Exposure
ID
GRAVI.2025-06-20T07:34:56.870_1
Header ID
GRAVI.2025-06-20T07:34:56.870
Date updated
2025-06-20 07:45:50 UTC+0000
Release date
2026-06-20 07:45:50 UTC+0000
UTC Start
2025-06-20 07:34:56.870
UTC End
2025-06-20 07:37:36.870
MJD Start
60846.31593599
MJD End
60846.31778784186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.0048059999999999995
Ambient temperature (°C)
12.7
Seeing (arcsec)
0.53
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 56.6680 56.2790 294.7000 295.2000
K0-D0 77.5190 76.8830 269.6000 270.0000
K0-J3 56.2630 56.2560 353.8810 354.3100
G2-D0 35.5130 35.3620 227.1000 227.3000
G2-J3 55.7860 55.4890 54.6440 54.7910
D0-J3 91.1130 90.6640 51.7210 51.8610
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 60846.31593599
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 56.668
HIERARCH ESO ISS PBL12 END 56.279
HIERARCH ESO ISS PBLA12 START 294.7
HIERARCH ESO ISS PBLA12 END 295.2
HIERARCH ESO ISS PBL13 START 77.519
HIERARCH ESO ISS PBL13 END 76.883
HIERARCH ESO ISS PBLA13 START 269.6
HIERARCH ESO ISS PBLA13 END 270.0
HIERARCH ESO ISS PBL14 START 56.263
HIERARCH ESO ISS PBL14 END 56.256
HIERARCH ESO ISS PBLA14 START 353.881
HIERARCH ESO ISS PBLA14 END 354.31
HIERARCH ESO ISS PBL23 START 35.513
HIERARCH ESO ISS PBL23 END 35.362
HIERARCH ESO ISS PBLA23 START 227.1
HIERARCH ESO ISS PBLA23 END 227.3
HIERARCH ESO ISS PBL24 START 55.786
HIERARCH ESO ISS PBL24 END 55.489
HIERARCH ESO ISS PBLA24 START 54.644
HIERARCH ESO ISS PBLA24 END 54.791
HIERARCH ESO ISS PBL34 START 91.113
HIERARCH ESO ISS PBL34 END 90.664
HIERARCH ESO ISS PBLA34 START 51.721
HIERARCH ESO ISS PBLA34 END 51.861
HIERARCH ESO ISS AMBI TAU0 START 0.004911
HIERARCH ESO ISS AMBI TAU0 END 0.004701
HIERARCH ESO ISS AMBI TEMP 12.7
HIERARCH ESO ISS AMBI FWHM START 0.54
HIERARCH ESO ISS AMBI FWHM END 0.52