Exposure
ID
GRAVI.2025-05-20T03:35:35.026_1
Header ID
GRAVI.2025-05-20T03:35:35.026
Date updated
2025-05-20 03:45:47 UTC+0000
Release date
2026-05-20 03:45:47 UTC+0000
UTC Start
2025-05-20 03:35:35.026
UTC End
2025-05-20 03:38:47.026
MJD Start
60815.14971095
MJD End
60815.15193317222
Exposure time (s)
192.0
Validation level
1
Tau 0: Coherence time (s)
0.0039725
Ambient temperature (°C)
13.96
Seeing (arcsec)
0.865
Observation
ID
66044
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
49163
Name
V774_Sgr
RA
268.606471
DEC
-23.23601
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 22.0460 22.1830 131.3000 131.3000
A0-D0 25.4200 25.6160 42.8000 43.6000
A0-C1 17.1560 17.3690 101.7300 101.9480
B2-D0 33.1970 33.2000 1.2000 1.8000
B2-C1 11.0590 11.0600 1.1880 1.7340
D0-C1 22.1380 22.1390 181.2360 181.7830
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 60815.14971095
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME V V774 Sgr
HIERARCH ESO INS SOBJ NAME V774_Sgr
RA 268.606471
DEC -23.23601
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 222.0
HIERARCH ESO DET2 SEQ1 DIT 3.0
HIERARCH ESO DET2 NDIT 64
HIERARCH ESO ISS PBL12 START 22.046
HIERARCH ESO ISS PBL12 END 22.183
HIERARCH ESO ISS PBLA12 START 131.3
HIERARCH ESO ISS PBLA12 END 131.3
HIERARCH ESO ISS PBL13 START 25.42
HIERARCH ESO ISS PBL13 END 25.616
HIERARCH ESO ISS PBLA13 START 42.8
HIERARCH ESO ISS PBLA13 END 43.6
HIERARCH ESO ISS PBL14 START 17.156
HIERARCH ESO ISS PBL14 END 17.369
HIERARCH ESO ISS PBLA14 START 101.73
HIERARCH ESO ISS PBLA14 END 101.948
HIERARCH ESO ISS PBL23 START 33.197
HIERARCH ESO ISS PBL23 END 33.2
HIERARCH ESO ISS PBLA23 START 1.2
HIERARCH ESO ISS PBLA23 END 1.8
HIERARCH ESO ISS PBL24 START 11.059
HIERARCH ESO ISS PBL24 END 11.06
HIERARCH ESO ISS PBLA24 START 1.188
HIERARCH ESO ISS PBLA24 END 1.734
HIERARCH ESO ISS PBL34 START 22.138
HIERARCH ESO ISS PBL34 END 22.139
HIERARCH ESO ISS PBLA34 START 181.236
HIERARCH ESO ISS PBLA34 END 181.783
HIERARCH ESO ISS AMBI TAU0 START 0.00455
HIERARCH ESO ISS AMBI TAU0 END 0.003395
HIERARCH ESO ISS AMBI TEMP 13.96
HIERARCH ESO ISS AMBI FWHM START 0.86
HIERARCH ESO ISS AMBI FWHM END 0.87