Exposure
- ID
- GRAVI.2021-04-02T06:54:51.239_2
- Header ID
- GRAVI.2021-04-02T06:54:51.239
- Date updated
- 2021-09-29 14:27:08 UTC+0000
- Release date
- 2022-04-02 07:11:03 UTC+0000
- UTC Start
- 2021-04-02 06:54:51.239
- UTC End
- 2021-04-02 07:00:11.239
- MJD Start
- 59306.28809304
- MJD End
- 59306.2917967437
- Exposure time (s)
- 320.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.002703
- Ambient temperature (°C)
- 12.0
- Seeing (arcsec)
- 1.065
Observation
- ID
- 47375
- Category
- science
- Program ID
- 106.217D.002
- Program Title
- HIGH PRECISION GRAVITY ASTROMETRY OF THREE STELLAR CONJUNCTIONS OF ALPHA CENTAURI A & B
- Program Type
- Monitoring
- PI / COI
- KERVELLA/ M\XC3\XA9RAND/ LACOUR/ FORVEILLE/ ARENOU/ THEVENIN/ BRANDNER/ STRAUBMEIER/ GARCIA/ WOILLEZ/ EISENHAUER/ PAUMARD/ PERRIN/ ROUSSELET-PERRAUT
Target
- ID
- 35533
- Name
- AlphaCenB_2021_04_01
- RA
- 219.855329166667
- DEC
- -60.8305047222222
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 | 47.3630 | 47.1510 | 33.6000 | 34.4000 |
| U1-U3 | 87.6320 | 87.2040 | 40.7000 | 41.6000 |
| U1-U4 | 123.3180 | 122.8330 | 68.5390 | 69.7080 |
| U2-U3 | 41.0580 | 40.8520 | 48.9000 | 49.9000 |
| U2-U4 | 88.7640 | 88.6250 | 86.3480 | 87.5990 |
| U3-U4 | 61.4520 | 61.5760 | 110.3050 | 111.5160 |
Header: used keywords
| Key | Value |
|---|---|
| HIERARCH ESO OBS PROG ID | 106.217D.002 |
| HIERARCH ESO DPR CATG | SCIENCE |
| HIERARCH ESO DPR TYPE | OBJECT,DUAL |
| MJD-OBS | 59306.28809304 |
| HIERARCH ESO DPR TECH | INTERFEROMETRY,WOLLASTON |
| HIERARCH ESO OBS TARG NAME | AlphaCenB_2021_04_01 |
| HIERARCH ESO INS SOBJ NAME | StarS1 |
| RA | 219.860366 |
| DEC | -60.83046 |
| HIERARCH ESO INS SPEC RES | MEDIUM |
| HIERARCH ESO INS POLA MODE | SPLIT |
| 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 | 342.0 |
| HIERARCH ESO DET2 SEQ1 DIT | 10.0 |
| HIERARCH ESO DET2 NDIT | 32 |
| HIERARCH ESO ISS PBL12 START | 47.363 |
| HIERARCH ESO ISS PBL12 END | 47.151 |
| HIERARCH ESO ISS PBLA12 START | 33.6 |
| HIERARCH ESO ISS PBLA12 END | 34.4 |
| HIERARCH ESO ISS PBL13 START | 87.632 |
| HIERARCH ESO ISS PBL13 END | 87.204 |
| HIERARCH ESO ISS PBLA13 START | 40.7 |
| HIERARCH ESO ISS PBLA13 END | 41.6 |
| HIERARCH ESO ISS PBL14 START | 123.318 |
| HIERARCH ESO ISS PBL14 END | 122.833 |
| HIERARCH ESO ISS PBLA14 START | 68.539 |
| HIERARCH ESO ISS PBLA14 END | 69.708 |
| HIERARCH ESO ISS PBL23 START | 41.058 |
| HIERARCH ESO ISS PBL23 END | 40.852 |
| HIERARCH ESO ISS PBLA23 START | 48.9 |
| HIERARCH ESO ISS PBLA23 END | 49.9 |
| HIERARCH ESO ISS PBL24 START | 88.764 |
| HIERARCH ESO ISS PBL24 END | 88.625 |
| HIERARCH ESO ISS PBLA24 START | 86.348 |
| HIERARCH ESO ISS PBLA24 END | 87.599 |
| HIERARCH ESO ISS PBL34 START | 61.452 |
| HIERARCH ESO ISS PBL34 END | 61.576 |
| HIERARCH ESO ISS PBLA34 START | 110.305 |
| HIERARCH ESO ISS PBLA34 END | 111.516 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.003017 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.002389 |
| HIERARCH ESO ISS AMBI TEMP | 12.0 |
| HIERARCH ESO ISS AMBI FWHM START | 0.98 |
| HIERARCH ESO ISS AMBI FWHM END | 1.15 |
| HIERARCH ESO FT ROBJ NAME | AlphaCenB_2021_04_01 |
| HIERARCH ESO FT ROBJ ALPHA | 143925.279 |
| HIERARCH ESO FT ROBJ DELTA | -604949.817 |