Exposure
ID
GRAVI.2025-08-28T00:14:07.480_1
Header ID
GRAVI.2025-08-28T00:14:07.480
Date updated
2025-08-28 00:26:13 UTC+0000
Release date
2025-08-28 00:14:07 UTC+0000
UTC Start
2025-08-28 00:14:07.480
UTC End
2025-08-28 00:18:07.480
MJD Start
60915.0098088
MJD End
60915.01258657778
Exposure time (s)
240.0
Validation level
1
Tau 0: Coherence time (s)
0.002981
Ambient temperature (°C)
12.68
Seeing (arcsec)
1.1349999999999998
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 48.6560 48.6520 148.2000 148.6000
A0-J2 127.9380 128.2400 89.9000 90.2000
A0-J6 167.9960 168.1540 22.3070 22.7940
B5-J2 110.4400 110.7280 67.8000 68.3000
B5-J6 200.4280 200.5090 10.9630 11.4380
J2-J6 167.8750 167.8330 337.5270 337.9190
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 60915.0098088
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 48.656
HIERARCH ESO ISS PBL12 END 48.652
HIERARCH ESO ISS PBLA12 START 148.2
HIERARCH ESO ISS PBLA12 END 148.6
HIERARCH ESO ISS PBL13 START 127.938
HIERARCH ESO ISS PBL13 END 128.24
HIERARCH ESO ISS PBLA13 START 89.9
HIERARCH ESO ISS PBLA13 END 90.2
HIERARCH ESO ISS PBL14 START 167.996
HIERARCH ESO ISS PBL14 END 168.154
HIERARCH ESO ISS PBLA14 START 22.307
HIERARCH ESO ISS PBLA14 END 22.794
HIERARCH ESO ISS PBL23 START 110.44
HIERARCH ESO ISS PBL23 END 110.728
HIERARCH ESO ISS PBLA23 START 67.8
HIERARCH ESO ISS PBLA23 END 68.3
HIERARCH ESO ISS PBL24 START 200.428
HIERARCH ESO ISS PBL24 END 200.509
HIERARCH ESO ISS PBLA24 START 10.963
HIERARCH ESO ISS PBLA24 END 11.438
HIERARCH ESO ISS PBL34 START 167.875
HIERARCH ESO ISS PBL34 END 167.833
HIERARCH ESO ISS PBLA34 START 337.527
HIERARCH ESO ISS PBLA34 END 337.919
HIERARCH ESO ISS AMBI TAU0 START 0.002692
HIERARCH ESO ISS AMBI TAU0 END 0.00327
HIERARCH ESO ISS AMBI TEMP 12.68
HIERARCH ESO ISS AMBI FWHM START 1.14
HIERARCH ESO ISS AMBI FWHM END 1.13