Exposure
ID
GRAVI.2023-06-03T08:19:57.967_1
Header ID
GRAVI.2023-06-03T08:19:57.967
Date updated
2023-06-03 08:35:43 UTC+0000
Release date
2024-06-03 08:35:43 UTC+0000
UTC Start
2023-06-03 08:19:57.967
UTC End
2023-06-03 08:25:57.967
MJD Start
60098.34719869
MJD End
60098.3513653567
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.0033605
Ambient temperature (°C)
13.09
Seeing (arcsec)
0.465
Observation
ID
55641
Category
science
Program ID
111.24H1.002
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
41204
Name
S4
RA
266.416794
DEC
-29.00721
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 52.1760 51.8280 38.7000 39.0000
U1-U3 92.4350 91.6390 44.9000 45.2000
U1-U4 107.8440 106.0430 75.8470 76.4020
U2-U3 40.9580 40.5050 52.9000 53.2000
U2-U4 73.3670 72.0940 101.2770 102.2810
U3-U4 55.4240 54.9110 134.8340 136.1700
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 111.24H1.002
HIERARCH ESO DPR CATG SCIENCE
HIERARCH ESO DPR TYPE OBJECT,DUAL
MJD-OBS 60098.34719869
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME IRS16C
HIERARCH ESO INS SOBJ NAME S4
RA 266.416794
DEC -29.00721
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 52.176
HIERARCH ESO ISS PBL12 END 51.828
HIERARCH ESO ISS PBLA12 START 38.7
HIERARCH ESO ISS PBLA12 END 39.0
HIERARCH ESO ISS PBL13 START 92.435
HIERARCH ESO ISS PBL13 END 91.639
HIERARCH ESO ISS PBLA13 START 44.9
HIERARCH ESO ISS PBLA13 END 45.2
HIERARCH ESO ISS PBL14 START 107.844
HIERARCH ESO ISS PBL14 END 106.043
HIERARCH ESO ISS PBLA14 START 75.847
HIERARCH ESO ISS PBLA14 END 76.402
HIERARCH ESO ISS PBL23 START 40.958
HIERARCH ESO ISS PBL23 END 40.505
HIERARCH ESO ISS PBLA23 START 52.9
HIERARCH ESO ISS PBLA23 END 53.2
HIERARCH ESO ISS PBL24 START 73.367
HIERARCH ESO ISS PBL24 END 72.094
HIERARCH ESO ISS PBLA24 START 101.277
HIERARCH ESO ISS PBLA24 END 102.281
HIERARCH ESO ISS PBL34 START 55.424
HIERARCH ESO ISS PBL34 END 54.911
HIERARCH ESO ISS PBLA34 START 134.834
HIERARCH ESO ISS PBLA34 END 136.17
HIERARCH ESO ISS AMBI TAU0 START 0.003584
HIERARCH ESO ISS AMBI TAU0 END 0.003137
HIERARCH ESO ISS AMBI TEMP 13.09
HIERARCH ESO ISS AMBI FWHM START 0.45
HIERARCH ESO ISS AMBI FWHM END 0.48
HIERARCH ESO FT ROBJ NAME IRS16C
HIERARCH ESO FT ROBJ ALPHA 174540.1060
HIERARCH ESO FT ROBJ DELTA -290027.5231