Exposure
ID
GRAVI.2025-08-25T23:45:39.251_1
Header ID
GRAVI.2025-08-25T23:45:39.251
Date updated
2025-08-25 23:55:45 UTC+0000
Release date
2026-08-25 23:55:44 UTC+0000
UTC Start
2025-08-25 23:45:39.251
UTC End
2025-08-25 23:48:19.251
MJD Start
60912.99003763
MJD End
60912.991889481855
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.004427
Ambient temperature (°C)
11.88
Seeing (arcsec)
0.755
Observation
ID
70077
Category
science
Program ID
115.282E.002
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
51990
Name
Y_Sgr
RA
275.344582
DEC
-18.86004
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
HIGH-COMBINED
Instrument sub-mode
SINGLE
Stations
A0 B5 J2 J6
Projected baselines
Baseline Length start Length end Angle start Angle end
A0-B5 48.6150 48.6270 146.2000 146.4000
A0-J2 125.3320 125.7070 87.9000 88.1000
A0-J6 166.6960 166.8240 19.3230 19.6860
B5-J2 108.0380 108.3590 65.4000 65.7000
B5-J6 199.6890 199.7410 8.0930 8.4340
J2-J6 167.9700 167.9670 335.3400 335.5810
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 115.282E.002
HIERARCH ESO DPR CATG SCIENCE
HIERARCH ESO DPR TYPE OBJECT,SINGLE
MJD-OBS 60912.99003763
HIERARCH ESO DPR TECH INTERFEROMETRY,DIRECT
HIERARCH ESO OBS TARG NAME V Y Sgr
HIERARCH ESO INS SOBJ NAME Y_Sgr
RA 275.344582
DEC -18.86004
HIERARCH ESO INS SPEC RES HIGH
HIERARCH ESO INS POLA MODE COMBINED
HIERARCH ESO ISS CONF NTEL 4
HIERARCH ESO ISS CONF STATION1 A0
HIERARCH ESO ISS CONF STATION2 B5
HIERARCH ESO ISS CONF STATION3 J2
HIERARCH ESO ISS CONF STATION4 J6
EXPTIME 178.0
HIERARCH ESO DET2 SEQ1 DIT 10.0
HIERARCH ESO DET2 NDIT 16
HIERARCH ESO ISS PBL12 START 48.615
HIERARCH ESO ISS PBL12 END 48.627
HIERARCH ESO ISS PBLA12 START 146.2
HIERARCH ESO ISS PBLA12 END 146.4
HIERARCH ESO ISS PBL13 START 125.332
HIERARCH ESO ISS PBL13 END 125.707
HIERARCH ESO ISS PBLA13 START 87.9
HIERARCH ESO ISS PBLA13 END 88.1
HIERARCH ESO ISS PBL14 START 166.696
HIERARCH ESO ISS PBL14 END 166.824
HIERARCH ESO ISS PBLA14 START 19.323
HIERARCH ESO ISS PBLA14 END 19.686
HIERARCH ESO ISS PBL23 START 108.038
HIERARCH ESO ISS PBL23 END 108.359
HIERARCH ESO ISS PBLA23 START 65.4
HIERARCH ESO ISS PBLA23 END 65.7
HIERARCH ESO ISS PBL24 START 199.689
HIERARCH ESO ISS PBL24 END 199.741
HIERARCH ESO ISS PBLA24 START 8.093
HIERARCH ESO ISS PBLA24 END 8.434
HIERARCH ESO ISS PBL34 START 167.97
HIERARCH ESO ISS PBL34 END 167.967
HIERARCH ESO ISS PBLA34 START 335.34
HIERARCH ESO ISS PBLA34 END 335.581
HIERARCH ESO ISS AMBI TAU0 START 0.004427
HIERARCH ESO ISS AMBI TAU0 END 0.004427
HIERARCH ESO ISS AMBI TEMP 11.88
HIERARCH ESO ISS AMBI FWHM START 0.7
HIERARCH ESO ISS AMBI FWHM END 0.81