Exposure
ID
GRAVI.2025-08-23T02:45:23.932_1
Header ID
GRAVI.2025-08-23T02:45:23.932
Date updated
2025-08-23 02:55:43 UTC+0000
Release date
2026-08-23 02:55:42 UTC+0000
UTC Start
2025-08-23 02:45:23.932
UTC End
2025-08-23 02:48:03.932
MJD Start
60910.11486032
MJD End
60910.11671217185
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.002211
Ambient temperature (°C)
2.4
Seeing (arcsec)
1.025
Observation
ID
70072
Category
science
Program ID
115.27VK.001
Program Title
UNVEILING THE MASS-LOSS PROCESS OF RED SUPERGIANTS: THE VARIABILITY ACROSS THE MOLECULAR LAYERS AND THE PHOTOSPHERE
Program Type
Normal
PI / COI
JADLOVSKY / WITTKOWSKI / CHIAVASSA / KRAVCHENKO / GONZÁLEZ-TORÀ / KRTICKA / PALADINI / HÖFNER / FREYTAG
Target
ID
51987
Name
HD_155666
RA
258.626674
DEC
-34.80753
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
HIGH-SPLIT
Instrument sub-mode
SINGLE
Stations
A0 B5 J2 J6
Projected baselines
Baseline Length start Length end Angle start Angle end
A0-B5 48.6340 48.6330 174.7000 175.1000
A0-J2 107.8150 107.1710 121.7000 122.3000
A0-J6 147.7390 147.1490 41.4260 41.5900
B5-J2 87.6080 86.8680 95.4000 95.8000
B5-J6 184.4920 184.0500 30.3540 30.5420
J2-J6 167.5250 167.5200 2.0530 2.4310
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 115.27VK.001
HIERARCH ESO DPR CATG SCIENCE
HIERARCH ESO DPR TYPE OBJECT,SINGLE
MJD-OBS 60910.11486032
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME HD 155666
HIERARCH ESO INS SOBJ NAME HD_155666
RA 258.626674
DEC -34.80753
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 B5
HIERARCH ESO ISS CONF STATION3 J2
HIERARCH ESO ISS CONF STATION4 J6
EXPTIME 178.0
HIERARCH ESO DET2 SEQ1 DIT 10.0
HIERARCH ESO DET2 NDIT 16
HIERARCH ESO ISS PBL12 START 48.634
HIERARCH ESO ISS PBL12 END 48.633
HIERARCH ESO ISS PBLA12 START 174.7
HIERARCH ESO ISS PBLA12 END 175.1
HIERARCH ESO ISS PBL13 START 107.815
HIERARCH ESO ISS PBL13 END 107.171
HIERARCH ESO ISS PBLA13 START 121.7
HIERARCH ESO ISS PBLA13 END 122.3
HIERARCH ESO ISS PBL14 START 147.739
HIERARCH ESO ISS PBL14 END 147.149
HIERARCH ESO ISS PBLA14 START 41.426
HIERARCH ESO ISS PBLA14 END 41.59
HIERARCH ESO ISS PBL23 START 87.608
HIERARCH ESO ISS PBL23 END 86.868
HIERARCH ESO ISS PBLA23 START 95.4
HIERARCH ESO ISS PBLA23 END 95.8
HIERARCH ESO ISS PBL24 START 184.492
HIERARCH ESO ISS PBL24 END 184.05
HIERARCH ESO ISS PBLA24 START 30.354
HIERARCH ESO ISS PBLA24 END 30.542
HIERARCH ESO ISS PBL34 START 167.525
HIERARCH ESO ISS PBL34 END 167.52
HIERARCH ESO ISS PBLA34 START 2.053
HIERARCH ESO ISS PBLA34 END 2.431
HIERARCH ESO ISS AMBI TAU0 START 0.002211
HIERARCH ESO ISS AMBI TAU0 END 0.002211
HIERARCH ESO ISS AMBI TEMP 2.4
HIERARCH ESO ISS AMBI FWHM START 1.03
HIERARCH ESO ISS AMBI FWHM END 1.02