Exposure
ID
GRAVI.2023-12-01T03:50:40.355_1
Header ID
GRAVI.2023-12-01T03:50:40.355
Date updated
2023-12-01 04:05:13 UTC+0000
Release date
2024-12-01 04:05:13 UTC+0000
UTC Start
2023-12-01 03:50:40.355
UTC End
2023-12-01 03:56:40.355
MJD Start
60279.16018929
MJD End
60279.164355956666
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.0044825
Ambient temperature (°C)
14.05
Seeing (arcsec)
0.56
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 48.6060 48.8620 17.9000 18.8000
U1-U3 87.0330 87.6910 25.2000 26.1000
U1-U4 111.2310 112.8390 58.2050 58.7130
U2-U3 39.3130 39.7140 34.2000 35.1000
U2-U4 80.5880 81.6450 81.1940 81.3130
U3-U4 60.9570 61.3020 109.3210 109.2120
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 60279.16018929
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 48.606
HIERARCH ESO ISS PBL12 END 48.862
HIERARCH ESO ISS PBLA12 START 17.9
HIERARCH ESO ISS PBLA12 END 18.8
HIERARCH ESO ISS PBL13 START 87.033
HIERARCH ESO ISS PBL13 END 87.691
HIERARCH ESO ISS PBLA13 START 25.2
HIERARCH ESO ISS PBLA13 END 26.1
HIERARCH ESO ISS PBL14 START 111.231
HIERARCH ESO ISS PBL14 END 112.839
HIERARCH ESO ISS PBLA14 START 58.205
HIERARCH ESO ISS PBLA14 END 58.713
HIERARCH ESO ISS PBL23 START 39.313
HIERARCH ESO ISS PBL23 END 39.714
HIERARCH ESO ISS PBLA23 START 34.2
HIERARCH ESO ISS PBLA23 END 35.1
HIERARCH ESO ISS PBL24 START 80.588
HIERARCH ESO ISS PBL24 END 81.645
HIERARCH ESO ISS PBLA24 START 81.194
HIERARCH ESO ISS PBLA24 END 81.313
HIERARCH ESO ISS PBL34 START 60.957
HIERARCH ESO ISS PBL34 END 61.302
HIERARCH ESO ISS PBLA34 START 109.321
HIERARCH ESO ISS PBLA34 END 109.212
HIERARCH ESO ISS AMBI TAU0 START 0.00405
HIERARCH ESO ISS AMBI TAU0 END 0.004915
HIERARCH ESO ISS AMBI TEMP 14.05
HIERARCH ESO ISS AMBI FWHM START 0.65
HIERARCH ESO ISS AMBI FWHM END 0.47