Exposure
ID
GRAVI.2023-12-01T03:43:52.338_1
Header ID
GRAVI.2023-12-01T03:43:52.338
Date updated
2023-12-01 04:00:20 UTC+0000
Release date
2024-12-01 04:00:20 UTC+0000
UTC Start
2023-12-01 03:43:52.338
UTC End
2023-12-01 03:49:52.338
MJD Start
60279.15546687
MJD End
60279.15963353666
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.004318499999999999
Ambient temperature (°C)
14.17
Seeing (arcsec)
0.61
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 48.3480 48.5950 16.9000 17.8000
U1-U3 86.3590 87.0060 24.2000 25.1000
U1-U4 109.4990 111.1640 57.6370 58.1830
U2-U3 38.8950 39.2970 33.3000 34.2000
U2-U4 79.4200 80.5430 81.0600 81.1890
U3-U4 60.5510 60.9420 109.4520 109.3260
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 60279.15546687
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 48.348
HIERARCH ESO ISS PBL12 END 48.595
HIERARCH ESO ISS PBLA12 START 16.9
HIERARCH ESO ISS PBLA12 END 17.8
HIERARCH ESO ISS PBL13 START 86.359
HIERARCH ESO ISS PBL13 END 87.006
HIERARCH ESO ISS PBLA13 START 24.2
HIERARCH ESO ISS PBLA13 END 25.1
HIERARCH ESO ISS PBL14 START 109.499
HIERARCH ESO ISS PBL14 END 111.164
HIERARCH ESO ISS PBLA14 START 57.637
HIERARCH ESO ISS PBLA14 END 58.183
HIERARCH ESO ISS PBL23 START 38.895
HIERARCH ESO ISS PBL23 END 39.297
HIERARCH ESO ISS PBLA23 START 33.3
HIERARCH ESO ISS PBLA23 END 34.2
HIERARCH ESO ISS PBL24 START 79.42
HIERARCH ESO ISS PBL24 END 80.543
HIERARCH ESO ISS PBLA24 START 81.06
HIERARCH ESO ISS PBLA24 END 81.189
HIERARCH ESO ISS PBL34 START 60.551
HIERARCH ESO ISS PBL34 END 60.942
HIERARCH ESO ISS PBLA34 START 109.452
HIERARCH ESO ISS PBLA34 END 109.326
HIERARCH ESO ISS AMBI TAU0 START 0.004587
HIERARCH ESO ISS AMBI TAU0 END 0.00405
HIERARCH ESO ISS AMBI TEMP 14.17
HIERARCH ESO ISS AMBI FWHM START 0.57
HIERARCH ESO ISS AMBI FWHM END 0.65