KU
K. Ulaczyk
astro-ph.SRastro-ph.EPastro-ph.GAastro-ph.IMastro-ph.HEastro-ph.COastro-phgr-qchep-exhep-ph
On Valency
published · living versionsW_98625dp4·v1 · currentpublished
A Cold Neptune-Mass Planet OGLE-2007-BLG-368Lb: Cold Neptunes Are Common
with T. Sumi, D. P. Bennett, I. A. Bond, A. Udalski +105
1 version
Preprints & journals
398 papers in the corpus · 2007–2026The GOTO Telescope Control System2609.18443v1 · Martin J. Dyer, Vik S. Dhillon, Stuart Littlefair et al.2026 · 0 citationsProc. SPIE 14151, Observatory Operations: Strategies, Processes, and Systems XI, 141511H (19 Aug 2026)
KMT-2026-BLG-0083L: A Two-Jovian-Planet System Orbiting an M Dwarf Discovered by Microlensing2609.12451v1 · Cheongho Han, Chung-Uk Lee, Zhixing Li et al.2026 · 0 citationsarXiv
KMT-2025-BLG-0975Lb and KMT-2025-BLG-1160Lb: Two Uranus-Mass Planets Beyond the Snow Line Discovered by Microlensing2607.25259v1 · Cheongho Han, Chung-Uk Lee, Andrzej Udalski et al.2026 · 0 citationsarXiv
Four Cold Giant Planets Discovered by High-Cadence Microlensing Surveys2607.04594v1 · Cheongho Han, Chung-Uk Lee, Andrzej Udalski et al.2026 · 0 citationsarXiv
The Gravitational-wave Optical Transient Observer (GOTO) data pipeline and workflow for transient discovery2603.02330v2 · J. D. Lyman, D. O'Neill, T. Killestein et al.2026 · 2 citationsarXiv
Incorporating physical source parameters into microlensing modeling2606.20555v1 · Mateusz J. Mr'oz, Rados\law Poleski, Andrzej Udalski et al.2026 · 0 citationsarXiv
Four-Body Gravitational Microlensing Events Involving Both a Binary Lens and a Binary Source2605.17654v1 · Cheongho Han, Chung-Uk Lee, Andrzej Udalski et al.2026 · 0 citationsarXiv
Mass Production of 2023 KMTNet Microlensing Planets. III: Three Planets from the Subprime Field2605.07392v1 · Hongyu Li, Zhixing Li, Weicheng Zang et al.2026 · 0 citationsarXiv
Candidate Microlensing Brown Dwarfs in Binary Lens Systems from the 2023--2025 Observing Seasons2604.07932v1 · Cheongho Han, Andrzej Udalski, Ian A. Bond et al.2026 · 1 citationarXiv
Mass Production of 2023 KMTNet Microlensing Planets. II: Two Planets and A Brown Dwarf2603.13887v2 · Zhixing Li, Hongyu Li, Weicheng Zang et al.2026 · 1 citationarXiv
Two Low Mass-Ratio Microlensing Planets and Two Types of Central-Resonant Degeneracy2603.09045v1 · Yuchen Tang, Weicheng Zang, Yoon-Hyun Ryu et al.2026 · 0 citationsarXiv
KMT-2016-BLG-1337L: A Saturn-mass planet orbiting within a binary system of low-mass stars2602.12610v1 · Cheongho Han, Chung-Uk Lee, Ian A. Bond et al.2026 · 0 citationsarXiv
A Newly Identified Degeneracy Keeps the Planetary Interpretation Viable for OGLE-2011-BLG-09502601.13276v1 · Jiyuan Zhang, Weicheng Zang, Andrzej Udalski et al.2026 · 0 citationsarXiv
A free-floating-planet microlensing event caused by a Saturn-mass object2601.00057v1 · Subo Dong, Zexuan Wu, Yoon-Hyun Ryu et al.2025 · 6 citationsarXiv
KMT-2024-BLG-0816/OGLE-2024-BLG-0519 -- A Microlensing Event with Candidate Free-Floating Planet Lens and Blended Light2601.00325v1 · R. Poleski, Y.-H. Ryu, A. Udalski et al.2026 · 0 citationsarXiv
SN 2024cld: unveiling the complex mass-loss histories of evolved supergiant progenitors to core collapse supernovae2510.27631v2 · T. L. Killestein, M. Pursiainen, R. Kotak et al.2025 · 1 citationarXiv
