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There are many occasions when one does not have complete information in order to classify objects into different classes, and yet it is important to do the best one can since other decisions depend on that. In astronomy, especially…

Instrumentation and Methods for Astrophysics · Physics 2012-11-16 N. S. Philip , A. Mahabal , S. Abraham. R. Williams , S. G. Djorgovski , A. Drake , C Donalek , M. Graham

Detecting poorly textured objects and estimating their 3D pose reliably is still a very challenging problem. We introduce a simple but powerful approach to computing descriptors for object views that efficiently capture both the object…

Computer Vision and Pattern Recognition · Computer Science 2017-11-15 Paul Wohlhart , Vincent Lepetit

In the last couple of decades, tremendous progress has been achieved in developing robotic telescopes and, as a result, sky surveys (both terrestrial and space) have become the source of a substantial amount of new observational data. These…

Solar and Stellar Astrophysics · Physics 2021-08-04 Michal Čokina , Viera Maslej-Krešňáková , Peter Butka , Štefan Parimucha

Wide field small aperture telescopes are widely used for optical transient observations. Detection and classification of astronomical targets in observed images are the most important and basic step. In this paper, we propose an…

Instrumentation and Methods for Astrophysics · Physics 2020-05-06 Peng Jia , Qiang Liu , Yongyang Sun

The paper presents the identification of the stars in the lower part of the Main Sequence among the objects of the deep survey of the equatorial region of the sky, performed by the eROSITA telescope at the SRG orbital observatory. Of the…

Solar and Stellar Astrophysics · Physics 2021-09-28 Aleksey A. Shlyapnikov

Use of the highly sensitive Hokupa'a curvature wavefront sensor has allowed for the first time direct adaptive optics (AO) guiding on brown dwarfs and VLM stars (SpT=M7-L2). An initial survey of 9 such objects discovered one 0.15" binary…

Astrophysics · Physics 2009-11-07 L. M. Close , D. Potter , W. Brandner , M. Lloyd-Hart , J. Liebert , A. Burrows , N. Siegler

We present an approach to identifying and characterizing unresolved, very low mass spectral blend binaries composed of late-M, L, and T dwarfs using machine learning methodologies. We generated and evaluated a series of hierarchical random…

We present a simple method for identifying candidate white dwarf systems with dusty exoplanetary debris based on a single temperature blackbody model fit to the infrared excess. We apply this technique to a sample of Southern Hemisphere…

Solar and Stellar Astrophysics · Physics 2017-11-08 E. Dennihy , J. C. Clemens , John H. Debes , B. H. Dunlap , D. Kilkenny , P. C. O'Brien , J. T. Fuchs

We present a new machine learning model for estimating photometric redshifts with improved accuracy for galaxies in Pan-STARRS1 data release 1. Depending on the estimation range of redshifts, this model based on neural networks can handle…

Instrumentation and Methods for Astrophysics · Physics 2021-12-09 Joongoo Lee , Min-Su Shin

Doppler Imaging produces 2D global maps of rotating objects using high-dispersion spectroscopy. When applied to brown dwarfs and extrasolar planets, this technique can constrain global atmospheric dynamics and/or magnetic effects on these…

Solar and Stellar Astrophysics · Physics 2014-07-02 Ian J. M. Crossfield

All transiting planets are at risk of contamination by blends with nearby, unresolved stars. Blends dilute the transit signal, causing the planet to appear smaller than it really is, or produce a false positive detection when the target…

Earth and Planetary Astrophysics · Physics 2015-06-05 Elisabeth R. Adams , David R. Ciardi , Andrea K. Dupree , T. Nick Gautier , Craig Kulesa , Don McCarthy

We have conducted a feasibility study to determine the effectiveness of using USNO-B1.0 data to preferentially detect objects with displaced red and blue components. A procedure was developed to search catalogue entries for such objects,…

Instrumentation and Methods for Astrophysics · Physics 2016-05-11 Joel S. Jayson

Y dwarfs represent the coldest class of brown dwarfs, with effective temperatures below 500K, and provide unique analogues to cold giant exoplanets. We present a large compilation of uniform near-infrared photometry from the Hubble Space…

We present some results of a CFHT adaptive optics search for companions to nearby dwarfs. We identify 21 new components in solar neighbourhood systems, of which 13 were found while surveying a volume-limited sample of M dwarfs within 12pc.…

We have developed a procedure for the classification of eclipsing binaries from their light-curve parameters and spectral type. The procedure was tested on more than 1000 systems with known classification, and its efficiency was estimated…

Solar and Stellar Astrophysics · Physics 2014-09-09 Ekaterina Avvakumova , Oleg Malkov

Object detection in natural scenes can be a challenging task. In many real-life situations, the visible spectrum is not suitable for traditional computer vision tasks. Moving outside the visible spectrum range, such as the thermal spectrum…

Computer Vision and Pattern Recognition · Computer Science 2021-02-08 Md Osman Gani , Somenath Kuiry , Alaka Das , Mita Nasipuri , Nibaran Das

The majority of brown dwarfs show some level of photometric or spectro-photometric variability in different wavelength ranges. This variability allow us to trace the 3D atmospheric structures of variable brown dwarfs and directly-imaged…

In this competition we employed a model fusion approach to achieve object detection results close to those of real images. Our method is based on the CO-DETR model, which was trained on two sets of data: one containing images under dark…

Computer Vision and Pattern Recognition · Computer Science 2024-05-07 Pengpeng Li , Haowei Gu , Yang Yang

We present COPAINS (Code for Orbital Parametrisation of Astrometrically Inferred New Systems), an innovative tool developed to identify previously undiscovered companions detectable via direct imaging, based on changes in stellar proper…

Solar and Stellar Astrophysics · Physics 2019-09-25 Fontanive C. , Muzic K. , Bonavita M. , Biller B