Exposure
ID
GRAVI.2021-11-27T06:09:07.811_1
Header ID
GRAVI.2021-11-27T06:09:07.811
Date updated
2021-11-27 06:27:12 UTC+0000
Release date
2022-11-27 06:27:12 UTC+0000
UTC Start
2021-11-27 06:09:07.811
UTC End
2021-11-27 06:10:43.811
MJD Start
59545.25634041
MJD End
59545.2574515211
Exposure time (s)
96.0
Validation level
1
Tau 0: Coherence time (s)
0.005341
Ambient temperature (°C)
11.11
Seeing (arcsec)
0.685
Observation
ID
49038
Category
science
Program ID
108.224U.001
Program Title
SPATIALLY RESOLVING BETELGEUSE AND VY CMA, THE CORNERSTONES OF THE RED SUPERGIANT FAMILY
Program Type
Normal
PI / COI
MONTARGES/ LEBRE/ DUPREE/ HUMPHREYS/ CANNON/ LAGADEC/ SCICLUNA/ KERVELLA/ DE KOTER/ LOPEZ ARISTE/ SANCHEZ/ PALADINI/ DECIN/ KRAVCHENKO/ WITTKOWSKI/ NORRIS/ CHIAVASSA/ RIDGWAY/ PERRIN/ HAUBOIS/ CANTALLOUBE/ RAU/ BRUNO
Target
ID
36687
Name
Betelgeuse
RA
88.790833
DEC
7.40712
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
HIGH-SPLIT
Instrument sub-mode
SINGLE
Stations
A0 B2 D0 C1
Projected baselines
Baseline Length start Length end Angle start Angle end
A0-B2 23.0460 22.9460 137.8000 137.9000
A0-D0 31.4460 31.5240 73.8000 73.8000
A0-C1 22.0700 22.0030 112.5300 112.4970
B2-D0 29.7160 29.8300 29.7000 29.9000
B2-C1 9.8980 9.9360 29.6130 29.8920
D0-C1 19.8180 19.8940 209.6820 209.9610
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 108.224U.001
HIERARCH ESO DPR CATG SCIENCE
HIERARCH ESO DPR TYPE OBJECT,SINGLE
MJD-OBS 59545.25634041
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME Betelgeuse
HIERARCH ESO INS SOBJ NAME Betelgeuse
RA 88.790833
DEC 7.40712
HIERARCH ESO INS SPEC RES HIGH
HIERARCH ESO INS POLA MODE SPLIT
HIERARCH ESO ISS CONF NTEL 4
HIERARCH ESO ISS CONF STATION1 A0
HIERARCH ESO ISS CONF STATION2 B2
HIERARCH ESO ISS CONF STATION3 D0
HIERARCH ESO ISS CONF STATION4 C1
EXPTIME 194.0
HIERARCH ESO DET2 SEQ1 DIT 0.3
HIERARCH ESO DET2 NDIT 320
HIERARCH ESO ISS PBL12 START 23.046
HIERARCH ESO ISS PBL12 END 22.946
HIERARCH ESO ISS PBLA12 START 137.8
HIERARCH ESO ISS PBLA12 END 137.9
HIERARCH ESO ISS PBL13 START 31.446
HIERARCH ESO ISS PBL13 END 31.524
HIERARCH ESO ISS PBLA13 START 73.8
HIERARCH ESO ISS PBLA13 END 73.8
HIERARCH ESO ISS PBL14 START 22.07
HIERARCH ESO ISS PBL14 END 22.003
HIERARCH ESO ISS PBLA14 START 112.53
HIERARCH ESO ISS PBLA14 END 112.497
HIERARCH ESO ISS PBL23 START 29.716
HIERARCH ESO ISS PBL23 END 29.83
HIERARCH ESO ISS PBLA23 START 29.7
HIERARCH ESO ISS PBLA23 END 29.9
HIERARCH ESO ISS PBL24 START 9.898
HIERARCH ESO ISS PBL24 END 9.936
HIERARCH ESO ISS PBLA24 START 29.613
HIERARCH ESO ISS PBLA24 END 29.892
HIERARCH ESO ISS PBL34 START 19.818
HIERARCH ESO ISS PBL34 END 19.894
HIERARCH ESO ISS PBLA34 START 209.682
HIERARCH ESO ISS PBLA34 END 209.961
HIERARCH ESO ISS AMBI TAU0 START 0.004856
HIERARCH ESO ISS AMBI TAU0 END 0.005826
HIERARCH ESO ISS AMBI TEMP 11.11
HIERARCH ESO ISS AMBI FWHM START 0.7
HIERARCH ESO ISS AMBI FWHM END 0.67