Exposure
ID
GRAVI.2025-06-20T07:44:53.894_1
Header ID
GRAVI.2025-06-20T07:44:53.894
Date updated
2025-06-20 07:55:59 UTC+0000
Release date
2026-06-20 07:55:59 UTC+0000
UTC Start
2025-06-20 07:44:53.894
UTC End
2025-06-20 07:47:33.894
MJD Start
60846.322846
MJD End
60846.32469785186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.003712
Ambient temperature (°C)
12.61
Seeing (arcsec)
0.63
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 55.3340 54.9290 296.6000 297.1000
K0-D0 75.3260 74.6540 270.9000 271.2000
K0-J3 56.2420 56.2370 355.3360 355.7700
G2-D0 34.9890 34.8270 227.6000 227.7000
G2-J3 54.7590 54.4420 55.1250 55.2590
D0-J3 89.5620 89.0840 52.1800 52.3080
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 60846.322846
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 55.334
HIERARCH ESO ISS PBL12 END 54.929
HIERARCH ESO ISS PBLA12 START 296.6
HIERARCH ESO ISS PBLA12 END 297.1
HIERARCH ESO ISS PBL13 START 75.326
HIERARCH ESO ISS PBL13 END 74.654
HIERARCH ESO ISS PBLA13 START 270.9
HIERARCH ESO ISS PBLA13 END 271.2
HIERARCH ESO ISS PBL14 START 56.242
HIERARCH ESO ISS PBL14 END 56.237
HIERARCH ESO ISS PBLA14 START 355.336
HIERARCH ESO ISS PBLA14 END 355.77
HIERARCH ESO ISS PBL23 START 34.989
HIERARCH ESO ISS PBL23 END 34.827
HIERARCH ESO ISS PBLA23 START 227.6
HIERARCH ESO ISS PBLA23 END 227.7
HIERARCH ESO ISS PBL24 START 54.759
HIERARCH ESO ISS PBL24 END 54.442
HIERARCH ESO ISS PBLA24 START 55.125
HIERARCH ESO ISS PBLA24 END 55.259
HIERARCH ESO ISS PBL34 START 89.562
HIERARCH ESO ISS PBL34 END 89.084
HIERARCH ESO ISS PBLA34 START 52.18
HIERARCH ESO ISS PBLA34 END 52.308
HIERARCH ESO ISS AMBI TAU0 START 0.003356
HIERARCH ESO ISS AMBI TAU0 END 0.004068
HIERARCH ESO ISS AMBI TEMP 12.61
HIERARCH ESO ISS AMBI FWHM START 0.7
HIERARCH ESO ISS AMBI FWHM END 0.56