Exposure
ID
GRAVI.2021-11-27T04:42:49.594_1
Header ID
GRAVI.2021-11-27T04:42:49.594
Date updated
2021-11-27 04:55:53 UTC+0000
Release date
2022-11-27 04:55:53 UTC+0000
UTC Start
2021-11-27 04:42:49.594
UTC End
2021-11-27 04:44:25.594
MJD Start
59545.19640734
MJD End
59545.1975184511
Exposure time (s)
96.0
Validation level
1
Tau 0: Coherence time (s)
0.0041185
Ambient temperature (°C)
11.88
Seeing (arcsec)
0.74
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 24.9470 24.9050 135.8000 135.7000
A0-D0 27.3320 27.5550 74.4000 74.4000
A0-C1 22.4570 22.4910 114.9120 114.7680
B2-D0 26.7690 26.8670 19.4000 19.9000
B2-C1 8.9180 8.9510 19.3860 19.8710
D0-C1 17.8510 17.9170 199.4650 199.9490
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 59545.19640734
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 24.947
HIERARCH ESO ISS PBL12 END 24.905
HIERARCH ESO ISS PBLA12 START 135.8
HIERARCH ESO ISS PBLA12 END 135.7
HIERARCH ESO ISS PBL13 START 27.332
HIERARCH ESO ISS PBL13 END 27.555
HIERARCH ESO ISS PBLA13 START 74.4
HIERARCH ESO ISS PBLA13 END 74.4
HIERARCH ESO ISS PBL14 START 22.457
HIERARCH ESO ISS PBL14 END 22.491
HIERARCH ESO ISS PBLA14 START 114.912
HIERARCH ESO ISS PBLA14 END 114.768
HIERARCH ESO ISS PBL23 START 26.769
HIERARCH ESO ISS PBL23 END 26.867
HIERARCH ESO ISS PBLA23 START 19.4
HIERARCH ESO ISS PBLA23 END 19.9
HIERARCH ESO ISS PBL24 START 8.918
HIERARCH ESO ISS PBL24 END 8.951
HIERARCH ESO ISS PBLA24 START 19.386
HIERARCH ESO ISS PBLA24 END 19.871
HIERARCH ESO ISS PBL34 START 17.851
HIERARCH ESO ISS PBL34 END 17.917
HIERARCH ESO ISS PBLA34 START 199.465
HIERARCH ESO ISS PBLA34 END 199.949
HIERARCH ESO ISS AMBI TAU0 START 0.003896
HIERARCH ESO ISS AMBI TAU0 END 0.004341
HIERARCH ESO ISS AMBI TEMP 11.88
HIERARCH ESO ISS AMBI FWHM START 0.74
HIERARCH ESO ISS AMBI FWHM END 0.74