Exposure
ID
GRAVI.2025-06-20T03:39:45.589_1
Header ID
GRAVI.2025-06-20T03:39:45.589
Date updated
2025-06-20 03:50:46 UTC+0000
Release date
2026-06-20 03:50:46 UTC+0000
UTC Start
2025-06-20 03:39:45.589
UTC End
2025-06-20 03:42:25.589
MJD Start
60846.15261098
MJD End
60846.15446283186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.004989
Ambient temperature (°C)
13.09
Seeing (arcsec)
0.71
Observation
ID
68166
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
50671
Name
X_Sgr
RA
266.890064
DEC
-27.83085
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
HIGH-COMBINED
Instrument sub-mode
SINGLE
Stations
K0 G2 D0 J3
Projected baselines
Baseline Length start Length end Angle start Angle end
K0-G2 66.7070 66.8720 264.9000 265.3000
K0-D0 94.3670 94.5420 244.0000 244.4000
K0-J3 55.8510 55.9040 327.3830 327.6420
G2-D0 39.9010 39.9150 207.4000 207.8000
G2-J3 64.2340 64.2710 34.4510 34.8450
D0-J3 103.9510 104.0010 31.7670 32.1560
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 60846.15261098
HIERARCH ESO DPR TECH INTERFEROMETRY,DIRECT
HIERARCH ESO OBS TARG NAME V X Sgr
HIERARCH ESO INS SOBJ NAME X_Sgr
RA 266.890064
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 K0
HIERARCH ESO ISS CONF STATION2 G2
HIERARCH ESO ISS CONF STATION3 D0
HIERARCH ESO ISS CONF STATION4 J3
EXPTIME 178.0
HIERARCH ESO DET2 SEQ1 DIT 10.0
HIERARCH ESO DET2 NDIT 16
HIERARCH ESO ISS PBL12 START 66.707
HIERARCH ESO ISS PBL12 END 66.872
HIERARCH ESO ISS PBLA12 START 264.9
HIERARCH ESO ISS PBLA12 END 265.3
HIERARCH ESO ISS PBL13 START 94.367
HIERARCH ESO ISS PBL13 END 94.542
HIERARCH ESO ISS PBLA13 START 244.0
HIERARCH ESO ISS PBLA13 END 244.4
HIERARCH ESO ISS PBL14 START 55.851
HIERARCH ESO ISS PBL14 END 55.904
HIERARCH ESO ISS PBLA14 START 327.383
HIERARCH ESO ISS PBLA14 END 327.642
HIERARCH ESO ISS PBL23 START 39.901
HIERARCH ESO ISS PBL23 END 39.915
HIERARCH ESO ISS PBLA23 START 207.4
HIERARCH ESO ISS PBLA23 END 207.8
HIERARCH ESO ISS PBL24 START 64.234
HIERARCH ESO ISS PBL24 END 64.271
HIERARCH ESO ISS PBLA24 START 34.451
HIERARCH ESO ISS PBLA24 END 34.845
HIERARCH ESO ISS PBL34 START 103.951
HIERARCH ESO ISS PBL34 END 104.001
HIERARCH ESO ISS PBLA34 START 31.767
HIERARCH ESO ISS PBLA34 END 32.156
HIERARCH ESO ISS AMBI TAU0 START 0.005406
HIERARCH ESO ISS AMBI TAU0 END 0.004572
HIERARCH ESO ISS AMBI TEMP 13.09
HIERARCH ESO ISS AMBI FWHM START 0.72
HIERARCH ESO ISS AMBI FWHM END 0.7