Exposure
ID
GRAVI.2025-08-25T23:28:30.207_1
Header ID
GRAVI.2025-08-25T23:28:30.207
Date updated
2025-08-25 23:40:55 UTC+0000
Release date
2025-08-25 23:28:30 UTC+0000
UTC Start
2025-08-25 23:28:30.207
UTC End
2025-08-25 23:31:10.207
MJD Start
60912.9781274
MJD End
60912.97997925185
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.004134
Ambient temperature (°C)
11.94
Seeing (arcsec)
0.745
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 48.3250 48.3640 144.3000 144.5000
A0-J2 120.8500 121.3960 85.2000 85.5000
A0-J6 165.8370 165.9560 15.6650 16.0550
B5-J2 104.5550 104.9810 61.9000 62.3000
B5-J6 199.6020 199.6330 4.7620 5.1130
J2-J6 167.6830 167.7340 333.1840 333.3950
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 60912.9781274
HIERARCH ESO DPR TECH INTERFEROMETRY,DIRECT
HIERARCH ESO OBS TARG NAME HD 171641
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 178.0
HIERARCH ESO DET2 SEQ1 DIT 10.0
HIERARCH ESO DET2 NDIT 16
HIERARCH ESO ISS PBL12 START 48.325
HIERARCH ESO ISS PBL12 END 48.364
HIERARCH ESO ISS PBLA12 START 144.3
HIERARCH ESO ISS PBLA12 END 144.5
HIERARCH ESO ISS PBL13 START 120.85
HIERARCH ESO ISS PBL13 END 121.396
HIERARCH ESO ISS PBLA13 START 85.2
HIERARCH ESO ISS PBLA13 END 85.5
HIERARCH ESO ISS PBL14 START 165.837
HIERARCH ESO ISS PBL14 END 165.956
HIERARCH ESO ISS PBLA14 START 15.665
HIERARCH ESO ISS PBLA14 END 16.055
HIERARCH ESO ISS PBL23 START 104.555
HIERARCH ESO ISS PBL23 END 104.981
HIERARCH ESO ISS PBLA23 START 61.9
HIERARCH ESO ISS PBLA23 END 62.3
HIERARCH ESO ISS PBL24 START 199.602
HIERARCH ESO ISS PBL24 END 199.633
HIERARCH ESO ISS PBLA24 START 4.762
HIERARCH ESO ISS PBLA24 END 5.113
HIERARCH ESO ISS PBL34 START 167.683
HIERARCH ESO ISS PBL34 END 167.734
HIERARCH ESO ISS PBLA34 START 333.184
HIERARCH ESO ISS PBLA34 END 333.395
HIERARCH ESO ISS AMBI TAU0 START 0.004134
HIERARCH ESO ISS AMBI TAU0 END 0.004134
HIERARCH ESO ISS AMBI TEMP 11.94
HIERARCH ESO ISS AMBI FWHM START 0.77
HIERARCH ESO ISS AMBI FWHM END 0.72