Exposure
ID
GRAVI.2025-08-25T23:11:48.165_1
Header ID
GRAVI.2025-08-25T23:11:48.165
Date updated
2025-08-25 23:20:48 UTC+0000
Release date
2025-08-25 23:11:48 UTC+0000
UTC Start
2025-08-25 23:11:48.165
UTC End
2025-08-25 23:14:28.165
MJD Start
60912.96652969
MJD End
60912.968381541854
Exposure time (s)
160.0
Validation level
1
Tau 0: Coherence time (s)
0.002916
Ambient temperature (°C)
12.02
Seeing (arcsec)
0.98
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 48.0540 48.1080 143.3000 143.5000
A0-J2 117.4240 118.0690 83.7000 84.0000
A0-J6 165.1900 165.3000 13.4060 13.8100
B5-J2 101.9530 102.4350 59.7000 60.1000
B5-J6 199.4630 199.4820 2.7600 3.1140
J2-J6 167.2860 167.3700 332.0510 332.2430
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 60912.96652969
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 48.054
HIERARCH ESO ISS PBL12 END 48.108
HIERARCH ESO ISS PBLA12 START 143.3
HIERARCH ESO ISS PBLA12 END 143.5
HIERARCH ESO ISS PBL13 START 117.424
HIERARCH ESO ISS PBL13 END 118.069
HIERARCH ESO ISS PBLA13 START 83.7
HIERARCH ESO ISS PBLA13 END 84.0
HIERARCH ESO ISS PBL14 START 165.19
HIERARCH ESO ISS PBL14 END 165.3
HIERARCH ESO ISS PBLA14 START 13.406
HIERARCH ESO ISS PBLA14 END 13.81
HIERARCH ESO ISS PBL23 START 101.953
HIERARCH ESO ISS PBL23 END 102.435
HIERARCH ESO ISS PBLA23 START 59.7
HIERARCH ESO ISS PBLA23 END 60.1
HIERARCH ESO ISS PBL24 START 199.463
HIERARCH ESO ISS PBL24 END 199.482
HIERARCH ESO ISS PBLA24 START 2.76
HIERARCH ESO ISS PBLA24 END 3.114
HIERARCH ESO ISS PBL34 START 167.286
HIERARCH ESO ISS PBL34 END 167.37
HIERARCH ESO ISS PBLA34 START 332.051
HIERARCH ESO ISS PBLA34 END 332.243
HIERARCH ESO ISS AMBI TAU0 START 0.003184
HIERARCH ESO ISS AMBI TAU0 END 0.002648
HIERARCH ESO ISS AMBI TEMP 12.02
HIERARCH ESO ISS AMBI FWHM START 1.04
HIERARCH ESO ISS AMBI FWHM END 0.92