Exposure
ID
GRAVI.2025-06-22T03:44:24.938_1
Header ID
GRAVI.2025-06-22T03:44:24.938
Date updated
2025-06-22 03:55:38 UTC+0000
Release date
2026-06-22 03:55:37 UTC+0000
UTC Start
2025-06-22 03:44:24.938
UTC End
2025-06-22 03:47:04.938
MJD Start
60848.15584419
MJD End
60848.15769604185
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.0038145
Ambient temperature (°C)
12.21
Seeing (arcsec)
0.435
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 67.3470 67.4760 266.4000 266.8000
K0-D0 95.0430 95.1770 245.7000 246.1000
K0-J3 56.0620 56.1060 328.5010 328.7770
G2-D0 39.9510 39.9600 209.0000 209.4000
G2-J3 64.3740 64.4010 36.0930 36.4740
D0-J3 104.1380 104.1730 33.3920 33.7700
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 60848.15584419
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 67.347
HIERARCH ESO ISS PBL12 END 67.476
HIERARCH ESO ISS PBLA12 START 266.4
HIERARCH ESO ISS PBLA12 END 266.8
HIERARCH ESO ISS PBL13 START 95.043
HIERARCH ESO ISS PBL13 END 95.177
HIERARCH ESO ISS PBLA13 START 245.7
HIERARCH ESO ISS PBLA13 END 246.1
HIERARCH ESO ISS PBL14 START 56.062
HIERARCH ESO ISS PBL14 END 56.106
HIERARCH ESO ISS PBLA14 START 328.501
HIERARCH ESO ISS PBLA14 END 328.777
HIERARCH ESO ISS PBL23 START 39.951
HIERARCH ESO ISS PBL23 END 39.96
HIERARCH ESO ISS PBLA23 START 209.0
HIERARCH ESO ISS PBLA23 END 209.4
HIERARCH ESO ISS PBL24 START 64.374
HIERARCH ESO ISS PBL24 END 64.401
HIERARCH ESO ISS PBLA24 START 36.093
HIERARCH ESO ISS PBLA24 END 36.474
HIERARCH ESO ISS PBL34 START 104.138
HIERARCH ESO ISS PBL34 END 104.173
HIERARCH ESO ISS PBLA34 START 33.392
HIERARCH ESO ISS PBLA34 END 33.77
HIERARCH ESO ISS AMBI TAU0 START 0.003833
HIERARCH ESO ISS AMBI TAU0 END 0.003796
HIERARCH ESO ISS AMBI TEMP 12.21
HIERARCH ESO ISS AMBI FWHM START 0.43
HIERARCH ESO ISS AMBI FWHM END 0.44