Exposure
ID
GRAVI.2023-07-04T05:52:04.212_1
Header ID
GRAVI.2023-07-04T05:52:04.212
Date updated
2023-07-04 06:06:02 UTC+0000
Release date
2024-07-04 06:06:02 UTC+0000
UTC Start
2023-07-04 05:52:04.212
UTC End
2023-07-04 05:58:04.212
MJD Start
60129.24449319
MJD End
60129.2486598567
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.002831
Ambient temperature (°C)
12.21
Seeing (arcsec)
1.17
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 53.4150 53.1280 37.3000 37.6000
U1-U3 95.2750 94.6150 43.5000 43.9000
U1-U4 114.3420 112.8220 73.5960 74.1640
U2-U3 42.5840 42.2050 51.4000 51.8000
U2-U4 78.0260 76.9270 97.5280 98.4320
U3-U4 57.3940 56.9170 129.8460 131.0430
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 60129.24449319
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 53.415
HIERARCH ESO ISS PBL12 END 53.128
HIERARCH ESO ISS PBLA12 START 37.3
HIERARCH ESO ISS PBLA12 END 37.6
HIERARCH ESO ISS PBL13 START 95.275
HIERARCH ESO ISS PBL13 END 94.615
HIERARCH ESO ISS PBLA13 START 43.5
HIERARCH ESO ISS PBLA13 END 43.9
HIERARCH ESO ISS PBL14 START 114.342
HIERARCH ESO ISS PBL14 END 112.822
HIERARCH ESO ISS PBLA14 START 73.596
HIERARCH ESO ISS PBLA14 END 74.164
HIERARCH ESO ISS PBL23 START 42.584
HIERARCH ESO ISS PBL23 END 42.205
HIERARCH ESO ISS PBLA23 START 51.4
HIERARCH ESO ISS PBLA23 END 51.8
HIERARCH ESO ISS PBL24 START 78.026
HIERARCH ESO ISS PBL24 END 76.927
HIERARCH ESO ISS PBLA24 START 97.528
HIERARCH ESO ISS PBLA24 END 98.432
HIERARCH ESO ISS PBL34 START 57.394
HIERARCH ESO ISS PBL34 END 56.917
HIERARCH ESO ISS PBLA34 START 129.846
HIERARCH ESO ISS PBLA34 END 131.043
HIERARCH ESO ISS AMBI TAU0 START 0.002931
HIERARCH ESO ISS AMBI TAU0 END 0.002731
HIERARCH ESO ISS AMBI TEMP 12.21
HIERARCH ESO ISS AMBI FWHM START 1.11
HIERARCH ESO ISS AMBI FWHM END 1.23
HIERARCH ESO FT ROBJ NAME IRS16C
HIERARCH ESO FT ROBJ ALPHA 174540.1060
HIERARCH ESO FT ROBJ DELTA -290027.5231