Exposure
- ID
- GRAVI.2025-02-12T03:32:56.030_1
- Header ID
- GRAVI.2025-02-12T03:32:56.030
- Date updated
- 2025-02-12 03:50:27 UTC+0000
- Release date
- 2026-02-12 03:50:27 UTC+0000
- UTC Start
- 2025-02-12 03:32:56.030
- UTC End
- 2025-02-12 03:39:36.030
- MJD Start
- 60718.14787072
- MJD End
- 60718.15250034963
- Exposure time (s)
- 400.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.0097275
- Ambient temperature (°C)
- 13.0
- Seeing (arcsec)
- 0.5900000000000001
Observation
- ID
- 63966
- 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
- 47634
- Name
- HD_42581_B
- RA
- 92.643402
- DEC
- -21.86949
Instrument
Projected baselines
| Baseline | Length start | Length end | Angle start | Angle end |
|---|---|---|---|---|
| U1-U2 | 55.0600 | 54.8400 | 35.9000 | 36.2000 |
| U1-U3 | 98.4550 | 97.9080 | 41.8000 | 42.1000 |
| U1-U4 | 117.0680 | 115.5260 | 69.9700 | 70.3400 |
| U2-U3 | 44.0460 | 43.7110 | 49.2000 | 49.4000 |
| U2-U4 | 77.8170 | 76.5550 | 93.3090 | 94.0130 |
| U3-U4 | 55.4730 | 54.8210 | 126.8850 | 128.0490 |
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 | 60718.14787072 |
| HIERARCH ESO DPR TECH | INTERFEROMETRY,DIRECT |
| HIERARCH ESO OBS TARG NAME | HD 42581 B |
| HIERARCH ESO INS SOBJ NAME | HD_42581_B |
| RA | 92.643402 |
| DEC | -21.86949 |
| 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 | 55.06 |
| HIERARCH ESO ISS PBL12 END | 54.84 |
| HIERARCH ESO ISS PBLA12 START | 35.9 |
| HIERARCH ESO ISS PBLA12 END | 36.2 |
| HIERARCH ESO ISS PBL13 START | 98.455 |
| HIERARCH ESO ISS PBL13 END | 97.908 |
| HIERARCH ESO ISS PBLA13 START | 41.8 |
| HIERARCH ESO ISS PBLA13 END | 42.1 |
| HIERARCH ESO ISS PBL14 START | 117.068 |
| HIERARCH ESO ISS PBL14 END | 115.526 |
| HIERARCH ESO ISS PBLA14 START | 69.97 |
| HIERARCH ESO ISS PBLA14 END | 70.34 |
| HIERARCH ESO ISS PBL23 START | 44.046 |
| HIERARCH ESO ISS PBL23 END | 43.711 |
| HIERARCH ESO ISS PBLA23 START | 49.2 |
| HIERARCH ESO ISS PBLA23 END | 49.4 |
| HIERARCH ESO ISS PBL24 START | 77.817 |
| HIERARCH ESO ISS PBL24 END | 76.555 |
| HIERARCH ESO ISS PBLA24 START | 93.309 |
| HIERARCH ESO ISS PBLA24 END | 94.013 |
| HIERARCH ESO ISS PBL34 START | 55.473 |
| HIERARCH ESO ISS PBL34 END | 54.821 |
| HIERARCH ESO ISS PBLA34 START | 126.885 |
| HIERARCH ESO ISS PBLA34 END | 128.049 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.010636 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.008819 |
| HIERARCH ESO ISS AMBI TEMP | 13.0 |
| HIERARCH ESO ISS AMBI FWHM START | 0.54 |
| HIERARCH ESO ISS AMBI FWHM END | 0.64 |
| HIERARCH ESO FT ROBJ NAME | HD_42581 |
| HIERARCH ESO FT ROBJ ALPHA | 061034.615 |
| HIERARCH ESO FT ROBJ DELTA | -215152.656 |