Exposure
ID
GRAVI.2025-08-25T23:21:42.190_1
Header ID
GRAVI.2025-08-25T23:21:42.190
Date updated
2025-08-25 23:30:51 UTC+0000
Release date
2025-08-25 23:21:42 UTC+0000
UTC Start
2025-08-25 23:21:42.190
UTC End
2025-08-25 23:24:22.190
MJD Start
60912.97340498
MJD End
60912.97525683186
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.0034025
Ambient temperature (°C)
12.0
Seeing (arcsec)
0.88
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 48.2250 48.2700 143.9000 144.1000
A0-J2 119.5230 120.1100 84.6000 84.9000
A0-J6 165.5680 165.6840 14.7560 15.1520
B5-J2 103.5350 103.9870 61.0000 61.4000
B5-J6 199.5370 199.5640 3.9500 4.3040
J2-J6 167.5430 167.6080 332.7100 332.9140
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 60912.97340498
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 48.225
HIERARCH ESO ISS PBL12 END 48.27
HIERARCH ESO ISS PBLA12 START 143.9
HIERARCH ESO ISS PBLA12 END 144.1
HIERARCH ESO ISS PBL13 START 119.523
HIERARCH ESO ISS PBL13 END 120.11
HIERARCH ESO ISS PBLA13 START 84.6
HIERARCH ESO ISS PBLA13 END 84.9
HIERARCH ESO ISS PBL14 START 165.568
HIERARCH ESO ISS PBL14 END 165.684
HIERARCH ESO ISS PBLA14 START 14.756
HIERARCH ESO ISS PBLA14 END 15.152
HIERARCH ESO ISS PBL23 START 103.535
HIERARCH ESO ISS PBL23 END 103.987
HIERARCH ESO ISS PBLA23 START 61.0
HIERARCH ESO ISS PBLA23 END 61.4
HIERARCH ESO ISS PBL24 START 199.537
HIERARCH ESO ISS PBL24 END 199.564
HIERARCH ESO ISS PBLA24 START 3.95
HIERARCH ESO ISS PBLA24 END 4.304
HIERARCH ESO ISS PBL34 START 167.543
HIERARCH ESO ISS PBL34 END 167.608
HIERARCH ESO ISS PBLA34 START 332.71
HIERARCH ESO ISS PBLA34 END 332.914
HIERARCH ESO ISS AMBI TAU0 START 0.003561
HIERARCH ESO ISS AMBI TAU0 END 0.003244
HIERARCH ESO ISS AMBI TEMP 12.0
HIERARCH ESO ISS AMBI FWHM START 0.87
HIERARCH ESO ISS AMBI FWHM END 0.89