Exposure
ID
GRAVI.2023-07-04T05:44:19.190_1
Header ID
GRAVI.2023-07-04T05:44:19.190
Date updated
2023-07-04 05:56:08 UTC+0000
Release date
2024-07-04 05:56:07 UTC+0000
UTC Start
2023-07-04 05:44:19.190
UTC End
2023-07-04 05:50:19.190
MJD Start
60129.239111
MJD End
60129.2432776667
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.0031345
Ambient temperature (°C)
12.24
Seeing (arcsec)
1.05
Observation
ID
56141
Category
science
Program ID
111.24H1.003
Program Title
THE GALACTIC CENTER WITH GRAVITY - PROBING EVENT HORIZON SCALE PHYSICS WITH STARS AND FLARES
Program Type
GTO
PI / COI
EISENHAUER/ GILLESSEN/ GENZEL/ OTT/ STRAUBMEIER/ BRANDNER/ ROUSSELET-PERRAUT/ PERRIN/ GARCIA/ ECKART/ DE ZEEUW/ WIDMANN/ PAUMARD/ HORROBIN/ VINCENT/ DRESCHER/ BOURDAROT/ CAO/ LUTZ/ STURM/ RIBEIRO
Target
ID
41588
Name
S4
RA
266.416687
DEC
-29.0073
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
LOW-SPLIT
Instrument sub-mode
DUAL
Stations
U1 U2 U3 U4
Projected baselines
Baseline Length start Length end Angle start Angle end
U1-U2 53.7390 53.4690 36.8000 37.2000
U1-U3 96.0220 95.4000 43.1000 43.5000
U1-U4 116.0680 114.6310 72.9100 73.4840
U2-U3 43.0130 42.6560 50.9000 51.3000
U2-U4 79.2810 78.2350 96.4710 97.3540
U3-U4 57.9470 57.4850 128.4540 129.6160
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 111.24H1.003
HIERARCH ESO DPR CATG SCIENCE
HIERARCH ESO DPR TYPE OBJECT,DUAL
MJD-OBS 60129.239111
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME IRS16C
HIERARCH ESO INS SOBJ NAME S4
RA 266.416687
DEC -29.0073
HIERARCH ESO INS SPEC RES LOW
HIERARCH ESO INS POLA MODE SPLIT
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 389.0
HIERARCH ESO DET2 SEQ1 DIT 30.0
HIERARCH ESO DET2 NDIT 12
HIERARCH ESO ISS PBL12 START 53.739
HIERARCH ESO ISS PBL12 END 53.469
HIERARCH ESO ISS PBLA12 START 36.8
HIERARCH ESO ISS PBLA12 END 37.2
HIERARCH ESO ISS PBL13 START 96.022
HIERARCH ESO ISS PBL13 END 95.4
HIERARCH ESO ISS PBLA13 START 43.1
HIERARCH ESO ISS PBLA13 END 43.5
HIERARCH ESO ISS PBL14 START 116.068
HIERARCH ESO ISS PBL14 END 114.631
HIERARCH ESO ISS PBLA14 START 72.91
HIERARCH ESO ISS PBLA14 END 73.484
HIERARCH ESO ISS PBL23 START 43.013
HIERARCH ESO ISS PBL23 END 42.656
HIERARCH ESO ISS PBLA23 START 50.9
HIERARCH ESO ISS PBLA23 END 51.3
HIERARCH ESO ISS PBL24 START 79.281
HIERARCH ESO ISS PBL24 END 78.235
HIERARCH ESO ISS PBLA24 START 96.471
HIERARCH ESO ISS PBLA24 END 97.354
HIERARCH ESO ISS PBL34 START 57.947
HIERARCH ESO ISS PBL34 END 57.485
HIERARCH ESO ISS PBLA34 START 128.454
HIERARCH ESO ISS PBLA34 END 129.616
HIERARCH ESO ISS AMBI TAU0 START 0.003338
HIERARCH ESO ISS AMBI TAU0 END 0.002931
HIERARCH ESO ISS AMBI TEMP 12.24
HIERARCH ESO ISS AMBI FWHM START 0.99
HIERARCH ESO ISS AMBI FWHM END 1.11
HIERARCH ESO FT ROBJ NAME IRS16C
HIERARCH ESO FT ROBJ ALPHA 174540.1060
HIERARCH ESO FT ROBJ DELTA -290027.5231