Exposure
- ID
- GRAVI.2025-02-12T03:25:41.012_2
- Header ID
- GRAVI.2025-02-12T03:25:41.012
- Date updated
- 2025-02-12 03:45:32 UTC+0000
- Release date
- 2026-02-12 03:45:32 UTC+0000
- UTC Start
- 2025-02-12 03:25:41.012
- UTC End
- 2025-02-12 03:32:21.012
- MJD Start
- 60718.14283579
- MJD End
- 60718.14746541963
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.0095405
- Ambient temperature (°C)
- 13.07
- Seeing (arcsec)
- 0.605
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 | 55.2740 | 55.0720 | 35.5000 | 35.9000 |
| U1-U3 | 98.9870 | 98.4830 | 41.5000 | 41.8000 |
| U1-U4 | 118.5940 | 117.1480 | 69.5680 | 69.9500 |
| U2-U3 | 44.3750 | 44.0640 | 48.9000 | 49.1000 |
| U2-U4 | 79.0750 | 77.8820 | 92.5860 | 93.2720 |
| U3-U4 | 56.1370 | 55.5070 | 125.7090 | 126.8250 |
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 | 60718.14283579 |
| HIERARCH ESO DPR TECH | INTERFEROMETRY,DIRECT |
| HIERARCH ESO OBS TARG NAME | HD 42581 B |
| HIERARCH ESO INS SOBJ NAME | HD_42581_B |
| RA | 92.643406 |
| DEC | -21.86948 |
| 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 | 55.274 |
| HIERARCH ESO ISS PBL12 END | 55.072 |
| HIERARCH ESO ISS PBLA12 START | 35.5 |
| HIERARCH ESO ISS PBLA12 END | 35.9 |
| HIERARCH ESO ISS PBL13 START | 98.987 |
| HIERARCH ESO ISS PBL13 END | 98.483 |
| HIERARCH ESO ISS PBLA13 START | 41.5 |
| HIERARCH ESO ISS PBLA13 END | 41.8 |
| HIERARCH ESO ISS PBL14 START | 118.594 |
| HIERARCH ESO ISS PBL14 END | 117.148 |
| HIERARCH ESO ISS PBLA14 START | 69.568 |
| HIERARCH ESO ISS PBLA14 END | 69.95 |
| HIERARCH ESO ISS PBL23 START | 44.375 |
| HIERARCH ESO ISS PBL23 END | 44.064 |
| HIERARCH ESO ISS PBLA23 START | 48.9 |
| HIERARCH ESO ISS PBLA23 END | 49.1 |
| HIERARCH ESO ISS PBL24 START | 79.075 |
| HIERARCH ESO ISS PBL24 END | 77.882 |
| HIERARCH ESO ISS PBLA24 START | 92.586 |
| HIERARCH ESO ISS PBLA24 END | 93.272 |
| HIERARCH ESO ISS PBL34 START | 56.137 |
| HIERARCH ESO ISS PBL34 END | 55.507 |
| HIERARCH ESO ISS PBLA34 START | 125.709 |
| HIERARCH ESO ISS PBLA34 END | 126.825 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.008445 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.010636 |
| HIERARCH ESO ISS AMBI TEMP | 13.07 |
| HIERARCH ESO ISS AMBI FWHM START | 0.67 |
| 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 |