Exposure
ID
GRAVI.2022-11-15T08:06:06.201_1
Header ID
GRAVI.2022-11-15T08:06:06.201
Date updated
2022-11-15 08:20:47 UTC+0000
Release date
2023-11-15 08:20:47 UTC+0000
UTC Start
2022-11-15 08:06:06.201
UTC End
2022-11-15 08:12:06.201
MJD Start
59898.33757177
MJD End
59898.3417384367
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.017734
Ambient temperature (°C)
15.17
Seeing (arcsec)
0.375
Observation
ID
53150
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
39520
Name
Akn120
RA
79.049128
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 55.9960 56.1140 34.4000 34.6000
U1-U3 102.1210 102.2460 39.6000 39.7000
U1-U4 127.5840 126.9080 62.7640 62.6110
U2-U3 46.6410 46.6330 45.9000 45.9000
U2-U4 82.7220 81.7640 81.5390 81.4430
U3-U4 52.3980 51.5170 112.7610 113.1770
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 59898.33757177
HIERARCH ESO DPR TECH INTERFEROMETRY,DIRECT
HIERARCH ESO OBS TARG NAME Akn120
HIERARCH ESO INS SOBJ NAME Akn120
RA 79.049128
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 376.0
HIERARCH ESO DET2 SEQ1 DIT 30.0
HIERARCH ESO DET2 NDIT 12
HIERARCH ESO ISS PBL12 START 55.996
HIERARCH ESO ISS PBL12 END 56.114
HIERARCH ESO ISS PBLA12 START 34.4
HIERARCH ESO ISS PBLA12 END 34.6
HIERARCH ESO ISS PBL13 START 102.121
HIERARCH ESO ISS PBL13 END 102.246
HIERARCH ESO ISS PBLA13 START 39.6
HIERARCH ESO ISS PBLA13 END 39.7
HIERARCH ESO ISS PBL14 START 127.584
HIERARCH ESO ISS PBL14 END 126.908
HIERARCH ESO ISS PBLA14 START 62.764
HIERARCH ESO ISS PBLA14 END 62.611
HIERARCH ESO ISS PBL23 START 46.641
HIERARCH ESO ISS PBL23 END 46.633
HIERARCH ESO ISS PBLA23 START 45.9
HIERARCH ESO ISS PBLA23 END 45.9
HIERARCH ESO ISS PBL24 START 82.722
HIERARCH ESO ISS PBL24 END 81.764
HIERARCH ESO ISS PBLA24 START 81.539
HIERARCH ESO ISS PBLA24 END 81.443
HIERARCH ESO ISS PBL34 START 52.398
HIERARCH ESO ISS PBL34 END 51.517
HIERARCH ESO ISS PBLA34 START 112.761
HIERARCH ESO ISS PBLA34 END 113.177
HIERARCH ESO ISS AMBI TAU0 START 0.018985
HIERARCH ESO ISS AMBI TAU0 END 0.016483
HIERARCH ESO ISS AMBI TEMP 15.17
HIERARCH ESO ISS AMBI FWHM START 0.38
HIERARCH ESO ISS AMBI FWHM END 0.37