Exposure
ID
GRAVI.2023-07-04T04:22:57.971_1
Header ID
GRAVI.2023-07-04T04:22:57.971
Date updated
2023-07-04 04:41:05 UTC+0000
Release date
2024-07-04 04:41:05 UTC+0000
UTC Start
2023-07-04 04:22:57.971
UTC End
2023-07-04 04:28:57.971
MJD Start
60129.18261541
MJD End
60129.1867820767
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.0029335
Ambient temperature (°C)
12.04
Seeing (arcsec)
1.42
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 55.9700 55.8630 30.3000 30.9000
U1-U3 101.1980 100.9500 36.7000 37.3000
U1-U4 128.1050 127.5450 65.1120 65.7870
U2-U3 45.9970 45.8550 44.5000 45.1000
U2-U4 88.1320 87.7280 86.3580 87.1330
U3-U4 62.0250 61.8440 116.0350 116.9090
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 60129.18261541
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 55.97
HIERARCH ESO ISS PBL12 END 55.863
HIERARCH ESO ISS PBLA12 START 30.3
HIERARCH ESO ISS PBLA12 END 30.9
HIERARCH ESO ISS PBL13 START 101.198
HIERARCH ESO ISS PBL13 END 100.95
HIERARCH ESO ISS PBLA13 START 36.7
HIERARCH ESO ISS PBLA13 END 37.3
HIERARCH ESO ISS PBL14 START 128.105
HIERARCH ESO ISS PBL14 END 127.545
HIERARCH ESO ISS PBLA14 START 65.112
HIERARCH ESO ISS PBLA14 END 65.787
HIERARCH ESO ISS PBL23 START 45.997
HIERARCH ESO ISS PBL23 END 45.855
HIERARCH ESO ISS PBLA23 START 44.5
HIERARCH ESO ISS PBLA23 END 45.1
HIERARCH ESO ISS PBL24 START 88.132
HIERARCH ESO ISS PBL24 END 87.728
HIERARCH ESO ISS PBLA24 START 86.358
HIERARCH ESO ISS PBLA24 END 87.133
HIERARCH ESO ISS PBL34 START 62.025
HIERARCH ESO ISS PBL34 END 61.844
HIERARCH ESO ISS PBLA34 START 116.035
HIERARCH ESO ISS PBLA34 END 116.909
HIERARCH ESO ISS AMBI TAU0 START 0.002707
HIERARCH ESO ISS AMBI TAU0 END 0.00316
HIERARCH ESO ISS AMBI TEMP 12.04
HIERARCH ESO ISS AMBI FWHM START 1.49
HIERARCH ESO ISS AMBI FWHM END 1.35
HIERARCH ESO FT ROBJ NAME IRS16C
HIERARCH ESO FT ROBJ ALPHA 174540.1060
HIERARCH ESO FT ROBJ DELTA -290027.5231