Exposure
ID
GRAVI.2025-07-24T04:45:49.548_1
Header ID
GRAVI.2025-07-24T04:45:49.548
Date updated
2025-07-24 04:55:57 UTC+0000
Release date
2026-07-24 04:55:57 UTC+0000
UTC Start
2025-07-24 04:45:49.548
UTC End
2025-07-24 04:48:29.548
MJD Start
60880.19849014
MJD End
60880.200341991855
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.0046394999999999995
Ambient temperature (°C)
12.76
Seeing (arcsec)
0.385
Observation
ID
68755
Category
science
Program ID
115.282E.001
Program Title
CIRCUMSTELLAR ENVELOPES OF NEARBY CEPHEIDS WITH GRAVITY TO REFINE THE PERIOD-LUMINOSITY RELATION IN THE JWST ERA
Program Type
Normal
PI / COI
HOCDÉ / NARDETTO / GALLENNE / KERVELLA / PIETRZYNSKI / GIEREN / MÉRAND / BRAS / BAILLEUL / LEFTLEY / AFANASIEV
Target
ID
51158
Name
X_Sgr
RA
266.88755
DEC
-27.83085
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
HIGH-COMBINED
Instrument sub-mode
SINGLE
Stations
A0 G1 J2 C1
Projected baselines
Baseline Length start Length end Angle start Angle end
A0-G1 82.5160 82.2240 137.1000 137.7000
A0-J2 111.0190 110.3100 111.9000 112.4000
A0-C1 20.6260 20.5530 137.1130 137.6810
G1-J2 50.5120 50.2010 67.9000 68.1000
G1-C1 61.8900 61.6710 317.0950 317.6620
J2-C1 92.7700 92.1390 286.5090 286.9740
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 115.282E.001
HIERARCH ESO DPR CATG SCIENCE
HIERARCH ESO DPR TYPE OBJECT,SINGLE
MJD-OBS 60880.19849014
HIERARCH ESO DPR TECH INTERFEROMETRY,DIRECT
HIERARCH ESO OBS TARG NAME V X Sgr
HIERARCH ESO INS SOBJ NAME X_Sgr
RA 266.88755
DEC -27.83085
HIERARCH ESO INS SPEC RES HIGH
HIERARCH ESO INS POLA MODE COMBINED
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 C1
EXPTIME 178.0
HIERARCH ESO DET2 SEQ1 DIT 10.0
HIERARCH ESO DET2 NDIT 16
HIERARCH ESO ISS PBL12 START 82.516
HIERARCH ESO ISS PBL12 END 82.224
HIERARCH ESO ISS PBLA12 START 137.1
HIERARCH ESO ISS PBLA12 END 137.7
HIERARCH ESO ISS PBL13 START 111.019
HIERARCH ESO ISS PBL13 END 110.31
HIERARCH ESO ISS PBLA13 START 111.9
HIERARCH ESO ISS PBLA13 END 112.4
HIERARCH ESO ISS PBL14 START 20.626
HIERARCH ESO ISS PBL14 END 20.553
HIERARCH ESO ISS PBLA14 START 137.113
HIERARCH ESO ISS PBLA14 END 137.681
HIERARCH ESO ISS PBL23 START 50.512
HIERARCH ESO ISS PBL23 END 50.201
HIERARCH ESO ISS PBLA23 START 67.9
HIERARCH ESO ISS PBLA23 END 68.1
HIERARCH ESO ISS PBL24 START 61.89
HIERARCH ESO ISS PBL24 END 61.671
HIERARCH ESO ISS PBLA24 START 317.095
HIERARCH ESO ISS PBLA24 END 317.662
HIERARCH ESO ISS PBL34 START 92.77
HIERARCH ESO ISS PBL34 END 92.139
HIERARCH ESO ISS PBLA34 START 286.509
HIERARCH ESO ISS PBLA34 END 286.974
HIERARCH ESO ISS AMBI TAU0 START 0.004225
HIERARCH ESO ISS AMBI TAU0 END 0.005054
HIERARCH ESO ISS AMBI TEMP 12.76
HIERARCH ESO ISS AMBI FWHM START 0.41
HIERARCH ESO ISS AMBI FWHM END 0.36