Exposure
ID
GRAVI.2022-11-15T08:25:45.251_1
Header ID
GRAVI.2022-11-15T08:25:45.251
Date updated
2022-11-15 08:40:30 UTC+0000
Release date
2023-11-15 08:40:29 UTC+0000
UTC Start
2022-11-15 08:25:45.251
UTC End
2022-11-15 08:31:45.251
MJD Start
59898.35121818
MJD End
59898.3553848467
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.0143155
Ambient temperature (°C)
15.18
Seeing (arcsec)
0.405
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 56.3180 56.3930 34.9000 35.0000
U1-U3 102.4060 102.4330 39.8000 39.8000
U1-U4 125.2370 124.3320 62.2220 62.0050
U2-U3 46.5550 46.4900 45.8000 45.8000
U2-U4 79.5470 78.4050 81.2100 81.0850
U3-U4 49.5610 48.5910 114.1550 114.6720
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 59898.35121818
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 56.318
HIERARCH ESO ISS PBL12 END 56.393
HIERARCH ESO ISS PBLA12 START 34.9
HIERARCH ESO ISS PBLA12 END 35.0
HIERARCH ESO ISS PBL13 START 102.406
HIERARCH ESO ISS PBL13 END 102.433
HIERARCH ESO ISS PBLA13 START 39.8
HIERARCH ESO ISS PBLA13 END 39.8
HIERARCH ESO ISS PBL14 START 125.237
HIERARCH ESO ISS PBL14 END 124.332
HIERARCH ESO ISS PBLA14 START 62.222
HIERARCH ESO ISS PBLA14 END 62.005
HIERARCH ESO ISS PBL23 START 46.555
HIERARCH ESO ISS PBL23 END 46.49
HIERARCH ESO ISS PBLA23 START 45.8
HIERARCH ESO ISS PBLA23 END 45.8
HIERARCH ESO ISS PBL24 START 79.547
HIERARCH ESO ISS PBL24 END 78.405
HIERARCH ESO ISS PBLA24 START 81.21
HIERARCH ESO ISS PBLA24 END 81.085
HIERARCH ESO ISS PBL34 START 49.561
HIERARCH ESO ISS PBL34 END 48.591
HIERARCH ESO ISS PBLA34 START 114.155
HIERARCH ESO ISS PBLA34 END 114.672
HIERARCH ESO ISS AMBI TAU0 START 0.015436
HIERARCH ESO ISS AMBI TAU0 END 0.013195
HIERARCH ESO ISS AMBI TEMP 15.18
HIERARCH ESO ISS AMBI FWHM START 0.38
HIERARCH ESO ISS AMBI FWHM END 0.43