Exposure
ID
GRAVI.2023-07-06T05:57:56.237_1
Header ID
GRAVI.2023-07-06T05:57:56.237
Date updated
2023-07-06 06:15:38 UTC+0000
Release date
2024-07-06 06:15:38 UTC+0000
UTC Start
2023-07-06 05:57:56.237
UTC End
2023-07-06 06:03:56.237
MJD Start
60131.24856756
MJD End
60131.2527342267
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.0053095
Ambient temperature (°C)
12.66
Seeing (arcsec)
0.79
Observation
ID
56157
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
41604
Name
S4
RA
266.416828
DEC
-29.00715
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 52.7910 52.4740 38.0000 38.4000
U1-U3 93.8400 93.1150 44.3000 44.6000
U1-U4 111.0480 109.3910 74.7920 75.3490
U2-U3 41.7620 41.3470 52.2000 52.6000
U2-U4 75.6510 74.4670 99.4620 100.4070
U3-U4 56.3720 55.8770 132.4140 133.6720
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 60131.24856756
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME IRS16C
HIERARCH ESO INS SOBJ NAME S4
RA 266.416828
DEC -29.00715
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 52.791
HIERARCH ESO ISS PBL12 END 52.474
HIERARCH ESO ISS PBLA12 START 38.0
HIERARCH ESO ISS PBLA12 END 38.4
HIERARCH ESO ISS PBL13 START 93.84
HIERARCH ESO ISS PBL13 END 93.115
HIERARCH ESO ISS PBLA13 START 44.3
HIERARCH ESO ISS PBLA13 END 44.6
HIERARCH ESO ISS PBL14 START 111.048
HIERARCH ESO ISS PBL14 END 109.391
HIERARCH ESO ISS PBLA14 START 74.792
HIERARCH ESO ISS PBLA14 END 75.349
HIERARCH ESO ISS PBL23 START 41.762
HIERARCH ESO ISS PBL23 END 41.347
HIERARCH ESO ISS PBLA23 START 52.2
HIERARCH ESO ISS PBLA23 END 52.6
HIERARCH ESO ISS PBL24 START 75.651
HIERARCH ESO ISS PBL24 END 74.467
HIERARCH ESO ISS PBLA24 START 99.462
HIERARCH ESO ISS PBLA24 END 100.407
HIERARCH ESO ISS PBL34 START 56.372
HIERARCH ESO ISS PBL34 END 55.877
HIERARCH ESO ISS PBLA34 START 132.414
HIERARCH ESO ISS PBLA34 END 133.672
HIERARCH ESO ISS AMBI TAU0 START 0.005015
HIERARCH ESO ISS AMBI TAU0 END 0.005604
HIERARCH ESO ISS AMBI TEMP 12.66
HIERARCH ESO ISS AMBI FWHM START 0.84
HIERARCH ESO ISS AMBI FWHM END 0.74
HIERARCH ESO FT ROBJ NAME IRS16C
HIERARCH ESO FT ROBJ ALPHA 174540.1060
HIERARCH ESO FT ROBJ DELTA -290027.5231