Exposure
ID
GRAVI.2025-08-28T00:09:34.468_1
Header ID
GRAVI.2025-08-28T00:09:34.468
Date updated
2025-08-28 00:20:59 UTC+0000
Release date
2025-08-28 00:09:34 UTC+0000
UTC Start
2025-08-28 00:09:34.468
UTC End
2025-08-28 00:13:34.468
MJD Start
60915.00664894
MJD End
60915.00942671778
Exposure time (s)
240.0
Validation level
1
Tau 0: Coherence time (s)
0.0028165
Ambient temperature (°C)
12.8
Seeing (arcsec)
1.33
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 48.6570 48.6570 147.8000 148.2000
A0-J2 127.5730 127.9160 89.5000 89.8000
A0-J6 167.8230 167.9850 21.7710 22.2720
B5-J2 110.1010 110.4190 67.4000 67.8000
B5-J6 200.3420 200.4220 10.4430 10.9290
J2-J6 167.9110 167.8770 337.1070 337.5000
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 60915.00664894
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 48.657
HIERARCH ESO ISS PBL12 END 48.657
HIERARCH ESO ISS PBLA12 START 147.8
HIERARCH ESO ISS PBLA12 END 148.2
HIERARCH ESO ISS PBL13 START 127.573
HIERARCH ESO ISS PBL13 END 127.916
HIERARCH ESO ISS PBLA13 START 89.5
HIERARCH ESO ISS PBLA13 END 89.8
HIERARCH ESO ISS PBL14 START 167.823
HIERARCH ESO ISS PBL14 END 167.985
HIERARCH ESO ISS PBLA14 START 21.771
HIERARCH ESO ISS PBLA14 END 22.272
HIERARCH ESO ISS PBL23 START 110.101
HIERARCH ESO ISS PBL23 END 110.419
HIERARCH ESO ISS PBLA23 START 67.4
HIERARCH ESO ISS PBLA23 END 67.8
HIERARCH ESO ISS PBL24 START 200.342
HIERARCH ESO ISS PBL24 END 200.422
HIERARCH ESO ISS PBLA24 START 10.443
HIERARCH ESO ISS PBLA24 END 10.929
HIERARCH ESO ISS PBL34 START 167.911
HIERARCH ESO ISS PBL34 END 167.877
HIERARCH ESO ISS PBLA34 START 337.107
HIERARCH ESO ISS PBLA34 END 337.5
HIERARCH ESO ISS AMBI TAU0 START 0.002941
HIERARCH ESO ISS AMBI TAU0 END 0.002692
HIERARCH ESO ISS AMBI TEMP 12.8
HIERARCH ESO ISS AMBI FWHM START 1.42
HIERARCH ESO ISS AMBI FWHM END 1.24