Four Giant Planets from 2024 KMTNet Microlensing Campaign2512.09325v1 · Cheongho Han, Andrzej Udalski, Ian A. Bond et al.2025 · 0 citationsarXiv
Discovery and Analysis of Afterglows from Poorly Localised GRBs with the Gravitational-wave Optical Transient Observer (GOTO) All-sky Survey2509.09827v2 · Amit Kumar, B. P. Gompertz, B. Schneider et al.2025 · 2 citationsMNRAS, Volume 544, Issue 2, December 2025, Pages 1541-1587
Limits on the Ejecta Mass During the Search for Kilonovae Associated with Neutron Star-Black Hole Mergers: A case study of S230518h, GW230529, S230627c and the Low-Significance Candidate S240422ed2503.15422v1 · M. Pillas, S. Antier, K. Ackley et al.2025 · 12 citationsarXiv
Six binary brown dwarf candidates identified by microlensing2510.23933v1 · Cheongho Han, Chung-Uk Lee, Ian A. Bond et al.2025 · 0 citationsarXiv
Microlensing optical depth, event rate, and limits on compact objects in dark matter based on 20 yr of OGLE observations of the Small Magellanic Cloud2507.13794v2 · P. Mr'oz, A. Udalski, M.K. Szyma'nski et al.2025 · 13 citationsApJS 280, 49 (2025)
A Comprehensive Analysis of Three Microlensing Planet Candidates with the Planet/Binary Degeneracy2509.18345v1 · Jiyuan Zhang, Weicheng Zang, Yoon-Hyun Ryu et al.2025 · 2 citationsarXiv
Three binary-source binary-lens microlensing events from the 2024 microlensing campaign2509.11495v1 · Cheongho Han, Chung-Uk Lee, Andrzej Udalski et al.2025 · 1 citationarXiv
Six microlensing planets detected via sub-day signals during the 2023 -- 2024 season2509.05522v1 · Cheongho Han, Chung-Uk Lee, Andrzej Udalski et al.2025 · 1 citationarXiv
Four binary microlenses with directly measured masses2508.11079v1 · Cheongho Han, Andrzej Udalski, Chung-Uk Lee et al.2025 · 1 citationarXiv
Observations of Microlensed Images with Dual-field Interferometry: On-sky Demonstration and Prospects2409.12227v2 · P. Mroz, S. Dong, A. Merand et al.2024 · 4 citationsApJ 980, 47 (2025)
KMT-2024-BLG-0404L: A triple microlensing system consisting of a star, a brown dwarf, and a planet2507.07326v1 · Cheongho Han, Andrzej Udalski, Chung-Uk Lee et al.2025 · 1 citationarXiv
Observational Parameters of Blue Large-amplitude Pulsators2404.16089v2 · P. Pietrukowicz, M. Latour, I. Soszynski et al.2024 · 9 citationsApJS, 279, 21 (2025)
HST pre-imaging of a free-floating planet candidate microlensing event2507.01109v1 · Mateusz Kapusta, Przemek Mroz, Yoon-Hyun Ryu et al.2025 · 3 citationsarXiv
GOTO065054+593624: a 8.5 mag amplitude dwarf nova identified in real time via Kilonova Seekers2501.11524v2 · T. L. Killestein, G. Ramsay, M. Kennedy et al.2025 · 7 citationsA&A 699, A8 (2025)
OGLE-2015-BLG-1609Lb: Sub-jovian planet orbiting a low-mass stellar or brown dwarf host2412.09676v2 · M.J. Mr'oz, R. Poleski, A. Udalski et al.2024 · 2 citationsA&A 698, A126 (2025)
Automated detection and modeling of binary microlensing events in OGLE-IV data. I. Events with well-separated bumps2504.21085v2 · R. A. P. Oliveira, R. Poleski, P. Mr'oz et al.2025 · 0 citationsarXiv
High-precision light curves of geostationary objects: The PHANTOM ECHOES 2 RPO campaign2506.01549v1 · Paul Chote, Robert Airey, James McCormac et al.2025 · 3 citationsarXiv
