Exposure
ID
GRAVI.2025-08-28T00:00:07.444_1
Header ID
GRAVI.2025-08-28T00:00:07.444
Date updated
2025-08-28 00:10:57 UTC+0000
Release date
2025-08-28 00:00:07 UTC+0000
UTC Start
2025-08-28 00:00:07.444
UTC End
2025-08-28 00:04:07.444
MJD Start
60915.00008616
MJD End
60915.00286393778
Exposure time (s)
240.0
Validation level
1
Tau 0: Coherence time (s)
0.0026674999999999997
Ambient temperature (°C)
12.68
Seeing (arcsec)
1.295
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 48.6420 48.6520 147.0000 147.4000
A0-J2 126.6730 127.1040 88.7000 89.0000
A0-J6 167.4530 167.6220 20.6590 21.1660
B5-J2 109.2980 109.6780 66.4000 66.9000
B5-J6 200.1700 200.2470 9.3760 9.8610
J2-J6 167.9600 167.9430 336.2830 336.6520
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 60915.00008616
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 48.642
HIERARCH ESO ISS PBL12 END 48.652
HIERARCH ESO ISS PBLA12 START 147.0
HIERARCH ESO ISS PBLA12 END 147.4
HIERARCH ESO ISS PBL13 START 126.673
HIERARCH ESO ISS PBL13 END 127.104
HIERARCH ESO ISS PBLA13 START 88.7
HIERARCH ESO ISS PBLA13 END 89.0
HIERARCH ESO ISS PBL14 START 167.453
HIERARCH ESO ISS PBL14 END 167.622
HIERARCH ESO ISS PBLA14 START 20.659
HIERARCH ESO ISS PBLA14 END 21.166
HIERARCH ESO ISS PBL23 START 109.298
HIERARCH ESO ISS PBL23 END 109.678
HIERARCH ESO ISS PBLA23 START 66.4
HIERARCH ESO ISS PBLA23 END 66.9
HIERARCH ESO ISS PBL24 START 200.17
HIERARCH ESO ISS PBL24 END 200.247
HIERARCH ESO ISS PBLA24 START 9.376
HIERARCH ESO ISS PBLA24 END 9.861
HIERARCH ESO ISS PBL34 START 167.96
HIERARCH ESO ISS PBL34 END 167.943
HIERARCH ESO ISS PBLA34 START 336.283
HIERARCH ESO ISS PBLA34 END 336.652
HIERARCH ESO ISS AMBI TAU0 START 0.003011
HIERARCH ESO ISS AMBI TAU0 END 0.002324
HIERARCH ESO ISS AMBI TEMP 12.68
HIERARCH ESO ISS AMBI FWHM START 1.27
HIERARCH ESO ISS AMBI FWHM END 1.32