Updated astrometry and masses of the LUH 16 brown dwarf binary

@article{Lazorenko2018UpdatedAA,
  title={Updated astrometry and masses of the LUH 16 brown dwarf binary},
  author={Petro F. Lazorenko and Johannes Sahlmann},
  journal={Astronomy \& Astrophysics},
  year={2018}
}
The nearest known binary brown dwarf WISE J104915.57–531906.1AB (LUH 16) is a well-studied benchmark for our understanding of substellar objects. Previously published astrometry of LUH 16 obtained with FORS2 on the Very Large Telescope was affected by errors that limited its use in combination with other datasets, thereby hampering the determination of its accurate orbital parameters and masses. We improve upon the calibration and analysis of the FORS2 astrometry with the help of Gaia DR2 to… 
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References

SHOWING 1-10 OF 22 REFERENCES
Hubble Space Telescope astrometry of the closest brown dwarf binary system - I. Overview and improved orbit
Located at ~2pc, the L7.5+T0.5 dwarfs system WISE J104915.57-531906.1 (Luhman16AB) is the third closest system known to Earth, making it a key benchmark for detailed investigation of brown dwarf
Individual, Model-independent Masses of the Closest Known Brown Dwarf Binary to the Sun
At a distance of ∼2 pc, our nearest brown dwarf neighbor, Luhman 16 AB, has been extensively studied since its discovery 3 years ago, yet its most fundamental parameter—the masses of the individual
Mass ratio of the 2 pc binary brown dwarf LUH 16 and limits on planetary companions from astrometry
We analyse FORS2/VLT $I$-band imaging data to monitor the motions of both components in the nearest known binary brown dwarf WISE J104915.57-531906.1AB (LUH16) over one year. The astrometry is
Possible astrometric discovery of a substellar companion to the closest binary brown dwarf system WISE J104915.57–531906.1
Using FORS2 on the Very Large Telescope, we have astrometrically monitored over a period of two months the two components of the brown dwarf system WISE J104915.57-531906.1, the closest one to the
DISCOVERY OF A BINARY BROWN DWARF AT 2 pc FROM THE SUN
I am using multi-epoch astrometry from the Wide-field Infrared Survey Explorer (WISE) to search for new members of the solar neighborhood via their high proper motions. Through this work, I have
Astrometric planet search around southern ultracool dwarfs - I. First results, including parallaxes of 20 M8–L2 dwarfs
Context. Extrasolar-planet searches that target very low-mass stars and brown dwarfs are hampered by intrinsic or instrumental limitations. Time series of astrometric measurements with precisions
Gaia and VLT astrometry of faint stars: Precision of Gaia DR1 positions and updated VLT parallaxes of ultracool dwarfs
We compared positions of the Gaia first data release (DR1) secondary data set at its faint limit with CCD positions of stars in 20 fields observed with the VLT/FORS2 camera. The FORS2 position
Gaia Data Release 1 - Astrometry: one billion positions, two million proper motions and parallaxes
Gaia Data Release 1 (Gaia DR1) contains astrometric results for more than 1 billion stars brighter than magnitude 20.7 based on observations collected by the Gaia satellite during the first 14 months
Precision astrometry with adaptive optics: constraints on the mutual orbit of Luhman 16AB from GeMS
ELTs equipped with MCAO systems will be powerful astrometric tools in the next two decades. With sparse-field precisions exceeding 30 uas for V > 18, the ELTs will surpass even GAIA's per-epoch
Astrometric planet search around southern ultracool dwarfs II: Astrometric reduction methods and a deep astrometric catalogue
We describe the astrometric reduction of images obtained with the FORS2/VLT camera in the framework of an astrometric planet search around 20 M/L-transition dwarfs. We present the correction of
...
...