MOA-2022-BLG-091Lb and KMT-2024-BLG-1209Lb: Microlensing planets detected through weak caustic-crossing signals2505.22951v1 · Cheongho Han, Chung-Uk Lee, Andrzej Udalski et al.2025 · 2 citationsarXiv
Systematic Reanalysis of KMTNet Microlensing Events, Paper II: Two New Planets in Giant-Source Events2503.19471v2 · Hongjing Yang, Jennifer C. Yee, Jiyuan Zhang et al.2025 · 9 citationsarXiv
Systematic KMTNet Planetary Anomaly Search. XII. Complete Sample of 2017 Subprime Field Planets2504.20155v1 · Yuqian Gui, Weicheng Zang, Ruocheng Zhai et al.2025 · 7 citations2024, The Astronomical Journal, Volume 168, Issue 2, id.49, 16 pp
Microlensing events indicate that super-Earth exoplanets are common in Jupiter-like orbits2504.20158v1 · Weicheng Zang, Youn Kil Jung, Jennifer C. Yee et al.2025 · 38 citations2025, Science, Vol 388, Issue 6745, pp. 400-404
Asteroseismology of Long-Period Variables with OGLE-IV data: Using Global Seismic Parameters as Luminosity Indicators2503.22127v1 · Qiang Xiong, Tanda Li, Jie Yu et al.2025 · 1 citationarXiv
Analyses of anomalous lensing events detected from the UKIRT microlensing survey2503.14789v1 · Cheongho Han, Weicheng Zang, Andrzej Udalski et al.2025 · 1 citationarXiv
No massive black holes in the Milky Way halo2403.02386v3 · P. Mroz, A. Udalski, M.K. Szymanski et al.2024 · 89 citationsNature 632, 749 (2024)
Millinovae: A New Class of Transient Supersoft X-ray Sources without a Classical Nova Eruption2409.17338v2 · Przemek Mr'oz, Krzysztof Kr'ol, H'elene Szegedi et al.2024 · 4 citationsApJL 977, 37 (2024)
Limits on planetary-mass primordial black holes from the OGLE high-cadence survey of the Magellanic Clouds2410.06251v2 · Przemek Mr'oz, Andrzej Udalski, Micha\l K. Szyma'nski et al.2024 · 34 citationsApJL 976, 19 (2024)
KMT-2021-BLG-0284, KMT-2022-BLG-2480, and KMT-2024-BLG-0412: Three microlensing events involving two lens masses and two source stars2411.09096v1 · Cheongho Han, Andrzej Udalski, Ian A. Bond et al.2024 · 4 citationsarXiv
SN 2023tsz: A helium-interaction driven supernova in a very low-mass galaxy2409.14147v1 · B. Warwick, J. Lyman, M. Pursiainen et al.2024 · 7 citationsarXiv
Microlensing brown-dwarf companions in binaries detected during the 2022 and 2023 seasons2408.11248v1 · Cheongho Han, Ian A. Bond, Andrzej Udalski et al.2024 · 4 citationsarXiv
OGLE-2015-BLG-0845L: A low-mass M dwarf from the microlensing parallax and xallarap effects2404.13031v2 · Zhecheng Hu, Wei Zhu, Andrew Gould et al.2024 · 1 citationarXiv
GERry: A Code to Optimise the Hunt for the Electromagnetic Counter-parts to Gravitational Wave Events2407.18642v2 · David O'Neill, Joseph Lyman, Kendall Ackley et al.2024 · 0 citationsarXiv
The Gravitational-wave Optical Transient Observer (GOTO)2407.17176v1 · Martin J. Dyer, Kendall Ackley, Felipe Jim'enez-Ibarra et al.2024 · 20 citationsarXiv
Analysis of the full Spitzer microlensing sample I: Dark remnant candidates and Gaia predictions2407.13740v1 · Krzysztof A. Rybicki, Yossi Shvartzvald, Jennifer C. Yee et al.2024 · 4 citationsarXiv
The OGLE Collection of Variable Stars: Over 18 000 Rotating Variables toward the Galactic Bulge2406.18728v1 · P. Iwanek, I. Soszy'nski, K. Stepie'n et al.2024 · 1 citationarXiv
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