Exposure
ID
GRAVI.2025-05-20T03:43:50.047_1
Header ID
GRAVI.2025-05-20T03:43:50.047
Date updated
2025-05-20 03:56:06 UTC+0000
Release date
2026-05-20 03:56:06 UTC+0000
UTC Start
2025-05-20 03:43:50.047
UTC End
2025-05-20 03:47:02.047
MJD Start
60815.15544036
MJD End
60815.15766258223
Exposure time (s)
192.0
Validation level
1
Tau 0: Coherence time (s)
0.005086
Ambient temperature (°C)
14.05
Seeing (arcsec)
0.71
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 22.3480 22.4790 131.4000 131.5000
A0-D0 25.8590 26.0570 44.7000 45.5000
A0-C1 17.6260 17.8310 102.2190 102.4410
B2-D0 33.2040 33.2090 2.4000 3.0000
B2-C1 11.0620 11.0630 2.4050 2.9510
D0-C1 22.1430 22.1460 182.4540 183.0020
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 60815.15544036
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 22.348
HIERARCH ESO ISS PBL12 END 22.479
HIERARCH ESO ISS PBLA12 START 131.4
HIERARCH ESO ISS PBLA12 END 131.5
HIERARCH ESO ISS PBL13 START 25.859
HIERARCH ESO ISS PBL13 END 26.057
HIERARCH ESO ISS PBLA13 START 44.7
HIERARCH ESO ISS PBLA13 END 45.5
HIERARCH ESO ISS PBL14 START 17.626
HIERARCH ESO ISS PBL14 END 17.831
HIERARCH ESO ISS PBLA14 START 102.219
HIERARCH ESO ISS PBLA14 END 102.441
HIERARCH ESO ISS PBL23 START 33.204
HIERARCH ESO ISS PBL23 END 33.209
HIERARCH ESO ISS PBLA23 START 2.4
HIERARCH ESO ISS PBLA23 END 3.0
HIERARCH ESO ISS PBL24 START 11.062
HIERARCH ESO ISS PBL24 END 11.063
HIERARCH ESO ISS PBLA24 START 2.405
HIERARCH ESO ISS PBLA24 END 2.951
HIERARCH ESO ISS PBL34 START 22.143
HIERARCH ESO ISS PBL34 END 22.146
HIERARCH ESO ISS PBLA34 START 182.454
HIERARCH ESO ISS PBLA34 END 183.002
HIERARCH ESO ISS AMBI TAU0 START 0.004168
HIERARCH ESO ISS AMBI TAU0 END 0.006004
HIERARCH ESO ISS AMBI TEMP 14.05
HIERARCH ESO ISS AMBI FWHM START 0.75
HIERARCH ESO ISS AMBI FWHM END 0.67