Exposure
ID
GRAVI.2021-05-22T23:52:28.415_1
Header ID
GRAVI.2021-05-22T23:52:28.415
Date updated
2021-09-29 14:27:19 UTC+0000
Release date
2022-05-23 00:12:03 UTC+0000
UTC Start
2021-05-22 23:52:28.415
UTC End
2021-05-22 23:57:48.415
MJD Start
59356.99477332
MJD End
59356.9984770237
Exposure time (s)
320.0
Validation level
1
Tau 0: Coherence time (s)
0.005788
Ambient temperature (°C)
11.95
Seeing (arcsec)
0.445
Observation
ID
47437
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
35577
Name
StarS1
RA
219.859958
DEC
-60.83039
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
MEDIUM-SPLIT
Instrument sub-mode
DUAL
Stations
U1 U2 U3 U4
Projected baselines
Baseline Length start Length end Angle start Angle end
U1-U2 50.9640 50.9690 358.6000 359.5000
U1-U3 95.5360 95.5050 3.4000 4.4000
U1-U4 130.2100 130.2090 22.1620 23.4160
U2-U3 44.9550 44.9310 8.9000 9.9000
U2-U4 85.9480 86.1250 35.8750 37.2890
U3-U4 50.2380 50.6290 59.8610 61.3670
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 59356.99477332
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME AlphaCenB_2021_05_22
HIERARCH ESO INS SOBJ NAME StarS1
RA 219.859958
DEC -60.83039
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 50.964
HIERARCH ESO ISS PBL12 END 50.969
HIERARCH ESO ISS PBLA12 START 358.6
HIERARCH ESO ISS PBLA12 END 359.5
HIERARCH ESO ISS PBL13 START 95.536
HIERARCH ESO ISS PBL13 END 95.505
HIERARCH ESO ISS PBLA13 START 3.4
HIERARCH ESO ISS PBLA13 END 4.4
HIERARCH ESO ISS PBL14 START 130.21
HIERARCH ESO ISS PBL14 END 130.209
HIERARCH ESO ISS PBLA14 START 22.162
HIERARCH ESO ISS PBLA14 END 23.416
HIERARCH ESO ISS PBL23 START 44.955
HIERARCH ESO ISS PBL23 END 44.931
HIERARCH ESO ISS PBLA23 START 8.9
HIERARCH ESO ISS PBLA23 END 9.9
HIERARCH ESO ISS PBL24 START 85.948
HIERARCH ESO ISS PBL24 END 86.125
HIERARCH ESO ISS PBLA24 START 35.875
HIERARCH ESO ISS PBLA24 END 37.289
HIERARCH ESO ISS PBL34 START 50.238
HIERARCH ESO ISS PBL34 END 50.629
HIERARCH ESO ISS PBLA34 START 59.861
HIERARCH ESO ISS PBLA34 END 61.367
HIERARCH ESO ISS AMBI TAU0 START 0.006685
HIERARCH ESO ISS AMBI TAU0 END 0.004891
HIERARCH ESO ISS AMBI TEMP 11.95
HIERARCH ESO ISS AMBI FWHM START 0.41
HIERARCH ESO ISS AMBI FWHM END 0.48
HIERARCH ESO FT ROBJ NAME AlphaCenB_2021_05_22
HIERARCH ESO FT ROBJ ALPHA 143925.133
HIERARCH ESO FT ROBJ DELTA -604949.581