Exposure
ID
GRAVI.2023-07-01T06:22:45.477_1
Header ID
GRAVI.2023-07-01T06:22:45.477
Date updated
2023-07-01 06:36:04 UTC+0000
Release date
2024-07-01 06:36:04 UTC+0000
UTC Start
2023-07-01 06:22:45.477
UTC End
2023-07-01 06:28:45.477
MJD Start
60126.26580413
MJD End
60126.2699707967
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.01169
Ambient temperature (°C)
16.7
Seeing (arcsec)
0.51
Observation
ID
56090
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
41541
Name
S4
RA
266.417007
DEC
-29.00739
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 52.5400 52.2100 38.3000 38.7000
U1-U3 93.2660 92.5110 44.6000 44.9000
U1-U4 109.7370 108.0180 75.2350 75.7920
U2-U3 41.4330 41.0020 52.5000 52.8000
U2-U4 74.7130 73.4900 100.2120 101.1810
U3-U4 55.9790 55.4750 133.4120 134.7040
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 60126.26580413
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME IRS16C
HIERARCH ESO INS SOBJ NAME S4
RA 266.417007
DEC -29.00739
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 52.54
HIERARCH ESO ISS PBL12 END 52.21
HIERARCH ESO ISS PBLA12 START 38.3
HIERARCH ESO ISS PBLA12 END 38.7
HIERARCH ESO ISS PBL13 START 93.266
HIERARCH ESO ISS PBL13 END 92.511
HIERARCH ESO ISS PBLA13 START 44.6
HIERARCH ESO ISS PBLA13 END 44.9
HIERARCH ESO ISS PBL14 START 109.737
HIERARCH ESO ISS PBL14 END 108.018
HIERARCH ESO ISS PBLA14 START 75.235
HIERARCH ESO ISS PBLA14 END 75.792
HIERARCH ESO ISS PBL23 START 41.433
HIERARCH ESO ISS PBL23 END 41.002
HIERARCH ESO ISS PBLA23 START 52.5
HIERARCH ESO ISS PBLA23 END 52.8
HIERARCH ESO ISS PBL24 START 74.713
HIERARCH ESO ISS PBL24 END 73.49
HIERARCH ESO ISS PBLA24 START 100.212
HIERARCH ESO ISS PBLA24 END 101.181
HIERARCH ESO ISS PBL34 START 55.979
HIERARCH ESO ISS PBL34 END 55.475
HIERARCH ESO ISS PBLA34 START 133.412
HIERARCH ESO ISS PBLA34 END 134.704
HIERARCH ESO ISS AMBI TAU0 START 0.012
HIERARCH ESO ISS AMBI TAU0 END 0.01138
HIERARCH ESO ISS AMBI TEMP 16.7
HIERARCH ESO ISS AMBI FWHM START 0.56
HIERARCH ESO ISS AMBI FWHM END 0.46
HIERARCH ESO FT ROBJ NAME IRS16C
HIERARCH ESO FT ROBJ ALPHA 174540.1060
HIERARCH ESO FT ROBJ DELTA -290027.5231