Exposure
ID
GRAVI.2025-08-14T04:11:44.332_1
Header ID
GRAVI.2025-08-14T04:11:44.332
Date updated
2025-08-14 04:21:05 UTC+0000
Release date
2026-08-14 04:21:05 UTC+0000
UTC Start
2025-08-14 04:11:44.332
UTC End
2025-08-14 04:14:24.332
MJD Start
60901.17481866
MJD End
60901.17667051186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.0103205
Ambient temperature (°C)
14.53
Seeing (arcsec)
0.855
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 96.6700 95.8400 256.9000 257.1000
K0-D0 74.6240 73.9390 271.3000 271.6000
K0-J3 56.2360 56.2320 355.7900 356.2270
B2-D0 30.6150 30.5080 39.7000 39.8000
B2-J3 119.1240 118.5310 49.0900 49.2100
D0-J3 89.0630 88.5740 52.3140 52.4390
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 60901.17481866
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 96.67
HIERARCH ESO ISS PBL12 END 95.84
HIERARCH ESO ISS PBLA12 START 256.9
HIERARCH ESO ISS PBLA12 END 257.1
HIERARCH ESO ISS PBL13 START 74.624
HIERARCH ESO ISS PBL13 END 73.939
HIERARCH ESO ISS PBLA13 START 271.3
HIERARCH ESO ISS PBLA13 END 271.6
HIERARCH ESO ISS PBL14 START 56.236
HIERARCH ESO ISS PBL14 END 56.232
HIERARCH ESO ISS PBLA14 START 355.79
HIERARCH ESO ISS PBLA14 END 356.227
HIERARCH ESO ISS PBL23 START 30.615
HIERARCH ESO ISS PBL23 END 30.508
HIERARCH ESO ISS PBLA23 START 39.7
HIERARCH ESO ISS PBLA23 END 39.8
HIERARCH ESO ISS PBL24 START 119.124
HIERARCH ESO ISS PBL24 END 118.531
HIERARCH ESO ISS PBLA24 START 49.09
HIERARCH ESO ISS PBLA24 END 49.21
HIERARCH ESO ISS PBL34 START 89.063
HIERARCH ESO ISS PBL34 END 88.574
HIERARCH ESO ISS PBLA34 START 52.314
HIERARCH ESO ISS PBLA34 END 52.439
HIERARCH ESO ISS AMBI TAU0 START 0.010604
HIERARCH ESO ISS AMBI TAU0 END 0.010037
HIERARCH ESO ISS AMBI TEMP 14.53
HIERARCH ESO ISS AMBI FWHM START 0.77
HIERARCH ESO ISS AMBI FWHM END 0.94