELTA | -215152.656 |