Exposure
ID
GRAVI.2023-12-01T03:23:28.285_1
Header ID
GRAVI.2023-12-01T03:23:28.285
Date updated
2023-12-01 03:35:34 UTC+0000
Release date
2024-12-01 03:35:34 UTC+0000
UTC Start
2023-12-01 03:23:28.285
UTC End
2023-12-01 03:29:28.285
MJD Start
60279.1412996
MJD End
60279.145466266666
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.004893
Ambient temperature (°C)
14.15
Seeing (arcsec)
0.525
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 47.6420 47.8550 13.8000 14.8000
U1-U3 84.4160 85.0180 21.1000 22.1000
U1-U4 103.9460 105.7660 55.6630 56.3380
U2-U3 37.6420 38.0380 30.3000 31.3000
U2-U4 75.4950 76.8100 80.5790 80.7450
U3-U4 59.0480 59.5720 109.9570 109.7780
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 60279.1412996
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 47.642
HIERARCH ESO ISS PBL12 END 47.855
HIERARCH ESO ISS PBLA12 START 13.8
HIERARCH ESO ISS PBLA12 END 14.8
HIERARCH ESO ISS PBL13 START 84.416
HIERARCH ESO ISS PBL13 END 85.018
HIERARCH ESO ISS PBLA13 START 21.1
HIERARCH ESO ISS PBLA13 END 22.1
HIERARCH ESO ISS PBL14 START 103.946
HIERARCH ESO ISS PBL14 END 105.766
HIERARCH ESO ISS PBLA14 START 55.663
HIERARCH ESO ISS PBLA14 END 56.338
HIERARCH ESO ISS PBL23 START 37.642
HIERARCH ESO ISS PBL23 END 38.038
HIERARCH ESO ISS PBLA23 START 30.3
HIERARCH ESO ISS PBLA23 END 31.3
HIERARCH ESO ISS PBL24 START 75.495
HIERARCH ESO ISS PBL24 END 76.81
HIERARCH ESO ISS PBLA24 START 80.579
HIERARCH ESO ISS PBLA24 END 80.745
HIERARCH ESO ISS PBL34 START 59.048
HIERARCH ESO ISS PBL34 END 59.572
HIERARCH ESO ISS PBLA34 START 109.957
HIERARCH ESO ISS PBLA34 END 109.778
HIERARCH ESO ISS AMBI TAU0 START 0.005248
HIERARCH ESO ISS AMBI TAU0 END 0.004538
HIERARCH ESO ISS AMBI TEMP 14.15
HIERARCH ESO ISS AMBI FWHM START 0.52
HIERARCH ESO ISS AMBI FWHM END 0.53