Exposure
- ID
- GRAVI.2025-02-12T03:09:40.972_2
- Header ID
- GRAVI.2025-02-12T03:09:40.972
- Date updated
- 2025-02-12 03:25:26 UTC+0000
- Release date
- 2026-02-12 03:25:26 UTC+0000
- UTC Start
- 2025-02-12 03:09:40.972
- UTC End
- 2025-02-12 03:16:20.972
- MJD Start
- 60718.13172421
- MJD End
- 60718.136353839625
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.010459
- Ambient temperature (°C)
- 12.48
- Seeing (arcsec)
- 0.61
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 | 55.6830 | 55.5170 | 34.7000 | 35.1000 |
| U1-U3 | 100.0210 | 99.6000 | 40.7000 | 41.0000 |
| U1-U4 | 121.6350 | 120.3800 | 68.6270 | 69.0410 |
| U2-U3 | 45.0210 | 44.7560 | 48.1000 | 48.4000 |
| U2-U4 | 81.6180 | 80.5630 | 91.0340 | 91.6960 |
| U3-U4 | 57.5240 | 56.9410 | 123.2550 | 124.2890 |
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 | 60718.13172421 |
| HIERARCH ESO DPR TECH | INTERFEROMETRY,DIRECT |
| HIERARCH ESO OBS TARG NAME | HD 42581 B |
| HIERARCH ESO INS SOBJ NAME | HD_42581_B |
| RA | 92.643435 |
| 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 | 55.683 |
| HIERARCH ESO ISS PBL12 END | 55.517 |
| HIERARCH ESO ISS PBLA12 START | 34.7 |
| HIERARCH ESO ISS PBLA12 END | 35.1 |
| HIERARCH ESO ISS PBL13 START | 100.021 |
| HIERARCH ESO ISS PBL13 END | 99.6 |
| HIERARCH ESO ISS PBLA13 START | 40.7 |
| HIERARCH ESO ISS PBLA13 END | 41.0 |
| HIERARCH ESO ISS PBL14 START | 121.635 |
| HIERARCH ESO ISS PBL14 END | 120.38 |
| HIERARCH ESO ISS PBLA14 START | 68.627 |
| HIERARCH ESO ISS PBLA14 END | 69.041 |
| HIERARCH ESO ISS PBL23 START | 45.021 |
| HIERARCH ESO ISS PBL23 END | 44.756 |
| HIERARCH ESO ISS PBLA23 START | 48.1 |
| HIERARCH ESO ISS PBLA23 END | 48.4 |
| HIERARCH ESO ISS PBL24 START | 81.618 |
| HIERARCH ESO ISS PBL24 END | 80.563 |
| HIERARCH ESO ISS PBLA24 START | 91.034 |
| HIERARCH ESO ISS PBLA24 END | 91.696 |
| HIERARCH ESO ISS PBL34 START | 57.524 |
| HIERARCH ESO ISS PBL34 END | 56.941 |
| HIERARCH ESO ISS PBLA34 START | 123.255 |
| HIERARCH ESO ISS PBLA34 END | 124.289 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.011523 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.009395 |
| HIERARCH ESO ISS AMBI TEMP | 12.48 |
| HIERARCH ESO ISS AMBI FWHM START | 0.57 |
| HIERARCH ESO ISS AMBI FWHM END | 0.65 |
| HIERARCH ESO FT ROBJ NAME | HD_42581 |
| HIERARCH ESO FT ROBJ ALPHA | 061034.615 |
| HIERARCH ESO FT ROBJ DELTA | -215152.656 |