Exposure
ID
GRAVI.2025-08-25T23:52:21.269_1
Header ID
GRAVI.2025-08-25T23:52:21.269
Date updated
2025-08-26 00:01:01 UTC+0000
Release date
2026-08-26 00:01:01 UTC+0000
UTC Start
2025-08-25 23:52:21.269
UTC End
2025-08-25 23:55:01.269
MJD Start
60912.99469061
MJD End
60912.99654246186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.0037535
Ambient temperature (°C)
11.9
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 48.6400 48.6480 146.7000 146.9000
A0-J2 126.1580 126.4900 88.4000 88.7000
A0-J6 166.9860 167.1130 20.1430 20.4990
B5-J2 108.7490 109.0410 66.1000 66.4000
B5-J6 199.8090 199.8640 8.8660 9.2040
J2-J6 167.9570 167.9440 335.8930 336.1410
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 60912.99469061
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 48.64
HIERARCH ESO ISS PBL12 END 48.648
HIERARCH ESO ISS PBLA12 START 146.7
HIERARCH ESO ISS PBLA12 END 146.9
HIERARCH ESO ISS PBL13 START 126.158
HIERARCH ESO ISS PBL13 END 126.49
HIERARCH ESO ISS PBLA13 START 88.4
HIERARCH ESO ISS PBLA13 END 88.7
HIERARCH ESO ISS PBL14 START 166.986
HIERARCH ESO ISS PBL14 END 167.113
HIERARCH ESO ISS PBLA14 START 20.143
HIERARCH ESO ISS PBLA14 END 20.499
HIERARCH ESO ISS PBL23 START 108.749
HIERARCH ESO ISS PBL23 END 109.041
HIERARCH ESO ISS PBLA23 START 66.1
HIERARCH ESO ISS PBLA23 END 66.4
HIERARCH ESO ISS PBL24 START 199.809
HIERARCH ESO ISS PBL24 END 199.864
HIERARCH ESO ISS PBLA24 START 8.866
HIERARCH ESO ISS PBLA24 END 9.204
HIERARCH ESO ISS PBL34 START 167.957
HIERARCH ESO ISS PBL34 END 167.944
HIERARCH ESO ISS PBLA34 START 335.893
HIERARCH ESO ISS PBLA34 END 336.141
HIERARCH ESO ISS AMBI TAU0 START 0.003419
HIERARCH ESO ISS AMBI TAU0 END 0.004088
HIERARCH ESO ISS AMBI TEMP 11.9
HIERARCH ESO ISS AMBI FWHM START 0.75
HIERARCH ESO ISS AMBI FWHM END 0.76