Exposure
ID
GRAVI.2025-11-30T07:02:41.961_1
Header ID
GRAVI.2025-11-30T07:02:41.961
Date updated
2025-11-30 07:16:02 UTC+0000
Release date
2026-11-30 07:16:02 UTC+0000
UTC Start
2025-11-30 07:02:41.961
UTC End
2025-11-30 07:08:41.961
MJD Start
61009.29354121
MJD End
61009.29770787666
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.005238
Ambient temperature (°C)
12.27
Seeing (arcsec)
0.535
Observation
ID
71915
Category
science
Program ID
114.27PY.001
Program Title
IS THE STELLAR QUADRUPLE HD 74438 A CANDIDATE PROGENITOR OF SN IA?
Program Type
Normal
PI / COI
MERLE / JORISSEN / LIBERT / MÉRAND / PALADINI / VAN ECK
Target
ID
53391
Name
HD_74438
RA
130.442074
DEC
-53.0624
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
MEDIUM-COMBINED
Instrument sub-mode
SINGLE
Stations
A0 B5 J2 J6
Projected baselines
Baseline Length start Length end Angle start Angle end
A0-B5 40.0850 40.4070 134.4000 135.2000
A0-J2 123.8070 124.3750 71.2000 72.6000
A0-J6 159.7970 159.5570 14.1840 15.1230
B5-J2 111.5870 111.7030 52.5000 53.9000
B5-J6 183.2690 183.1780 3.2900 4.1210
J2-J6 139.0950 139.9560 325.8560 326.5970
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 114.27PY.001
HIERARCH ESO DPR CATG SCIENCE
HIERARCH ESO DPR TYPE OBJECT,SINGLE
MJD-OBS 61009.29354121
HIERARCH ESO DPR TECH INTERFEROMETRY,DIRECT
HIERARCH ESO OBS TARG NAME HD 74438
HIERARCH ESO INS SOBJ NAME HD_74438
RA 130.442074
DEC -53.0624
HIERARCH ESO INS SPEC RES MEDIUM
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 379.0
HIERARCH ESO DET2 SEQ1 DIT 10.0
HIERARCH ESO DET2 NDIT 36
HIERARCH ESO ISS PBL12 START 40.085
HIERARCH ESO ISS PBL12 END 40.407
HIERARCH ESO ISS PBLA12 START 134.4
HIERARCH ESO ISS PBLA12 END 135.2
HIERARCH ESO ISS PBL13 START 123.807
HIERARCH ESO ISS PBL13 END 124.375
HIERARCH ESO ISS PBLA13 START 71.2
HIERARCH ESO ISS PBLA13 END 72.6
HIERARCH ESO ISS PBL14 START 159.797
HIERARCH ESO ISS PBL14 END 159.557
HIERARCH ESO ISS PBLA14 START 14.184
HIERARCH ESO ISS PBLA14 END 15.123
HIERARCH ESO ISS PBL23 START 111.587
HIERARCH ESO ISS PBL23 END 111.703
HIERARCH ESO ISS PBLA23 START 52.5
HIERARCH ESO ISS PBLA23 END 53.9
HIERARCH ESO ISS PBL24 START 183.269
HIERARCH ESO ISS PBL24 END 183.178
HIERARCH ESO ISS PBLA24 START 3.29
HIERARCH ESO ISS PBLA24 END 4.121
HIERARCH ESO ISS PBL34 START 139.095
HIERARCH ESO ISS PBL34 END 139.956
HIERARCH ESO ISS PBLA34 START 325.856
HIERARCH ESO ISS PBLA34 END 326.597
HIERARCH ESO ISS AMBI TAU0 START 0.005887
HIERARCH ESO ISS AMBI TAU0 END 0.004589
HIERARCH ESO ISS AMBI TEMP 12.27
HIERARCH ESO ISS AMBI FWHM START 0.52
HIERARCH ESO ISS AMBI FWHM END 0.55