Exposure
ID
GRAVI.2025-08-25T23:42:24.243_1
Header ID
GRAVI.2025-08-25T23:42:24.243
Date updated
2025-08-25 23:50:53 UTC+0000
Release date
2026-08-25 23:50:53 UTC+0000
UTC Start
2025-08-25 23:42:24.243
UTC End
2025-08-25 23:45:04.243
MJD Start
60912.98778059
MJD End
60912.98963244186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.003843
Ambient temperature (°C)
11.91
Seeing (arcsec)
0.76
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 48.5980 48.6130 146.0000 146.2000
A0-J2 124.9010 125.2970 87.6000 87.9000
A0-J6 166.5560 166.6850 18.9230 19.2900
B5-J2 107.6740 108.0090 65.0000 65.3000
B5-J6 199.6350 199.6850 7.7190 8.0620
J2-J6 167.9690 167.9700 335.0810 335.3180
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 60912.98778059
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 48.598
HIERARCH ESO ISS PBL12 END 48.613
HIERARCH ESO ISS PBLA12 START 146.0
HIERARCH ESO ISS PBLA12 END 146.2
HIERARCH ESO ISS PBL13 START 124.901
HIERARCH ESO ISS PBL13 END 125.297
HIERARCH ESO ISS PBLA13 START 87.6
HIERARCH ESO ISS PBLA13 END 87.9
HIERARCH ESO ISS PBL14 START 166.556
HIERARCH ESO ISS PBL14 END 166.685
HIERARCH ESO ISS PBLA14 START 18.923
HIERARCH ESO ISS PBLA14 END 19.29
HIERARCH ESO ISS PBL23 START 107.674
HIERARCH ESO ISS PBL23 END 108.009
HIERARCH ESO ISS PBLA23 START 65.0
HIERARCH ESO ISS PBLA23 END 65.3
HIERARCH ESO ISS PBL24 START 199.635
HIERARCH ESO ISS PBL24 END 199.685
HIERARCH ESO ISS PBLA24 START 7.719
HIERARCH ESO ISS PBLA24 END 8.062
HIERARCH ESO ISS PBL34 START 167.969
HIERARCH ESO ISS PBL34 END 167.97
HIERARCH ESO ISS PBLA34 START 335.081
HIERARCH ESO ISS PBLA34 END 335.318
HIERARCH ESO ISS AMBI TAU0 START 0.003843
HIERARCH ESO ISS AMBI TAU0 END 0.003843
HIERARCH ESO ISS AMBI TEMP 11.91
HIERARCH ESO ISS AMBI FWHM START 0.82
HIERARCH ESO ISS AMBI FWHM END 0.7