Exposure
ID
GRAVI.2025-08-23T02:48:38.940_1
Header ID
GRAVI.2025-08-23T02:48:38.940
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 02:48:38.940
UTC End
2025-08-23 02:51:18.940
MJD Start
60910.11711736
MJD End
60910.11896921186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.0023095
Ambient temperature (°C)
2.37
Seeing (arcsec)
1.045
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 48.6330 48.6310 175.1000 175.6000
A0-J2 107.1060 106.4530 122.4000 123.0000
A0-J6 147.0890 146.4860 41.6060 41.7670
B5-J2 86.7920 86.0380 95.9000 96.4000
B5-J6 184.0040 183.5500 30.5610 30.7470
J2-J6 167.5200 167.5130 2.4690 2.8490
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 60910.11711736
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 48.633
HIERARCH ESO ISS PBL12 END 48.631
HIERARCH ESO ISS PBLA12 START 175.1
HIERARCH ESO ISS PBLA12 END 175.6
HIERARCH ESO ISS PBL13 START 107.106
HIERARCH ESO ISS PBL13 END 106.453
HIERARCH ESO ISS PBLA13 START 122.4
HIERARCH ESO ISS PBLA13 END 123.0
HIERARCH ESO ISS PBL14 START 147.089
HIERARCH ESO ISS PBL14 END 146.486
HIERARCH ESO ISS PBLA14 START 41.606
HIERARCH ESO ISS PBLA14 END 41.767
HIERARCH ESO ISS PBL23 START 86.792
HIERARCH ESO ISS PBL23 END 86.038
HIERARCH ESO ISS PBLA23 START 95.9
HIERARCH ESO ISS PBLA23 END 96.4
HIERARCH ESO ISS PBL24 START 184.004
HIERARCH ESO ISS PBL24 END 183.55
HIERARCH ESO ISS PBLA24 START 30.561
HIERARCH ESO ISS PBLA24 END 30.747
HIERARCH ESO ISS PBL34 START 167.52
HIERARCH ESO ISS PBL34 END 167.513
HIERARCH ESO ISS PBLA34 START 2.469
HIERARCH ESO ISS PBLA34 END 2.849
HIERARCH ESO ISS AMBI TAU0 START 0.002211
HIERARCH ESO ISS AMBI TAU0 END 0.002408
HIERARCH ESO ISS AMBI TEMP 2.37
HIERARCH ESO ISS AMBI FWHM START 1.05
HIERARCH ESO ISS AMBI FWHM END 1.04