Exposure
ID
GRAVI.2023-07-04T03:26:06.816_1
Header ID
GRAVI.2023-07-04T03:26:06.816
Date updated
2023-07-04 03:41:05 UTC+0000
Release date
2024-07-04 03:41:05 UTC+0000
UTC Start
2023-07-04 03:26:06.816
UTC End
2023-07-04 03:32:06.816
MJD Start
60129.14313445
MJD End
60129.1473011167
Exposure time (s)
360.0
Validation level
1
Tau 0: Coherence time (s)
0.002734
Ambient temperature (°C)
12.09
Seeing (arcsec)
1.16
Observation
ID
56139
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
41586
Name
S4
RA
266.416639
DEC
-29.00722
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 56.5040 56.4750 24.4000 25.2000
U1-U3 102.3740 102.3200 30.7000 31.5000
U1-U4 130.2000 130.2040 58.6630 59.4540
U2-U3 46.6300 46.6080 38.4000 39.2000
U2-U4 89.3370 89.4100 79.5090 80.3080
U3-U4 62.2640 62.3660 109.0000 109.7570
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 60129.14313445
HIERARCH ESO DPR TECH INTERFEROMETRY,WOLLASTON
HIERARCH ESO OBS TARG NAME IRS16C
HIERARCH ESO INS SOBJ NAME S4
RA 266.416639
DEC -29.00722
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 56.504
HIERARCH ESO ISS PBL12 END 56.475
HIERARCH ESO ISS PBLA12 START 24.4
HIERARCH ESO ISS PBLA12 END 25.2
HIERARCH ESO ISS PBL13 START 102.374
HIERARCH ESO ISS PBL13 END 102.32
HIERARCH ESO ISS PBLA13 START 30.7
HIERARCH ESO ISS PBLA13 END 31.5
HIERARCH ESO ISS PBL14 START 130.2
HIERARCH ESO ISS PBL14 END 130.204
HIERARCH ESO ISS PBLA14 START 58.663
HIERARCH ESO ISS PBLA14 END 59.454
HIERARCH ESO ISS PBL23 START 46.63
HIERARCH ESO ISS PBL23 END 46.608
HIERARCH ESO ISS PBLA23 START 38.4
HIERARCH ESO ISS PBLA23 END 39.2
HIERARCH ESO ISS PBL24 START 89.337
HIERARCH ESO ISS PBL24 END 89.41
HIERARCH ESO ISS PBLA24 START 79.509
HIERARCH ESO ISS PBLA24 END 80.308
HIERARCH ESO ISS PBL34 START 62.264
HIERARCH ESO ISS PBL34 END 62.366
HIERARCH ESO ISS PBLA34 START 109.0
HIERARCH ESO ISS PBLA34 END 109.757
HIERARCH ESO ISS AMBI TAU0 START 0.00272
HIERARCH ESO ISS AMBI TAU0 END 0.002748
HIERARCH ESO ISS AMBI TEMP 12.09
HIERARCH ESO ISS AMBI FWHM START 1.17
HIERARCH ESO ISS AMBI FWHM END 1.15
HIERARCH ESO FT ROBJ NAME IRS16C
HIERARCH ESO FT ROBJ ALPHA 174540.1060
HIERARCH ESO FT ROBJ DELTA -290027.5231