Exposure
ID
GRAVI.2023-12-01T03:37:04.320_1
Header ID
GRAVI.2023-12-01T03:37:04.320
Date updated
2023-12-01 03:50:16 UTC+0000
Release date
2024-12-01 03:50:16 UTC+0000
UTC Start
2023-12-01 03:37:04.320
UTC End
2023-12-01 03:43:04.320
MJD Start
60279.15074445
MJD End
60279.15491111667
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.0044065
Ambient temperature (°C)
14.17
Seeing (arcsec)
0.59
Observation
ID
57782
Category
science
Program ID
110.23XR.001
Program Title
PROBING A CLOSE BINARY OF SUPERMASSIVE BLACK HOLES WITH GRAVITY
Program Type
Normal
PI / COI
SHANGGUAN/ BROTHERTON/ CAO/ DAVIES/ DEXTER/ DE ZEEUW/ DU/ EISENHAUER/ HO/ LI/ LUTZ/ SANTOS/ SHIMIZU/ SONGSHENG/ STURM/ WANG
Target
ID
42810
Name
Akn120
RA
79.04926
DEC
-0.14997
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
MEDIUM-COMBINED
Instrument sub-mode
SINGLE
Stations
U1 U2 U3 U4
Projected baselines
Baseline Length start Length end Angle start Angle end
U1-U2 48.1000 48.3360 15.9000 16.8000
U1-U3 85.6910 86.3260 23.2000 24.1000
U1-U4 107.6920 109.4120 57.0220 57.6080
U2-U3 38.4730 38.8740 32.3000 33.3000
U2-U4 78.1720 79.3610 80.9120 81.0530
U3-U4 60.0940 60.5300 109.6020 109.4590
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 110.23XR.001
HIERARCH ESO DPR CATG SCIENCE
HIERARCH ESO DPR TYPE OBJECT,SINGLE
MJD-OBS 60279.15074445
HIERARCH ESO DPR TECH INTERFEROMETRY,DIRECT
HIERARCH ESO OBS TARG NAME Akn120
HIERARCH ESO INS SOBJ NAME Akn120
RA 79.04926
DEC -0.14997
HIERARCH ESO INS SPEC RES MEDIUM
HIERARCH ESO INS POLA MODE COMBINED
HIERARCH ESO ISS CONF NTEL 4
HIERARCH ESO ISS CONF STATION1 U1
HIERARCH ESO ISS CONF STATION2 U2
HIERARCH ESO ISS CONF STATION3 U3
HIERARCH ESO ISS CONF STATION4 U4
EXPTIME 388.0
HIERARCH ESO DET2 SEQ1 DIT 30.0
HIERARCH ESO DET2 NDIT 12
HIERARCH ESO ISS PBL12 START 48.1
HIERARCH ESO ISS PBL12 END 48.336
HIERARCH ESO ISS PBLA12 START 15.9
HIERARCH ESO ISS PBLA12 END 16.8
HIERARCH ESO ISS PBL13 START 85.691
HIERARCH ESO ISS PBL13 END 86.326
HIERARCH ESO ISS PBLA13 START 23.2
HIERARCH ESO ISS PBLA13 END 24.1
HIERARCH ESO ISS PBL14 START 107.692
HIERARCH ESO ISS PBL14 END 109.412
HIERARCH ESO ISS PBLA14 START 57.022
HIERARCH ESO ISS PBLA14 END 57.608
HIERARCH ESO ISS PBL23 START 38.473
HIERARCH ESO ISS PBL23 END 38.874
HIERARCH ESO ISS PBLA23 START 32.3
HIERARCH ESO ISS PBLA23 END 33.3
HIERARCH ESO ISS PBL24 START 78.172
HIERARCH ESO ISS PBL24 END 79.361
HIERARCH ESO ISS PBLA24 START 80.912
HIERARCH ESO ISS PBLA24 END 81.053
HIERARCH ESO ISS PBL34 START 60.094
HIERARCH ESO ISS PBL34 END 60.53
HIERARCH ESO ISS PBLA34 START 109.602
HIERARCH ESO ISS PBLA34 END 109.459
HIERARCH ESO ISS AMBI TAU0 START 0.004226
HIERARCH ESO ISS AMBI TAU0 END 0.004587
HIERARCH ESO ISS AMBI TEMP 14.17
HIERARCH ESO ISS AMBI FWHM START 0.61
HIERARCH ESO ISS AMBI FWHM END 0.57