Exposure
ID
GRAVI.2023-06-04T07:43:51.248_1
Header ID
GRAVI.2023-06-04T07:43:51.248
Date updated
2023-06-04 08:00:35 UTC+0000
Release date
2024-06-04 08:00:35 UTC+0000
UTC Start
2023-06-04 07:43:51.248
UTC End
2023-06-04 07:49:51.248
MJD Start
60099.32212093
MJD End
60099.3262875967
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.0109995
Ambient temperature (°C)
13.56
Seeing (arcsec)
0.35
Observation
ID
55649
Category
science
Program ID
111.24H1.002
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
41212
Name
S4
RA
266.416752
DEC
-29.00711
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 53.6750 53.4020 36.9000 37.3000
U1-U3 95.8750 95.2450 43.2000 43.6000
U1-U4 115.7260 114.2720 73.0490 73.6230
U2-U3 42.9280 42.5660 51.0000 51.4000
U2-U4 79.0320 77.9750 96.6830 97.5700
U3-U4 57.8360 57.3710 128.7330 129.9020
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 111.24H1.002
HIERARCH ESO DPR CATG SCIENCE
HIERARCH ESO DPR TYPE OBJECT,DUAL
MJD-OBS 60099.32212093
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME IRS16C
HIERARCH ESO INS SOBJ NAME S4
RA 266.416752
DEC -29.00711
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 53.675
HIERARCH ESO ISS PBL12 END 53.402
HIERARCH ESO ISS PBLA12 START 36.9
HIERARCH ESO ISS PBLA12 END 37.3
HIERARCH ESO ISS PBL13 START 95.875
HIERARCH ESO ISS PBL13 END 95.245
HIERARCH ESO ISS PBLA13 START 43.2
HIERARCH ESO ISS PBLA13 END 43.6
HIERARCH ESO ISS PBL14 START 115.726
HIERARCH ESO ISS PBL14 END 114.272
HIERARCH ESO ISS PBLA14 START 73.049
HIERARCH ESO ISS PBLA14 END 73.623
HIERARCH ESO ISS PBL23 START 42.928
HIERARCH ESO ISS PBL23 END 42.566
HIERARCH ESO ISS PBLA23 START 51.0
HIERARCH ESO ISS PBLA23 END 51.4
HIERARCH ESO ISS PBL24 START 79.032
HIERARCH ESO ISS PBL24 END 77.975
HIERARCH ESO ISS PBLA24 START 96.683
HIERARCH ESO ISS PBLA24 END 97.57
HIERARCH ESO ISS PBL34 START 57.836
HIERARCH ESO ISS PBL34 END 57.371
HIERARCH ESO ISS PBLA34 START 128.733
HIERARCH ESO ISS PBLA34 END 129.902
HIERARCH ESO ISS AMBI TAU0 START 0.010896
HIERARCH ESO ISS AMBI TAU0 END 0.011103
HIERARCH ESO ISS AMBI TEMP 13.56
HIERARCH ESO ISS AMBI FWHM START 0.35
HIERARCH ESO ISS AMBI FWHM END 0.35
HIERARCH ESO FT ROBJ NAME IRS16C
HIERARCH ESO FT ROBJ ALPHA 174540.1060
HIERARCH ESO FT ROBJ DELTA -290027.5231