Exposure
ID
GRAVI.2025-08-24T02:02:34.596_1
Header ID
GRAVI.2025-08-24T02:02:34.596
Date updated
2025-08-24 02:16:00 UTC+0000
Release date
2025-08-24 02:02:34 UTC+0000
UTC Start
2025-08-24 02:02:34.596
UTC End
2025-08-24 02:06:34.596
MJD Start
60911.08512264
MJD End
60911.08790041778
Exposure time (s)
240.0
Validation level
1
Tau 0: Coherence time (s)
0.003686
Ambient temperature (°C)
5.7
Seeing (arcsec)
0.7050000000000001
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 47.8610 47.8030 157.9000 158.4000
A0-J2 125.5460 124.9940 97.8000 98.1000
A0-J6 169.6050 169.5480 31.2120 31.5350
B5-J2 109.8280 109.4400 75.6000 75.9000
B5-J6 201.8600 201.8760 20.2460 20.6130
J2-J6 166.0700 165.9730 347.3000 347.8050
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 60911.08512264
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 47.861
HIERARCH ESO ISS PBL12 END 47.803
HIERARCH ESO ISS PBLA12 START 157.9
HIERARCH ESO ISS PBLA12 END 158.4
HIERARCH ESO ISS PBL13 START 125.546
HIERARCH ESO ISS PBL13 END 124.994
HIERARCH ESO ISS PBLA13 START 97.8
HIERARCH ESO ISS PBLA13 END 98.1
HIERARCH ESO ISS PBL14 START 169.605
HIERARCH ESO ISS PBL14 END 169.548
HIERARCH ESO ISS PBLA14 START 31.212
HIERARCH ESO ISS PBLA14 END 31.535
HIERARCH ESO ISS PBL23 START 109.828
HIERARCH ESO ISS PBL23 END 109.44
HIERARCH ESO ISS PBLA23 START 75.6
HIERARCH ESO ISS PBLA23 END 75.9
HIERARCH ESO ISS PBL24 START 201.86
HIERARCH ESO ISS PBL24 END 201.876
HIERARCH ESO ISS PBLA24 START 20.246
HIERARCH ESO ISS PBLA24 END 20.613
HIERARCH ESO ISS PBL34 START 166.07
HIERARCH ESO ISS PBL34 END 165.973
HIERARCH ESO ISS PBLA34 START 347.3
HIERARCH ESO ISS PBLA34 END 347.805
HIERARCH ESO ISS AMBI TAU0 START 0.004064
HIERARCH ESO ISS AMBI TAU0 END 0.003308
HIERARCH ESO ISS AMBI TEMP 5.7
HIERARCH ESO ISS AMBI FWHM START 0.67
HIERARCH ESO ISS AMBI FWHM END 0.74