Exposure
ID
GRAVI.2025-07-18T08:51:01.966_1
Header ID
GRAVI.2025-07-18T08:51:01.966
Date updated
2025-07-18 09:06:27 UTC+0000
Release date
2025-07-18 08:51:01 UTC+0000
UTC Start
2025-07-18 08:51:01.966
UTC End
2025-07-18 08:54:13.966
MJD Start
60874.36877276
MJD End
60874.37099498222
Exposure time (s)
192.0
Validation level
1
Tau 0: Coherence time (s)
0.0055845
Ambient temperature (°C)
14.21
Seeing (arcsec)
0.54
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 84.7110 85.1670 109.7000 109.8000
A0-J2 116.1320 116.9940 85.0000 85.3000
A0-K0 113.9290 114.7080 60.6610 61.1310
G1-J2 52.6690 52.9300 43.0000 43.5000
G1-K0 86.5360 86.6300 13.0460 13.5610
J2-K0 48.6230 48.6140 340.3120 340.5940
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 60874.36877276
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 84.711
HIERARCH ESO ISS PBL12 END 85.167
HIERARCH ESO ISS PBLA12 START 109.7
HIERARCH ESO ISS PBLA12 END 109.8
HIERARCH ESO ISS PBL13 START 116.132
HIERARCH ESO ISS PBL13 END 116.994
HIERARCH ESO ISS PBLA13 START 85.0
HIERARCH ESO ISS PBLA13 END 85.3
HIERARCH ESO ISS PBL14 START 113.929
HIERARCH ESO ISS PBL14 END 114.708
HIERARCH ESO ISS PBLA14 START 60.661
HIERARCH ESO ISS PBLA14 END 61.131
HIERARCH ESO ISS PBL23 START 52.669
HIERARCH ESO ISS PBL23 END 52.93
HIERARCH ESO ISS PBLA23 START 43.0
HIERARCH ESO ISS PBLA23 END 43.5
HIERARCH ESO ISS PBL24 START 86.536
HIERARCH ESO ISS PBL24 END 86.63
HIERARCH ESO ISS PBLA24 START 13.046
HIERARCH ESO ISS PBLA24 END 13.561
HIERARCH ESO ISS PBL34 START 48.623
HIERARCH ESO ISS PBL34 END 48.614
HIERARCH ESO ISS PBLA34 START 340.312
HIERARCH ESO ISS PBLA34 END 340.594
HIERARCH ESO ISS AMBI TAU0 START 0.005987
HIERARCH ESO ISS AMBI TAU0 END 0.005182
HIERARCH ESO ISS AMBI TEMP 14.21
HIERARCH ESO ISS AMBI FWHM START 0.52
HIERARCH ESO ISS AMBI FWHM END 0.56