Exposure
ID
GRAVI.2025-08-24T02:11:49.620_1
Header ID
GRAVI.2025-08-24T02:11:49.620
Date updated
2025-08-24 02:25:44 UTC+0000
Release date
2025-08-24 02:11:49 UTC+0000
UTC Start
2025-08-24 02:11:49.620
UTC End
2025-08-24 02:15:49.620
MJD Start
60911.09154653
MJD End
60911.09432430778
Exposure time (s)
240.0
Validation level
1
Tau 0: Coherence time (s)
0.0032199999999999998
Ambient temperature (°C)
5.71
Seeing (arcsec)
0.725
Observation
ID
70074
Category
calibrator
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
51989
Name
HD170887
RA
278.118737
DEC
-19.45211
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 47.7330 47.6730 159.0000 159.6000
A0-J2 124.2960 123.6610 98.6000 99.0000
A0-J6 169.4610 169.3710 31.9060 32.2130
B5-J2 108.9410 108.4810 76.2000 76.5000
B5-J6 201.8860 201.8860 21.0380 21.3940
J2-J6 165.8620 165.7690 348.4060 348.9220
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 115.282E.002
HIERARCH ESO DPR CATG CALIB
HIERARCH ESO DPR TYPE STD,SINGLE
MJD-OBS 60911.09154653
HIERARCH ESO DPR TECH INTERFEROMETRY,DIRECT
HIERARCH ESO OBS TARG NAME HD 170887
HIERARCH ESO INS SOBJ NAME HD170887
RA 278.118737
DEC -19.45211
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 256.0
HIERARCH ESO DET2 SEQ1 DIT 30.0
HIERARCH ESO DET2 NDIT 8
HIERARCH ESO ISS PBL12 START 47.733
HIERARCH ESO ISS PBL12 END 47.673
HIERARCH ESO ISS PBLA12 START 159.0
HIERARCH ESO ISS PBLA12 END 159.6
HIERARCH ESO ISS PBL13 START 124.296
HIERARCH ESO ISS PBL13 END 123.661
HIERARCH ESO ISS PBLA13 START 98.6
HIERARCH ESO ISS PBLA13 END 99.0
HIERARCH ESO ISS PBL14 START 169.461
HIERARCH ESO ISS PBL14 END 169.371
HIERARCH ESO ISS PBLA14 START 31.906
HIERARCH ESO ISS PBLA14 END 32.213
HIERARCH ESO ISS PBL23 START 108.941
HIERARCH ESO ISS PBL23 END 108.481
HIERARCH ESO ISS PBLA23 START 76.2
HIERARCH ESO ISS PBLA23 END 76.5
HIERARCH ESO ISS PBL24 START 201.886
HIERARCH ESO ISS PBL24 END 201.886
HIERARCH ESO ISS PBLA24 START 21.038
HIERARCH ESO ISS PBLA24 END 21.394
HIERARCH ESO ISS PBL34 START 165.862
HIERARCH ESO ISS PBL34 END 165.769
HIERARCH ESO ISS PBLA34 START 348.406
HIERARCH ESO ISS PBLA34 END 348.922
HIERARCH ESO ISS AMBI TAU0 START 0.003386
HIERARCH ESO ISS AMBI TAU0 END 0.003054
HIERARCH ESO ISS AMBI TEMP 5.71
HIERARCH ESO ISS AMBI FWHM START 0.72
HIERARCH ESO ISS AMBI FWHM END 0.73