Exposure
ID
GRAVI.2025-06-22T05:41:52.303_1
Header ID
GRAVI.2025-06-22T05:41:52.303
Date updated
2025-06-22 05:55:49 UTC+0000
Release date
2026-06-22 05:55:49 UTC+0000
UTC Start
2025-06-22 05:41:52.303
UTC End
2025-06-22 05:44:32.303
MJD Start
60848.23741092
MJD End
60848.23926277186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.0028510000000000002
Ambient temperature (°C)
12.1
Seeing (arcsec)
0.525
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 66.8440 66.6820 278.7000 279.0000
K0-D0 93.3720 93.1220 257.6000 258.0000
K0-J3 56.5610 56.5580 339.4120 339.7880
G2-D0 39.1870 39.1290 219.9000 220.1000
G2-J3 63.0350 62.9190 47.1260 47.3980
D0-J3 102.0280 101.8540 44.3430 44.6120
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 60848.23741092
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 66.844
HIERARCH ESO ISS PBL12 END 66.682
HIERARCH ESO ISS PBLA12 START 278.7
HIERARCH ESO ISS PBLA12 END 279.0
HIERARCH ESO ISS PBL13 START 93.372
HIERARCH ESO ISS PBL13 END 93.122
HIERARCH ESO ISS PBLA13 START 257.6
HIERARCH ESO ISS PBLA13 END 258.0
HIERARCH ESO ISS PBL14 START 56.561
HIERARCH ESO ISS PBL14 END 56.558
HIERARCH ESO ISS PBLA14 START 339.412
HIERARCH ESO ISS PBLA14 END 339.788
HIERARCH ESO ISS PBL23 START 39.187
HIERARCH ESO ISS PBL23 END 39.129
HIERARCH ESO ISS PBLA23 START 219.9
HIERARCH ESO ISS PBLA23 END 220.1
HIERARCH ESO ISS PBL24 START 63.035
HIERARCH ESO ISS PBL24 END 62.919
HIERARCH ESO ISS PBLA24 START 47.126
HIERARCH ESO ISS PBLA24 END 47.398
HIERARCH ESO ISS PBL34 START 102.028
HIERARCH ESO ISS PBL34 END 101.854
HIERARCH ESO ISS PBLA34 START 44.343
HIERARCH ESO ISS PBLA34 END 44.612
HIERARCH ESO ISS AMBI TAU0 START 0.003006
HIERARCH ESO ISS AMBI TAU0 END 0.002696
HIERARCH ESO ISS AMBI TEMP 12.1
HIERARCH ESO ISS AMBI FWHM START 0.5
HIERARCH ESO ISS AMBI FWHM END 0.55