Exposure
ID
GRAVI.2021-09-01T08:25:01.999_1
Header ID
GRAVI.2021-09-01T08:25:01.999
Date updated
2021-09-01 08:41:06 UTC+0000
Release date
2022-09-01 08:41:06 UTC+0000
UTC Start
2021-09-01 08:25:01.999
UTC End
2021-09-01 08:26:37.999
MJD Start
59458.35071758
MJD End
59458.3518286911
Exposure time (s)
96.0
Validation level
1
Tau 0: Coherence time (s)
0.0033865
Ambient temperature (°C)
12.49
Seeing (arcsec)
0.615
Observation
ID
48061
Category
science
Program ID
104.20UZ.001
Program Title
BETELGEUSE IS BECOMING FAINTER: THE HIGH ANGULAR RESOLUTION RESPONSE
Program Type
ToO
PI / COI
MONTARGES/ CANTALLOUBE/ HUBY/ CANNON/ KERVELLA/ LAGADEC/ DUPREE/ DECIN/ LEBRE/ PERRIN/ LOPEZ ARISTE
Target
ID
36067
Name
Betelgeuse
RA
88.790831
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 24.8610 24.9020 139.9000 139.7000
A0-D0 16.1310 16.4880 68.4000 68.8000
A0-C1 18.9700 19.1110 124.3540 123.9620
B2-D0 24.9910 24.9800 357.7000 358.3000
B2-C1 8.3290 8.3250 357.6360 358.2650
D0-C1 16.6620 16.6550 177.6930 178.3240
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 104.20UZ.001
HIERARCH ESO DPR CATG SCIENCE
HIERARCH ESO DPR TYPE OBJECT,SINGLE
MJD-OBS 59458.35071758
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME Betelgeuse
HIERARCH ESO INS SOBJ NAME Betelgeuse
RA 88.790831
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 24.861
HIERARCH ESO ISS PBL12 END 24.902
HIERARCH ESO ISS PBLA12 START 139.9
HIERARCH ESO ISS PBLA12 END 139.7
HIERARCH ESO ISS PBL13 START 16.131
HIERARCH ESO ISS PBL13 END 16.488
HIERARCH ESO ISS PBLA13 START 68.4
HIERARCH ESO ISS PBLA13 END 68.8
HIERARCH ESO ISS PBL14 START 18.97
HIERARCH ESO ISS PBL14 END 19.111
HIERARCH ESO ISS PBLA14 START 124.354
HIERARCH ESO ISS PBLA14 END 123.962
HIERARCH ESO ISS PBL23 START 24.991
HIERARCH ESO ISS PBL23 END 24.98
HIERARCH ESO ISS PBLA23 START 357.7
HIERARCH ESO ISS PBLA23 END 358.3
HIERARCH ESO ISS PBL24 START 8.329
HIERARCH ESO ISS PBL24 END 8.325
HIERARCH ESO ISS PBLA24 START 357.636
HIERARCH ESO ISS PBLA24 END 358.265
HIERARCH ESO ISS PBL34 START 16.662
HIERARCH ESO ISS PBL34 END 16.655
HIERARCH ESO ISS PBLA34 START 177.693
HIERARCH ESO ISS PBLA34 END 178.324
HIERARCH ESO ISS AMBI TAU0 START 0.003587
HIERARCH ESO ISS AMBI TAU0 END 0.003186
HIERARCH ESO ISS AMBI TEMP 12.49
HIERARCH ESO ISS AMBI FWHM START 0.62
HIERARCH ESO ISS AMBI FWHM END 0.61