Exposure
ID
GRAVI.2025-05-20T03:52:05.068_1
Header ID
GRAVI.2025-05-20T03:52:05.068
Date updated
2025-05-20 04:05:59 UTC+0000
Release date
2026-05-20 04:05:58 UTC+0000
UTC Start
2025-05-20 03:52:05.068
UTC End
2025-05-20 03:55:17.068
MJD Start
60815.16116977
MJD End
60815.163391992224
Exposure time (s)
192.0
Validation level
1
Tau 0: Coherence time (s)
0.006798
Ambient temperature (°C)
13.92
Seeing (arcsec)
0.63
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 22.6360 22.7600 131.6000 131.7000
A0-D0 26.2990 26.4950 46.4000 47.2000
A0-C1 18.0760 18.2720 102.7160 102.9420
B2-D0 33.2170 33.2240 3.7000 4.2000
B2-C1 11.0660 11.0680 3.6200 4.1630
D0-C1 22.1510 22.1550 183.6720 184.2150
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 60815.16116977
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 22.636
HIERARCH ESO ISS PBL12 END 22.76
HIERARCH ESO ISS PBLA12 START 131.6
HIERARCH ESO ISS PBLA12 END 131.7
HIERARCH ESO ISS PBL13 START 26.299
HIERARCH ESO ISS PBL13 END 26.495
HIERARCH ESO ISS PBLA13 START 46.4
HIERARCH ESO ISS PBLA13 END 47.2
HIERARCH ESO ISS PBL14 START 18.076
HIERARCH ESO ISS PBL14 END 18.272
HIERARCH ESO ISS PBLA14 START 102.716
HIERARCH ESO ISS PBLA14 END 102.942
HIERARCH ESO ISS PBL23 START 33.217
HIERARCH ESO ISS PBL23 END 33.224
HIERARCH ESO ISS PBLA23 START 3.7
HIERARCH ESO ISS PBLA23 END 4.2
HIERARCH ESO ISS PBL24 START 11.066
HIERARCH ESO ISS PBL24 END 11.068
HIERARCH ESO ISS PBLA24 START 3.62
HIERARCH ESO ISS PBLA24 END 4.163
HIERARCH ESO ISS PBL34 START 22.151
HIERARCH ESO ISS PBL34 END 22.155
HIERARCH ESO ISS PBLA34 START 183.672
HIERARCH ESO ISS PBLA34 END 184.215
HIERARCH ESO ISS AMBI TAU0 START 0.005682
HIERARCH ESO ISS AMBI TAU0 END 0.007914
HIERARCH ESO ISS AMBI TEMP 13.92
HIERARCH ESO ISS AMBI FWHM START 0.65
HIERARCH ESO ISS AMBI FWHM END 0.61