Exposure
ID
GRAVI.2025-08-26T01:58:54.591_1
Header ID
GRAVI.2025-08-26T01:58:54.591
Date updated
2025-08-26 02:10:58 UTC+0000
Release date
2025-08-26 01:58:54 UTC+0000
UTC Start
2025-08-26 01:58:54.591
UTC End
2025-08-26 02:02:54.591
MJD Start
60913.08257628
MJD End
60913.08535405778
Exposure time (s)
240.0
Validation level
1
Tau 0: Coherence time (s)
0.0042845
Ambient temperature (°C)
12.61
Seeing (arcsec)
0.935
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 47.8030 47.7440 158.4000 158.9000
A0-J2 124.9990 124.4110 98.1000 98.5000
A0-J6 169.5480 169.4770 31.5310 31.8460
B5-J2 109.4430 109.0240 75.9000 76.2000
B5-J6 201.8760 201.8850 20.6080 20.9690
J2-J6 165.9740 165.8790 347.7990 348.3080
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 60913.08257628
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 47.803
HIERARCH ESO ISS PBL12 END 47.744
HIERARCH ESO ISS PBLA12 START 158.4
HIERARCH ESO ISS PBLA12 END 158.9
HIERARCH ESO ISS PBL13 START 124.999
HIERARCH ESO ISS PBL13 END 124.411
HIERARCH ESO ISS PBLA13 START 98.1
HIERARCH ESO ISS PBLA13 END 98.5
HIERARCH ESO ISS PBL14 START 169.548
HIERARCH ESO ISS PBL14 END 169.477
HIERARCH ESO ISS PBLA14 START 31.531
HIERARCH ESO ISS PBLA14 END 31.846
HIERARCH ESO ISS PBL23 START 109.443
HIERARCH ESO ISS PBL23 END 109.024
HIERARCH ESO ISS PBLA23 START 75.9
HIERARCH ESO ISS PBLA23 END 76.2
HIERARCH ESO ISS PBL24 START 201.876
HIERARCH ESO ISS PBL24 END 201.885
HIERARCH ESO ISS PBLA24 START 20.608
HIERARCH ESO ISS PBLA24 END 20.969
HIERARCH ESO ISS PBL34 START 165.974
HIERARCH ESO ISS PBL34 END 165.879
HIERARCH ESO ISS PBLA34 START 347.799
HIERARCH ESO ISS PBLA34 END 348.308
HIERARCH ESO ISS AMBI TAU0 START 0.004078
HIERARCH ESO ISS AMBI TAU0 END 0.004491
HIERARCH ESO ISS AMBI TEMP 12.61
HIERARCH ESO ISS AMBI FWHM START 0.99
HIERARCH ESO ISS AMBI FWHM END 0.88