Exposure
- ID
- GRAVI.2025-02-12T02:46:13.911_2
- Header ID
- GRAVI.2025-02-12T02:46:13.911
- Date updated
- 2025-02-12 03:00:36 UTC+0000
- Release date
- 2026-02-12 03:00:36 UTC+0000
- UTC Start
- 2025-02-12 02:46:13.911
- UTC End
- 2025-02-12 02:52:53.911
- MJD Start
- 60718.11543879
- MJD End
- 60718.12006841963
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.016801
- Ambient temperature (°C)
- 12.46
- Seeing (arcsec)
- 0.5900000000000001
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 | 56.1320 | 56.0180 | 33.1000 | 33.6000 |
| U1-U3 | 101.1860 | 100.8860 | 39.3000 | 39.7000 |
| U1-U4 | 125.2570 | 124.2960 | 67.1160 | 67.5770 |
| U2-U3 | 45.7640 | 45.5710 | 46.8000 | 47.2000 |
| U2-U4 | 84.7240 | 83.8890 | 88.8420 | 89.4790 |
| U3-U4 | 59.3090 | 58.8180 | 119.9840 | 120.9080 |
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 | 60718.11543879 |
| HIERARCH ESO DPR TECH | INTERFEROMETRY,DIRECT |
| HIERARCH ESO OBS TARG NAME | HD 42581 B |
| HIERARCH ESO INS SOBJ NAME | HD_42581_B |
| RA | 92.643405 |
| DEC | -21.86947 |
| 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 | 56.132 |
| HIERARCH ESO ISS PBL12 END | 56.018 |
| HIERARCH ESO ISS PBLA12 START | 33.1 |
| HIERARCH ESO ISS PBLA12 END | 33.6 |
| HIERARCH ESO ISS PBL13 START | 101.186 |
| HIERARCH ESO ISS PBL13 END | 100.886 |
| HIERARCH ESO ISS PBLA13 START | 39.3 |
| HIERARCH ESO ISS PBLA13 END | 39.7 |
| HIERARCH ESO ISS PBL14 START | 125.257 |
| HIERARCH ESO ISS PBL14 END | 124.296 |
| HIERARCH ESO ISS PBLA14 START | 67.116 |
| HIERARCH ESO ISS PBLA14 END | 67.577 |
| HIERARCH ESO ISS PBL23 START | 45.764 |
| HIERARCH ESO ISS PBL23 END | 45.571 |
| HIERARCH ESO ISS PBLA23 START | 46.8 |
| HIERARCH ESO ISS PBLA23 END | 47.2 |
| HIERARCH ESO ISS PBL24 START | 84.724 |
| HIERARCH ESO ISS PBL24 END | 83.889 |
| HIERARCH ESO ISS PBLA24 START | 88.842 |
| HIERARCH ESO ISS PBLA24 END | 89.479 |
| HIERARCH ESO ISS PBL34 START | 59.309 |
| HIERARCH ESO ISS PBL34 END | 58.818 |
| HIERARCH ESO ISS PBLA34 START | 119.984 |
| HIERARCH ESO ISS PBLA34 END | 120.908 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.01631 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.017292 |
| HIERARCH ESO ISS AMBI TEMP | 12.46 |
| HIERARCH ESO ISS AMBI FWHM START | 0.64 |
| 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 |