Exposure
ID
GRAVI.2025-07-18T08:59:13.988_1
Header ID
GRAVI.2025-07-18T08:59:13.988
Date updated
2025-07-18 09:10:54 UTC+0000
Release date
2025-07-18 08:59:13 UTC+0000
UTC Start
2025-07-18 08:59:13.988
UTC End
2025-07-18 09:02:25.988
MJD Start
60874.37446745
MJD End
60874.37668967222
Exposure time (s)
192.0
Validation level
1
Tau 0: Coherence time (s)
0.0055650000000000005
Ambient temperature (°C)
14.32
Seeing (arcsec)
0.515
Observation
ID
68850
Category
calibrator
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
51220
Name
tau_Cet
RA
26.004599
DEC
-15.93261
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
HIGH-SPLIT
Instrument sub-mode
SINGLE
Stations
A0 G1 J2 K0
Projected baselines
Baseline Length start Length end Angle start Angle end
A0-G1 85.6970 86.1140 110.0000 110.1000
A0-J2 118.0060 118.8100 85.7000 86.0000
A0-K0 115.6320 116.3750 61.6870 62.1350
G1-J2 53.2430 53.4970 44.2000 44.7000
G1-K0 86.7480 86.8470 14.1800 14.6870
J2-K0 48.6020 48.5900 340.9410 341.2330
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 115.27VK.001
HIERARCH ESO DPR CATG CALIB
HIERARCH ESO DPR TYPE STD,SINGLE
MJD-OBS 60874.37446745
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME tau Cet
HIERARCH ESO INS SOBJ NAME tau_Cet
RA 26.004599
DEC -15.93261
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 G1
HIERARCH ESO ISS CONF STATION3 J2
HIERARCH ESO ISS CONF STATION4 K0
EXPTIME 222.0
HIERARCH ESO DET2 SEQ1 DIT 3.0
HIERARCH ESO DET2 NDIT 64
HIERARCH ESO ISS PBL12 START 85.697
HIERARCH ESO ISS PBL12 END 86.114
HIERARCH ESO ISS PBLA12 START 110.0
HIERARCH ESO ISS PBLA12 END 110.1
HIERARCH ESO ISS PBL13 START 118.006
HIERARCH ESO ISS PBL13 END 118.81
HIERARCH ESO ISS PBLA13 START 85.7
HIERARCH ESO ISS PBLA13 END 86.0
HIERARCH ESO ISS PBL14 START 115.632
HIERARCH ESO ISS PBL14 END 116.375
HIERARCH ESO ISS PBLA14 START 61.687
HIERARCH ESO ISS PBLA14 END 62.135
HIERARCH ESO ISS PBL23 START 53.243
HIERARCH ESO ISS PBL23 END 53.497
HIERARCH ESO ISS PBLA23 START 44.2
HIERARCH ESO ISS PBLA23 END 44.7
HIERARCH ESO ISS PBL24 START 86.748
HIERARCH ESO ISS PBL24 END 86.847
HIERARCH ESO ISS PBLA24 START 14.18
HIERARCH ESO ISS PBLA24 END 14.687
HIERARCH ESO ISS PBL34 START 48.602
HIERARCH ESO ISS PBL34 END 48.59
HIERARCH ESO ISS PBLA34 START 340.941
HIERARCH ESO ISS PBLA34 END 341.233
HIERARCH ESO ISS AMBI TAU0 START 0.005182
HIERARCH ESO ISS AMBI TAU0 END 0.005948
HIERARCH ESO ISS AMBI TEMP 14.32
HIERARCH ESO ISS AMBI FWHM START 0.48
HIERARCH ESO ISS AMBI FWHM END 0.55