Exposure
ID
GRAVI.2025-07-24T04:39:07.531_1
Header ID
GRAVI.2025-07-24T04:39:07.531
Date updated
2025-07-24 04:50:49 UTC+0000
Release date
2026-07-24 04:50:49 UTC+0000
UTC Start
2025-07-24 04:39:07.531
UTC End
2025-07-24 04:41:47.531
MJD Start
60880.19383716
MJD End
60880.19568901185
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.00351
Ambient temperature (°C)
12.7
Seeing (arcsec)
0.435
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 83.1650 82.8800 135.8000 136.4000
A0-J2 112.5790 111.8970 110.8000 111.3000
A0-C1 20.7880 20.7170 135.8580 136.4080
G1-J2 51.1910 50.8950 67.5000 67.7000
G1-C1 62.3760 62.1630 315.8390 316.3900
J2-C1 94.1540 93.5490 285.4830 285.9330
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 60880.19383716
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 83.165
HIERARCH ESO ISS PBL12 END 82.88
HIERARCH ESO ISS PBLA12 START 135.8
HIERARCH ESO ISS PBLA12 END 136.4
HIERARCH ESO ISS PBL13 START 112.579
HIERARCH ESO ISS PBL13 END 111.897
HIERARCH ESO ISS PBLA13 START 110.8
HIERARCH ESO ISS PBLA13 END 111.3
HIERARCH ESO ISS PBL14 START 20.788
HIERARCH ESO ISS PBL14 END 20.717
HIERARCH ESO ISS PBLA14 START 135.858
HIERARCH ESO ISS PBLA14 END 136.408
HIERARCH ESO ISS PBL23 START 51.191
HIERARCH ESO ISS PBL23 END 50.895
HIERARCH ESO ISS PBLA23 START 67.5
HIERARCH ESO ISS PBLA23 END 67.7
HIERARCH ESO ISS PBL24 START 62.376
HIERARCH ESO ISS PBL24 END 62.163
HIERARCH ESO ISS PBLA24 START 315.839
HIERARCH ESO ISS PBLA24 END 316.39
HIERARCH ESO ISS PBL34 START 94.154
HIERARCH ESO ISS PBL34 END 93.549
HIERARCH ESO ISS PBLA34 START 285.483
HIERARCH ESO ISS PBLA34 END 285.933
HIERARCH ESO ISS AMBI TAU0 START 0.003154
HIERARCH ESO ISS AMBI TAU0 END 0.003866
HIERARCH ESO ISS AMBI TEMP 12.7
HIERARCH ESO ISS AMBI FWHM START 0.45
HIERARCH ESO ISS AMBI FWHM END 0.42