Exposure
ID
GRAVI.2021-11-27T05:25:55.703_1
Header ID
GRAVI.2021-11-27T05:25:55.703
Date updated
2021-11-27 05:40:57 UTC+0000
Release date
2022-11-27 05:40:57 UTC+0000
UTC Start
2021-11-27 05:25:55.703
UTC End
2021-11-27 05:27:31.703
MJD Start
59545.22633915
MJD End
59545.2274502611
Exposure time (s)
96.0
Validation level
1
Tau 0: Coherence time (s)
0.005478
Ambient temperature (°C)
11.6
Seeing (arcsec)
0.57
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 24.1910 24.1180 136.2000 136.3000
A0-D0 29.8700 30.0220 74.4000 74.4000
A0-C1 22.5970 22.5810 113.3580 113.2720
B2-D0 28.1860 28.2990 25.2000 25.6000
B2-C1 9.3890 9.4260 25.1820 25.5590
D0-C1 18.7970 18.8720 205.2570 205.6340
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 59545.22633915
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 24.191
HIERARCH ESO ISS PBL12 END 24.118
HIERARCH ESO ISS PBLA12 START 136.2
HIERARCH ESO ISS PBLA12 END 136.3
HIERARCH ESO ISS PBL13 START 29.87
HIERARCH ESO ISS PBL13 END 30.022
HIERARCH ESO ISS PBLA13 START 74.4
HIERARCH ESO ISS PBLA13 END 74.4
HIERARCH ESO ISS PBL14 START 22.597
HIERARCH ESO ISS PBL14 END 22.581
HIERARCH ESO ISS PBLA14 START 113.358
HIERARCH ESO ISS PBLA14 END 113.272
HIERARCH ESO ISS PBL23 START 28.186
HIERARCH ESO ISS PBL23 END 28.299
HIERARCH ESO ISS PBLA23 START 25.2
HIERARCH ESO ISS PBLA23 END 25.6
HIERARCH ESO ISS PBL24 START 9.389
HIERARCH ESO ISS PBL24 END 9.426
HIERARCH ESO ISS PBLA24 START 25.182
HIERARCH ESO ISS PBLA24 END 25.559
HIERARCH ESO ISS PBL34 START 18.797
HIERARCH ESO ISS PBL34 END 18.872
HIERARCH ESO ISS PBLA34 START 205.257
HIERARCH ESO ISS PBLA34 END 205.634
HIERARCH ESO ISS AMBI TAU0 START 0.004799
HIERARCH ESO ISS AMBI TAU0 END 0.006157
HIERARCH ESO ISS AMBI TEMP 11.6
HIERARCH ESO ISS AMBI FWHM START 0.53
HIERARCH ESO ISS AMBI FWHM END 0.61