WINTER on S250206dm: A near-infrared search for an electromagnetic counterpart to a gravitational-wave event

Abstract

We present near-infrared follow-up observations of the International Gravitational Wave Network (IGWN) event S250206dm with the Wide-Field Infrared Transient Explorer (WINTER). WINTER is a near-infrared time-domain survey designed for electromagnetic follow-up of gravitational-wave sources localized to $\le$300 deg${}^2$. The instrument's wide field of view (1.2 deg${}^2$), dedicated 1-m robotic telescope, and near-infrared coverage (0.9-1.7 microns) are optimized for searching for kilonovae, which are expected to exhibit a relatively long-lived near-infrared component. S250206dm is the only neutron star merger in the fourth observing run (to date) localized to $\le$300 deg${}^2$ with a False Alarm Rate below one per year. It has a $55\%$ probability of being a neutron star-black hole (NSBH) merger and a $37\%$ probability of being a binary neutron star (BNS) merger, with a $50\%$ credible region spanning 38 deg${}^2$, an estimated distance of 373 Mpc, and an overall false alarm rate of approximately one in 25 years. WINTER covered $43\%$ of the probability area at least once and $35\%$ at least three times. Through automated and human candidate vetting, all transient candidates found in WINTER coverage were rejected as kilonova candidates. Unsurprisingly, given the large estimated distance of 373 Mpc, the WINTER upper limits do not constrain kilonova models. This study highlights the promise of systematic infrared searches and the need for future wider and deeper infrared surveys.

10 pages, 2 figures

References in corpus (40)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Gaia Data Release 3: Summary of the content and survey properties
• Multi-messenger Observations of a Binary Neutron Star Merger
• Advanced LIGO
• GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi-GBM Detection of GRB 170817A
• Origin of the heavy elements in binary neutron-star mergers from a gravitational wave event
• Swope Supernova Survey 2017a (SSS17a), the Optical Counterpart to a Gravitational Wave Source
• The X-ray counterpart to the gravitational wave event GW 170817
• Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817
• The Emergence of a Lanthanide-Rich Kilonova Following the Merger of Two Neutron Stars
• Observation of gravitational waves from two neutron star-black hole coalescences
• Swift and NuSTAR observations of GW170817: detection of a blue kilonova
• A Radio Counterpart to a Neutron Star Merger
• Kilonovae
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. V. Rising X-ray Emission from an Off-Axis Jet
• A Deep Chandra X-ray Study of Neutron Star Coalescence GW170817
• The UKIRT Hemisphere Survey: Definition and J-band Data Release
• The MBTA Pipeline for Detecting Compact Binary Coalescences in the Third LIGO-Virgo Observing Run
• Extending the PyCBC search for gravitational waves from compact binary mergers to a global network
• Spitzer Mid-Infrared Detections of Neutron Star Merger GW170817 Suggests Synthesis of the Heaviest Elements
• The Million Quasars (Milliquas) Catalogue, v8
• A Morphological Classification Model to Identify Unresolved PanSTARRS1 Sources: Application in the ZTF Real-Time Pipeline
• Kilonova Luminosity Function Constraints based on Zwicky Transient Facility Searches for 13 Neutron Star Mergers
• AT2017gfo: Bayesian inference and model selection of multi-component kilonovae and constraints on the neutron star equation of state
• Realtime search for compact binary mergers in Advanced LIGO and Virgo's third observing run using PyCBC Live
• A data science platform to enable time-domain astronomy
• Palomar Gattini-IR: Survey overview, data processing system, on-sky performance and first results
• The critical role of nuclear heating rates, thermalization efficiencies and opacities for kilonova modelling and parameter inference
• Kilonova Emission From Black Hole-Neutron Star Mergers. II. Luminosity Function and Implications for Target-of-opportunity Observations of Gravitational-wave Triggers and Blind Searches
• Improved ranking statistics of the GstLAL inspiral search for compact binary coalescences
• Implications of the search for optical counterparts during the second part of the Advanced LIGO's and Advanced Virgo's third observing run: lessons learned for future follow-up observations
• The wide-field infrared transient explorer (WINTER)
• IceCube search for neutrinos coincident with gravitational wave events from LIGO/Virgo run O3
• An Infrared Search for Kilonovae with the WINTER Telescope. I. Binary Neutron Star Mergers
• Optical Alignment Method for the PRIME Telescope
• Unveiling the Dynamic Infrared Sky with Gattini-IR
• Design Requirements for the Wide-field Infrared TransientExplorer (WINTER)

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• Kilonova constraints for the LIGO/Virgo/KAGRA neutron star merger candidate S250206dm: GW-MMADS observations