Exposure
- ID
- GRAVI.2025-02-12T02:22:37.852_1
- Header ID
- GRAVI.2025-02-12T02:22:37.852
- Date updated
- 2025-02-12 02:40:31 UTC+0000
- Release date
- 2026-02-12 02:40:31 UTC+0000
- UTC Start
- 2025-02-12 02:22:37.852
- UTC End
- 2025-02-12 02:29:17.852
- MJD Start
- 60718.09904921
- MJD End
- 60718.10367883963
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.012875000000000001
- Ambient temperature (°C)
- 12.77
- Seeing (arcsec)
- 0.5700000000000001
Observation
- ID
- 63960
- 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
- 47628
- Name
- HD_42581_B
- RA
- 92.643393
- DEC
- -21.86945
Instrument
Projected baselines
| Baseline | Length start | Length end | Angle start | Angle end |
|---|---|---|---|---|
| U1-U2 | 56.4130 | 56.3470 | 31.4000 | 31.9000 |
| U1-U3 | 101.9550 | 101.7700 | 37.6000 | 38.1000 |
| U1-U4 | 127.8880 | 127.2250 | 65.4360 | 65.9430 |
| U2-U3 | 46.2750 | 46.1500 | 45.2000 | 45.7000 |
| U2-U4 | 87.0690 | 86.4670 | 86.7000 | 87.3210 |
| U3-U4 | 60.7470 | 60.3680 | 117.0360 | 117.8630 |
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 | 60718.09904921 |
| HIERARCH ESO DPR TECH | INTERFEROMETRY,DIRECT |
| HIERARCH ESO OBS TARG NAME | HD 42581 B |
| HIERARCH ESO INS SOBJ NAME | HD_42581_B |
| RA | 92.643393 |
| DEC | -21.86945 |
| 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 | 56.413 |
| HIERARCH ESO ISS PBL12 END | 56.347 |
| HIERARCH ESO ISS PBLA12 START | 31.4 |
| HIERARCH ESO ISS PBLA12 END | 31.9 |
| HIERARCH ESO ISS PBL13 START | 101.955 |
| HIERARCH ESO ISS PBL13 END | 101.77 |
| HIERARCH ESO ISS PBLA13 START | 37.6 |
| HIERARCH ESO ISS PBLA13 END | 38.1 |
| HIERARCH ESO ISS PBL14 START | 127.888 |
| HIERARCH ESO ISS PBL14 END | 127.225 |
| HIERARCH ESO ISS PBLA14 START | 65.436 |
| HIERARCH ESO ISS PBLA14 END | 65.943 |
| HIERARCH ESO ISS PBL23 START | 46.275 |
| HIERARCH ESO ISS PBL23 END | 46.15 |
| HIERARCH ESO ISS PBLA23 START | 45.2 |
| HIERARCH ESO ISS PBLA23 END | 45.7 |
| HIERARCH ESO ISS PBL24 START | 87.069 |
| HIERARCH ESO ISS PBL24 END | 86.467 |
| HIERARCH ESO ISS PBLA24 START | 86.7 |
| HIERARCH ESO ISS PBLA24 END | 87.321 |
| HIERARCH ESO ISS PBL34 START | 60.747 |
| HIERARCH ESO ISS PBL34 END | 60.368 |
| HIERARCH ESO ISS PBLA34 START | 117.036 |
| HIERARCH ESO ISS PBLA34 END | 117.863 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.010577 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.015173 |
| HIERARCH ESO ISS AMBI TEMP | 12.77 |
| HIERARCH ESO ISS AMBI FWHM START | 0.6 |
| HIERARCH ESO ISS AMBI FWHM END | 0.54 |
| HIERARCH ESO FT ROBJ NAME | HD_42581 |
| HIERARCH ESO FT ROBJ ALPHA | 061034.615 |
| HIERARCH ESO FT ROBJ DELTA | -215152.656 |