Exposure
ID
GRAVI.2023-07-06T02:53:04.738_1
Header ID
GRAVI.2023-07-06T02:53:04.738
Date updated
2023-07-06 03:11:19 UTC+0000
Release date
2024-07-06 03:11:19 UTC+0000
UTC Start
2023-07-06 02:53:04.738
UTC End
2023-07-06 02:59:04.738
MJD Start
60131.12019373
MJD End
60131.1243603967
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.003889
Ambient temperature (°C)
13.3
Seeing (arcsec)
0.845
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 56.5580 56.5530 21.5000 22.3000
U1-U3 102.4260 102.4340 27.7000 28.5000
U1-U4 129.6500 129.8700 55.4420 56.2940
U2-U3 46.6110 46.6300 35.3000 36.1000
U2-U4 88.5610 88.8340 76.3390 77.1670
U3-U4 61.5370 61.7750 106.1510 106.8710
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 60131.12019373
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 56.558
HIERARCH ESO ISS PBL12 END 56.553
HIERARCH ESO ISS PBLA12 START 21.5
HIERARCH ESO ISS PBLA12 END 22.3
HIERARCH ESO ISS PBL13 START 102.426
HIERARCH ESO ISS PBL13 END 102.434
HIERARCH ESO ISS PBLA13 START 27.7
HIERARCH ESO ISS PBLA13 END 28.5
HIERARCH ESO ISS PBL14 START 129.65
HIERARCH ESO ISS PBL14 END 129.87
HIERARCH ESO ISS PBLA14 START 55.442
HIERARCH ESO ISS PBLA14 END 56.294
HIERARCH ESO ISS PBL23 START 46.611
HIERARCH ESO ISS PBL23 END 46.63
HIERARCH ESO ISS PBLA23 START 35.3
HIERARCH ESO ISS PBLA23 END 36.1
HIERARCH ESO ISS PBL24 START 88.561
HIERARCH ESO ISS PBL24 END 88.834
HIERARCH ESO ISS PBLA24 START 76.339
HIERARCH ESO ISS PBLA24 END 77.167
HIERARCH ESO ISS PBL34 START 61.537
HIERARCH ESO ISS PBL34 END 61.775
HIERARCH ESO ISS PBLA34 START 106.151
HIERARCH ESO ISS PBLA34 END 106.871
HIERARCH ESO ISS AMBI TAU0 START 0.003851
HIERARCH ESO ISS AMBI TAU0 END 0.003927
HIERARCH ESO ISS AMBI TEMP 13.3
HIERARCH ESO ISS AMBI FWHM START 0.88
HIERARCH ESO ISS AMBI FWHM END 0.81
HIERARCH ESO FT ROBJ NAME IRS16C
HIERARCH ESO FT ROBJ ALPHA 174540.1060
HIERARCH ESO FT ROBJ DELTA -290027.5231