Exposure
ID
GRAVI.2025-04-05T05:44:01.271_1
Header ID
GRAVI.2025-04-05T05:44:01.271
Date updated
2025-04-05 05:55:39 UTC+0000
Release date
2026-04-05 05:55:39 UTC+0000
UTC Start
2025-04-05 05:44:01.271
UTC End
2025-04-05 05:47:13.271
MJD Start
60770.2389036
MJD End
60770.24112582223
Exposure time (s)
192.0
Validation level
1
Tau 0: Coherence time (s)
0.0101265
Ambient temperature (°C)
14.46
Seeing (arcsec)
0.35
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 19.9980 20.1700 131.4000 131.3000
A0-D0 22.9910 23.1590 30.3000 31.3000
A0-C1 14.0360 14.2950 99.0230 99.2210
B2-D0 33.2520 33.2420 354.1000 354.6000
B2-C1 11.0780 11.0750 354.0670 354.6050
D0-C1 22.1740 22.1680 174.1060 174.6450
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 60770.2389036
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 19.998
HIERARCH ESO ISS PBL12 END 20.17
HIERARCH ESO ISS PBLA12 START 131.4
HIERARCH ESO ISS PBLA12 END 131.3
HIERARCH ESO ISS PBL13 START 22.991
HIERARCH ESO ISS PBL13 END 23.159
HIERARCH ESO ISS PBLA13 START 30.3
HIERARCH ESO ISS PBLA13 END 31.3
HIERARCH ESO ISS PBL14 START 14.036
HIERARCH ESO ISS PBL14 END 14.295
HIERARCH ESO ISS PBLA14 START 99.023
HIERARCH ESO ISS PBLA14 END 99.221
HIERARCH ESO ISS PBL23 START 33.252
HIERARCH ESO ISS PBL23 END 33.242
HIERARCH ESO ISS PBLA23 START 354.1
HIERARCH ESO ISS PBLA23 END 354.6
HIERARCH ESO ISS PBL24 START 11.078
HIERARCH ESO ISS PBL24 END 11.075
HIERARCH ESO ISS PBLA24 START 354.067
HIERARCH ESO ISS PBLA24 END 354.605
HIERARCH ESO ISS PBL34 START 22.174
HIERARCH ESO ISS PBL34 END 22.168
HIERARCH ESO ISS PBLA34 START 174.106
HIERARCH ESO ISS PBLA34 END 174.645
HIERARCH ESO ISS AMBI TAU0 START 0.010178
HIERARCH ESO ISS AMBI TAU0 END 0.010075
HIERARCH ESO ISS AMBI TEMP 14.46
HIERARCH ESO ISS AMBI FWHM START 0.34
HIERARCH ESO ISS AMBI FWHM END 0.36