Exposure
ID
GRAVI.2023-06-04T07:12:12.163_1
Header ID
GRAVI.2023-06-04T07:12:12.163
Date updated
2023-06-04 07:25:49 UTC+0000
Release date
2024-06-04 07:25:49 UTC+0000
UTC Start
2023-06-04 07:12:12.163
UTC End
2023-06-04 07:18:12.163
MJD Start
60099.30014078
MJD End
60099.3043074467
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.0110535
Ambient temperature (°C)
13.22
Seeing (arcsec)
0.46
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 54.8020 54.5980 34.7000 35.2000
U1-U3 98.4830 98.0100 41.0000 41.5000
U1-U4 121.8020 120.6960 70.1730 70.7740
U2-U3 44.4310 44.1580 48.9000 49.3000
U2-U4 83.4920 82.6750 92.5790 93.3940
U3-U4 59.8660 59.4870 123.4440 124.4750
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 60099.30014078
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 54.802
HIERARCH ESO ISS PBL12 END 54.598
HIERARCH ESO ISS PBLA12 START 34.7
HIERARCH ESO ISS PBLA12 END 35.2
HIERARCH ESO ISS PBL13 START 98.483
HIERARCH ESO ISS PBL13 END 98.01
HIERARCH ESO ISS PBLA13 START 41.0
HIERARCH ESO ISS PBLA13 END 41.5
HIERARCH ESO ISS PBL14 START 121.802
HIERARCH ESO ISS PBL14 END 120.696
HIERARCH ESO ISS PBLA14 START 70.173
HIERARCH ESO ISS PBLA14 END 70.774
HIERARCH ESO ISS PBL23 START 44.431
HIERARCH ESO ISS PBL23 END 44.158
HIERARCH ESO ISS PBLA23 START 48.9
HIERARCH ESO ISS PBLA23 END 49.3
HIERARCH ESO ISS PBL24 START 83.492
HIERARCH ESO ISS PBL24 END 82.675
HIERARCH ESO ISS PBLA24 START 92.579
HIERARCH ESO ISS PBLA24 END 93.394
HIERARCH ESO ISS PBL34 START 59.866
HIERARCH ESO ISS PBL34 END 59.487
HIERARCH ESO ISS PBLA34 START 123.444
HIERARCH ESO ISS PBLA34 END 124.475
HIERARCH ESO ISS AMBI TAU0 START 0.008876
HIERARCH ESO ISS AMBI TAU0 END 0.013231
HIERARCH ESO ISS AMBI TEMP 13.22
HIERARCH ESO ISS AMBI FWHM START 0.48
HIERARCH ESO ISS AMBI FWHM END 0.44
HIERARCH ESO FT ROBJ NAME IRS16C
HIERARCH ESO FT ROBJ ALPHA 174540.1060
HIERARCH ESO FT ROBJ DELTA -290027.5231