Exposure
ID
GRAVI.2023-12-01T03:30:16.303_1
Header ID
GRAVI.2023-12-01T03:30:16.303
Date updated
2023-12-01 03:40:22 UTC+0000
Release date
2024-12-01 03:40:22 UTC+0000
UTC Start
2023-12-01 03:30:16.303
UTC End
2023-12-01 03:36:16.303
MJD Start
60279.14602203
MJD End
60279.150188696665
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.0044525
Ambient temperature (°C)
14.18
Seeing (arcsec)
0.565
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 47.8640 48.0900 14.8000 15.8000
U1-U3 85.0430 85.6660 22.1000 23.1000
U1-U4 105.8390 107.6200 56.3640 56.9970
U2-U3 38.0550 38.4560 31.3000 32.3000
U2-U4 76.8630 78.1220 80.7520 80.9060
U3-U4 59.5930 60.0750 109.7710 109.6090
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 60279.14602203
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 47.864
HIERARCH ESO ISS PBL12 END 48.09
HIERARCH ESO ISS PBLA12 START 14.8
HIERARCH ESO ISS PBLA12 END 15.8
HIERARCH ESO ISS PBL13 START 85.043
HIERARCH ESO ISS PBL13 END 85.666
HIERARCH ESO ISS PBLA13 START 22.1
HIERARCH ESO ISS PBLA13 END 23.1
HIERARCH ESO ISS PBL14 START 105.839
HIERARCH ESO ISS PBL14 END 107.62
HIERARCH ESO ISS PBLA14 START 56.364
HIERARCH ESO ISS PBLA14 END 56.997
HIERARCH ESO ISS PBL23 START 38.055
HIERARCH ESO ISS PBL23 END 38.456
HIERARCH ESO ISS PBLA23 START 31.3
HIERARCH ESO ISS PBLA23 END 32.3
HIERARCH ESO ISS PBL24 START 76.863
HIERARCH ESO ISS PBL24 END 78.122
HIERARCH ESO ISS PBLA24 START 80.752
HIERARCH ESO ISS PBLA24 END 80.906
HIERARCH ESO ISS PBL34 START 59.593
HIERARCH ESO ISS PBL34 END 60.075
HIERARCH ESO ISS PBLA34 START 109.771
HIERARCH ESO ISS PBLA34 END 109.609
HIERARCH ESO ISS AMBI TAU0 START 0.004538
HIERARCH ESO ISS AMBI TAU0 END 0.004367
HIERARCH ESO ISS AMBI TEMP 14.18
HIERARCH ESO ISS AMBI FWHM START 0.53
HIERARCH ESO ISS AMBI FWHM END 0.6