Exposure
ID
GRAVI.2025-08-14T04:21:41.357_1
Header ID
GRAVI.2025-08-14T04:21:41.357
Date updated
2025-08-14 04:30:56 UTC+0000
Release date
2026-08-14 04:30:56 UTC+0000
UTC Start
2025-08-14 04:21:41.357
UTC End
2025-08-14 04:24:21.357
MJD Start
60901.18172867
MJD End
60901.18358052186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.009833
Ambient temperature (°C)
14.46
Seeing (arcsec)
0.8
Observation
ID
69990
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
51929
Name
W_Sgr
RA
271.253858
DEC
-29.58012
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
HIGH-COMBINED
Instrument sub-mode
SINGLE
Stations
K0 B2 D0 J3
Projected baselines
Baseline Length start Length end Angle start Angle end
K0-B2 93.8410 92.9690 257.7000 258.0000
K0-D0 72.2930 71.5760 272.5000 272.9000
K0-J3 56.2220 56.2190 357.2550 357.6930
B2-D0 30.2510 30.1380 40.1000 40.2000
B2-J3 117.1010 116.4760 49.4750 49.5800
D0-J3 87.3950 86.8800 52.7130 52.8230
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 60901.18172867
HIERARCH ESO DPR TECH INTERFEROMETRY,DIRECT
HIERARCH ESO OBS TARG NAME gam01 Sgr
HIERARCH ESO INS SOBJ NAME W_Sgr
RA 271.253858
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 B2
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 93.841
HIERARCH ESO ISS PBL12 END 92.969
HIERARCH ESO ISS PBLA12 START 257.7
HIERARCH ESO ISS PBLA12 END 258.0
HIERARCH ESO ISS PBL13 START 72.293
HIERARCH ESO ISS PBL13 END 71.576
HIERARCH ESO ISS PBLA13 START 272.5
HIERARCH ESO ISS PBLA13 END 272.9
HIERARCH ESO ISS PBL14 START 56.222
HIERARCH ESO ISS PBL14 END 56.219
HIERARCH ESO ISS PBLA14 START 357.255
HIERARCH ESO ISS PBLA14 END 357.693
HIERARCH ESO ISS PBL23 START 30.251
HIERARCH ESO ISS PBL23 END 30.138
HIERARCH ESO ISS PBLA23 START 40.1
HIERARCH ESO ISS PBLA23 END 40.2
HIERARCH ESO ISS PBL24 START 117.101
HIERARCH ESO ISS PBL24 END 116.476
HIERARCH ESO ISS PBLA24 START 49.475
HIERARCH ESO ISS PBLA24 END 49.58
HIERARCH ESO ISS PBL34 START 87.395
HIERARCH ESO ISS PBL34 END 86.88
HIERARCH ESO ISS PBLA34 START 52.713
HIERARCH ESO ISS PBLA34 END 52.823
HIERARCH ESO ISS AMBI TAU0 START 0.009833
HIERARCH ESO ISS AMBI TAU0 END 0.009833
HIERARCH ESO ISS AMBI TEMP 14.46
HIERARCH ESO ISS AMBI FWHM START 0.71
HIERARCH ESO ISS AMBI FWHM END 0.89