Exposure
ID
GRAVI.2025-07-24T04:55:43.573_1
Header ID
GRAVI.2025-07-24T04:55:43.573
Date updated
2025-07-24 05:05:41 UTC+0000
Release date
2026-07-24 05:05:40 UTC+0000
UTC Start
2025-07-24 04:55:43.573
UTC End
2025-07-24 04:58:23.573
MJD Start
60880.20536543
MJD End
60880.20721728186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.0061235000000000005
Ambient temperature (°C)
12.75
Seeing (arcsec)
0.375
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 81.5370 81.2430 139.0000 139.6000
A0-J2 108.6150 107.8790 113.6000 114.1000
A0-C1 20.3810 20.3080 139.0330 139.6180
G1-J2 49.4500 49.1200 68.6000 68.8000
G1-C1 61.1560 60.9350 319.0140 319.6000
J2-C1 90.6290 89.9720 288.0840 288.5670
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 60880.20536543
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 81.537
HIERARCH ESO ISS PBL12 END 81.243
HIERARCH ESO ISS PBLA12 START 139.0
HIERARCH ESO ISS PBLA12 END 139.6
HIERARCH ESO ISS PBL13 START 108.615
HIERARCH ESO ISS PBL13 END 107.879
HIERARCH ESO ISS PBLA13 START 113.6
HIERARCH ESO ISS PBLA13 END 114.1
HIERARCH ESO ISS PBL14 START 20.381
HIERARCH ESO ISS PBL14 END 20.308
HIERARCH ESO ISS PBLA14 START 139.033
HIERARCH ESO ISS PBLA14 END 139.618
HIERARCH ESO ISS PBL23 START 49.45
HIERARCH ESO ISS PBL23 END 49.12
HIERARCH ESO ISS PBLA23 START 68.6
HIERARCH ESO ISS PBLA23 END 68.8
HIERARCH ESO ISS PBL24 START 61.156
HIERARCH ESO ISS PBL24 END 60.935
HIERARCH ESO ISS PBLA24 START 319.014
HIERARCH ESO ISS PBLA24 END 319.6
HIERARCH ESO ISS PBL34 START 90.629
HIERARCH ESO ISS PBL34 END 89.972
HIERARCH ESO ISS PBLA34 START 288.084
HIERARCH ESO ISS PBLA34 END 288.567
HIERARCH ESO ISS AMBI TAU0 START 0.005781
HIERARCH ESO ISS AMBI TAU0 END 0.006466
HIERARCH ESO ISS AMBI TEMP 12.75
HIERARCH ESO ISS AMBI FWHM START 0.39
HIERARCH ESO ISS AMBI FWHM END 0.36