Exposure
ID
GRAVI.2023-07-06T01:31:46.523_1
Header ID
GRAVI.2023-07-06T01:31:46.523
Date updated
2023-07-06 01:45:27 UTC+0000
Release date
2024-07-06 01:45:27 UTC+0000
UTC Start
2023-07-06 01:31:46.523
UTC End
2023-07-06 01:37:46.523
MJD Start
60131.0637329
MJD End
60131.0678995667
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.002918
Ambient temperature (°C)
13.44
Seeing (arcsec)
0.98
Observation
ID
56153
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
41600
Name
S4
RA
266.41682
DEC
-29.00731
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 56.3760 56.3970 10.9000 11.8000
U1-U3 101.5620 101.6570 16.6000 17.5000
U1-U4 123.2370 123.9380 42.9710 44.1040
U2-U3 45.8070 45.8940 23.6000 24.6000
U2-U4 81.1950 82.0200 64.6130 65.6720
U3-U4 55.4880 56.1780 97.4260 98.1200
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 60131.0637329
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME IRS16C
HIERARCH ESO INS SOBJ NAME S4
RA 266.41682
DEC -29.00731
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 56.376
HIERARCH ESO ISS PBL12 END 56.397
HIERARCH ESO ISS PBLA12 START 10.9
HIERARCH ESO ISS PBLA12 END 11.8
HIERARCH ESO ISS PBL13 START 101.562
HIERARCH ESO ISS PBL13 END 101.657
HIERARCH ESO ISS PBLA13 START 16.6
HIERARCH ESO ISS PBLA13 END 17.5
HIERARCH ESO ISS PBL14 START 123.237
HIERARCH ESO ISS PBL14 END 123.938
HIERARCH ESO ISS PBLA14 START 42.971
HIERARCH ESO ISS PBLA14 END 44.104
HIERARCH ESO ISS PBL23 START 45.807
HIERARCH ESO ISS PBL23 END 45.894
HIERARCH ESO ISS PBLA23 START 23.6
HIERARCH ESO ISS PBLA23 END 24.6
HIERARCH ESO ISS PBL24 START 81.195
HIERARCH ESO ISS PBL24 END 82.02
HIERARCH ESO ISS PBLA24 START 64.613
HIERARCH ESO ISS PBLA24 END 65.672
HIERARCH ESO ISS PBL34 START 55.488
HIERARCH ESO ISS PBL34 END 56.178
HIERARCH ESO ISS PBLA34 START 97.426
HIERARCH ESO ISS PBLA34 END 98.12
HIERARCH ESO ISS AMBI TAU0 START 0.003017
HIERARCH ESO ISS AMBI TAU0 END 0.002819
HIERARCH ESO ISS AMBI TEMP 13.44
HIERARCH ESO ISS AMBI FWHM START 0.96
HIERARCH ESO ISS AMBI FWHM END 1.0
HIERARCH ESO FT ROBJ NAME IRS16C
HIERARCH ESO FT ROBJ ALPHA 174540.1060
HIERARCH ESO FT ROBJ DELTA -290027.5231