Exposure
ID
GRAVI.2023-12-01T03:58:04.374_1
Header ID
GRAVI.2023-12-01T03:58:04.374
Date updated
2023-12-01 04:15:17 UTC+0000
Release date
2024-12-01 04:15:17 UTC+0000
UTC Start
2023-12-01 03:58:04.374
UTC End
2023-12-01 04:04:04.374
MJD Start
60279.1653284
MJD End
60279.169495066664
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.004509
Ambient temperature (°C)
14.0
Seeing (arcsec)
0.53
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 48.8980 49.1640 18.9000 19.8000
U1-U3 87.7820 88.4480 26.2000 27.1000
U1-U4 113.0570 114.5980 58.7810 59.2500
U2-U3 39.7690 40.1670 35.2000 36.0000
U2-U4 81.7870 82.7710 81.3280 81.4360
U3-U4 61.3460 61.6410 109.1980 109.1060
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 60279.1653284
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 48.898
HIERARCH ESO ISS PBL12 END 49.164
HIERARCH ESO ISS PBLA12 START 18.9
HIERARCH ESO ISS PBLA12 END 19.8
HIERARCH ESO ISS PBL13 START 87.782
HIERARCH ESO ISS PBL13 END 88.448
HIERARCH ESO ISS PBLA13 START 26.2
HIERARCH ESO ISS PBLA13 END 27.1
HIERARCH ESO ISS PBL14 START 113.057
HIERARCH ESO ISS PBL14 END 114.598
HIERARCH ESO ISS PBLA14 START 58.781
HIERARCH ESO ISS PBLA14 END 59.25
HIERARCH ESO ISS PBL23 START 39.769
HIERARCH ESO ISS PBL23 END 40.167
HIERARCH ESO ISS PBLA23 START 35.2
HIERARCH ESO ISS PBLA23 END 36.0
HIERARCH ESO ISS PBL24 START 81.787
HIERARCH ESO ISS PBL24 END 82.771
HIERARCH ESO ISS PBLA24 START 81.328
HIERARCH ESO ISS PBLA24 END 81.436
HIERARCH ESO ISS PBL34 START 61.346
HIERARCH ESO ISS PBL34 END 61.641
HIERARCH ESO ISS PBLA34 START 109.198
HIERARCH ESO ISS PBLA34 END 109.106
HIERARCH ESO ISS AMBI TAU0 START 0.004559
HIERARCH ESO ISS AMBI TAU0 END 0.004459
HIERARCH ESO ISS AMBI TEMP 14.0
HIERARCH ESO ISS AMBI FWHM START 0.53
HIERARCH ESO ISS AMBI FWHM END 0.53