Exposure
ID
GRAVI.2025-04-05T06:00:37.313_1
Header ID
GRAVI.2025-04-05T06:00:37.313
Date updated
2025-04-05 06:10:44 UTC+0000
Release date
2026-04-05 06:10:44 UTC+0000
UTC Start
2025-04-05 06:00:37.313
UTC End
2025-04-05 06:03:49.313
MJD Start
60770.25043186
MJD End
60770.25265408222
Exposure time (s)
192.0
Validation level
1
Tau 0: Coherence time (s)
0.0073195
Ambient temperature (°C)
14.18
Seeing (arcsec)
0.475
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 20.7480 20.9090 131.2000 131.2000
A0-D0 23.7730 23.9570 34.9000 35.9000
A0-C1 15.1690 15.4130 99.9190 100.1240
B2-D0 33.2150 33.2090 356.5000 357.1000
B2-C1 11.0650 11.0630 356.4860 357.0300
D0-C1 22.1490 22.1450 176.5280 177.0730
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 60770.25043186
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 20.748
HIERARCH ESO ISS PBL12 END 20.909
HIERARCH ESO ISS PBLA12 START 131.2
HIERARCH ESO ISS PBLA12 END 131.2
HIERARCH ESO ISS PBL13 START 23.773
HIERARCH ESO ISS PBL13 END 23.957
HIERARCH ESO ISS PBLA13 START 34.9
HIERARCH ESO ISS PBLA13 END 35.9
HIERARCH ESO ISS PBL14 START 15.169
HIERARCH ESO ISS PBL14 END 15.413
HIERARCH ESO ISS PBLA14 START 99.919
HIERARCH ESO ISS PBLA14 END 100.124
HIERARCH ESO ISS PBL23 START 33.215
HIERARCH ESO ISS PBL23 END 33.209
HIERARCH ESO ISS PBLA23 START 356.5
HIERARCH ESO ISS PBLA23 END 357.1
HIERARCH ESO ISS PBL24 START 11.065
HIERARCH ESO ISS PBL24 END 11.063
HIERARCH ESO ISS PBLA24 START 356.486
HIERARCH ESO ISS PBLA24 END 357.03
HIERARCH ESO ISS PBL34 START 22.149
HIERARCH ESO ISS PBL34 END 22.145
HIERARCH ESO ISS PBLA34 START 176.528
HIERARCH ESO ISS PBLA34 END 177.073
HIERARCH ESO ISS AMBI TAU0 START 0.007439
HIERARCH ESO ISS AMBI TAU0 END 0.0072
HIERARCH ESO ISS AMBI TEMP 14.18
HIERARCH ESO ISS AMBI FWHM START 0.47
HIERARCH ESO ISS AMBI FWHM END 0.48