Exposure
ID
GRAVI.2025-08-23T02:55:17.957_1
Header ID
GRAVI.2025-08-23T02:55:17.957
Date updated
2025-08-23 03:06:15 UTC+0000
Release date
2026-08-23 03:06:14 UTC+0000
UTC Start
2025-08-23 02:55:17.957
UTC End
2025-08-23 02:57:57.957
MJD Start
60910.12173561
MJD End
60910.12358746186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.0024655
Ambient temperature (°C)
2.34
Seeing (arcsec)
0.99
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 48.6300 48.6290 176.1000 176.6000
A0-J2 105.6460 104.9900 123.8000 124.5000
A0-J6 145.7310 145.1110 41.9590 42.1110
B5-J2 85.0970 84.3280 97.0000 97.5000
B5-J6 182.9810 182.5120 30.9720 31.1500
J2-J6 167.5050 167.4960 3.3150 3.6920
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 60910.12173561
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 48.63
HIERARCH ESO ISS PBL12 END 48.629
HIERARCH ESO ISS PBLA12 START 176.1
HIERARCH ESO ISS PBLA12 END 176.6
HIERARCH ESO ISS PBL13 START 105.646
HIERARCH ESO ISS PBL13 END 104.99
HIERARCH ESO ISS PBLA13 START 123.8
HIERARCH ESO ISS PBLA13 END 124.5
HIERARCH ESO ISS PBL14 START 145.731
HIERARCH ESO ISS PBL14 END 145.111
HIERARCH ESO ISS PBLA14 START 41.959
HIERARCH ESO ISS PBLA14 END 42.111
HIERARCH ESO ISS PBL23 START 85.097
HIERARCH ESO ISS PBL23 END 84.328
HIERARCH ESO ISS PBLA23 START 97.0
HIERARCH ESO ISS PBLA23 END 97.5
HIERARCH ESO ISS PBL24 START 182.981
HIERARCH ESO ISS PBL24 END 182.512
HIERARCH ESO ISS PBLA24 START 30.972
HIERARCH ESO ISS PBLA24 END 31.15
HIERARCH ESO ISS PBL34 START 167.505
HIERARCH ESO ISS PBL34 END 167.496
HIERARCH ESO ISS PBLA34 START 3.315
HIERARCH ESO ISS PBLA34 END 3.692
HIERARCH ESO ISS AMBI TAU0 START 0.002586
HIERARCH ESO ISS AMBI TAU0 END 0.002345
HIERARCH ESO ISS AMBI TEMP 2.34
HIERARCH ESO ISS AMBI FWHM START 0.94
HIERARCH ESO ISS AMBI FWHM END 1.04