Exposure
ID
GRAVI.2025-02-12T02:46:13.911_1
Header ID
GRAVI.2025-02-12T02:46:13.911
Date updated
2025-02-12 03:00:36 UTC+0000
Release date
2026-02-12 03:00:36 UTC+0000
UTC Start
2025-02-12 02:46:13.911
UTC End
2025-02-12 02:52:53.911
MJD Start
60718.11543879
MJD End
60718.12006841963
Exposure time (s)
400.0
Validation level
1
Tau 0: Coherence time (s)
0.016801
Ambient temperature (°C)
12.46
Seeing (arcsec)
0.5900000000000001
Observation
ID
63962
Category
science
Program ID
112.26Z1.001
Program Title
RESOLVING THE FIRST T DWARF COMPANION AS A TIGHT BROWN DWARF BINARY
Program Type
ToO
PI / COI
XUAN/ LACOUR/ WANG/ MAWET/ RICKMAN/ BRANDNER/ ZHANG/ MÉRAND/ WINTERHALDER/ SPEZZANO/ JANSON/ HINKLEY/ KRAL/ KAMMERER/ BALMER/ BOURDAROT/ RUFFIO/ OTTEN
Target
ID
47630
Name
HD_42581_B
RA
92.643405
DEC
-21.86947
Instrument
Interferometer
VLTI
Instrument
GRAVITY
Instrument mode
MEDIUM-COMBINED
Instrument sub-mode
DUAL
Stations
U1 U2 U3 U4
Projected baselines
Baseline Length start Length end Angle start Angle end
U1-U2 56.1320 56.0180 33.1000 33.6000
U1-U3 101.1860 100.8860 39.3000 39.7000
U1-U4 125.2570 124.2960 67.1160 67.5770
U2-U3 45.7640 45.5710 46.8000 47.2000
U2-U4 84.7240 83.8890 88.8420 89.4790
U3-U4 59.3090 58.8180 119.9840 120.9080
Header: used keywords
Key Value
HIERARCH ESO OBS PROG ID 112.26Z1.001
HIERARCH ESO DPR CATG SCIENCE
HIERARCH ESO DPR TYPE OBJECT,DUAL
MJD-OBS 60718.11543879
HIERARCH ESO DPR TECH INTERFEROMETRY,DIRECT
HIERARCH ESO OBS TARG NAME HD 42581 B
HIERARCH ESO INS SOBJ NAME HD_42581_B
RA 92.643405
DEC -21.86947
HIERARCH ESO INS SPEC RES MEDIUM
HIERARCH ESO INS POLA MODE COMBINED
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 414.0
HIERARCH ESO DET2 SEQ1 DIT 100.0
HIERARCH ESO DET2 NDIT 4
HIERARCH ESO ISS PBL12 START 56.132
HIERARCH ESO ISS PBL12 END 56.018
HIERARCH ESO ISS PBLA12 START 33.1
HIERARCH ESO ISS PBLA12 END 33.6
HIERARCH ESO ISS PBL13 START 101.186
HIERARCH ESO ISS PBL13 END 100.886
HIERARCH ESO ISS PBLA13 START 39.3
HIERARCH ESO ISS PBLA13 END 39.7
HIERARCH ESO ISS PBL14 START 125.257
HIERARCH ESO ISS PBL14 END 124.296
HIERARCH ESO ISS PBLA14 START 67.116
HIERARCH ESO ISS PBLA14 END 67.577
HIERARCH ESO ISS PBL23 START 45.764
HIERARCH ESO ISS PBL23 END 45.571
HIERARCH ESO ISS PBLA23 START 46.8
HIERARCH ESO ISS PBLA23 END 47.2
HIERARCH ESO ISS PBL24 START 84.724
HIERARCH ESO ISS PBL24 END 83.889
HIERARCH ESO ISS PBLA24 START 88.842
HIERARCH ESO ISS PBLA24 END 89.479
HIERARCH ESO ISS PBL34 START 59.309
HIERARCH ESO ISS PBL34 END 58.818
HIERARCH ESO ISS PBLA34 START 119.984
HIERARCH ESO ISS PBLA34 END 120.908
HIERARCH ESO ISS AMBI TAU0 START 0.01631
HIERARCH ESO ISS AMBI TAU0 END 0.017292
HIERARCH ESO ISS AMBI TEMP 12.46
HIERARCH ESO ISS AMBI FWHM START 0.64
HIERARCH ESO ISS AMBI FWHM END 0.54
HIERARCH ESO FT ROBJ NAME HD_42581
HIERARCH ESO FT ROBJ ALPHA 061034.615
HIERARCH ESO FT ROBJ DELTA -215152.656