Exposure
ID
GRAVI.2025-06-20T07:51:29.911_1
Header ID
GRAVI.2025-06-20T07:51:29.911
Date updated
2025-06-20 08:00:57 UTC+0000
Release date
2026-06-20 08:00:56 UTC+0000
UTC Start
2025-06-20 07:51:29.911
UTC End
2025-06-20 07:54:09.911
MJD Start
60846.32742953
MJD End
60846.329281381855
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.0052745
Ambient temperature (°C)
12.57
Seeing (arcsec)
0.675
Observation
ID
68175
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
50678
Name
W_Sgr
RA
271.255137
DEC
-29.58012
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 54.4220 54.0100 297.9000 298.5000
K0-D0 73.8060 73.1130 271.7000 272.1000
K0-J3 56.2310 56.2260 356.3100 356.7450
G2-D0 34.6220 34.4550 227.8000 228.0000
G2-J3 54.0420 53.7140 55.4200 55.5450
D0-J3 88.4790 87.9840 52.4610 52.5790
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 60846.32742953
HIERARCH ESO DPR TECH INTERFEROMETRY,DIRECT
HIERARCH ESO OBS TARG NAME gam01 Sgr
HIERARCH ESO INS SOBJ NAME W_Sgr
RA 271.255137
DEC -29.58012
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 54.422
HIERARCH ESO ISS PBL12 END 54.01
HIERARCH ESO ISS PBLA12 START 297.9
HIERARCH ESO ISS PBLA12 END 298.5
HIERARCH ESO ISS PBL13 START 73.806
HIERARCH ESO ISS PBL13 END 73.113
HIERARCH ESO ISS PBLA13 START 271.7
HIERARCH ESO ISS PBLA13 END 272.1
HIERARCH ESO ISS PBL14 START 56.231
HIERARCH ESO ISS PBL14 END 56.226
HIERARCH ESO ISS PBLA14 START 356.31
HIERARCH ESO ISS PBLA14 END 356.745
HIERARCH ESO ISS PBL23 START 34.622
HIERARCH ESO ISS PBL23 END 34.455
HIERARCH ESO ISS PBLA23 START 227.8
HIERARCH ESO ISS PBLA23 END 228.0
HIERARCH ESO ISS PBL24 START 54.042
HIERARCH ESO ISS PBL24 END 53.714
HIERARCH ESO ISS PBLA24 START 55.42
HIERARCH ESO ISS PBLA24 END 55.545
HIERARCH ESO ISS PBL34 START 88.479
HIERARCH ESO ISS PBL34 END 87.984
HIERARCH ESO ISS PBLA34 START 52.461
HIERARCH ESO ISS PBLA34 END 52.579
HIERARCH ESO ISS AMBI TAU0 START 0.004969
HIERARCH ESO ISS AMBI TAU0 END 0.00558
HIERARCH ESO ISS AMBI TEMP 12.57
HIERARCH ESO ISS AMBI FWHM START 0.68
HIERARCH ESO ISS AMBI FWHM END 0.67