Probing for the host galaxies of the fast X-ray transients XRT 000519 and XRT 110103

Abstract

Over the past few years, $\sim$30 extragalactic fast X-ray transients (FXRTs) have been discovered, mainly in Chandra and XMM-Newton data. Their nature remains unclear, with proposed origins including a double neutron star merger, a tidal disruption event involving an intermediate-mass black hole and a white dwarf, or a supernova shock breakout. A decisive differentiation between these three promising mechanisms for their origin requires an understanding of the FXRT energetics, environments, and/or host properties. We present optical observations obtained with the Very Large Telescope for the FXRTs XRT 000519 and XRT 110103 and Gran Telescopio Canarias observations for XRT 000519 designed to search for host galaxies of these FXRTs. In the $g_s$, $r_s$ and $R$-band images, we detect an extended source on the North-West side of the $\sim$ $1^{\prime \prime }$ (68% confidence) error circle of the X-ray position of XRT 000519 with a Kron magnitude of $g_s=$26.29$\pm$0.09 (AB magnitude). We discuss the XRT 000519 association with the probable host candidate for various possible distances, and we conclude that if XRT 000519 is associated with the host candidate a supernova shock breakout scenario is likely excluded. No host galaxy is found near XRT 110103 down to a limiting magnitude of $R>25.8$.

arXiv comment11 pages, 11 figures, submitted to MNRAS

References in corpus (52)

• Astropy: A Community Python Package for Astronomy
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Detailed Decomposition of Galaxy Images. II. Beyond Axisymmetric Models
• Cosmic-Ray Rejection by Laplacian Edge Detection
• A Cosmology Calculator for the World Wide Web
• Short-Duration Gamma-Ray Bursts
• The Fifth Data Release of the Sloan Digital Sky Survey
• Automated data reduction workflows for astronomy
• Intermediate-Mass Black Holes
• The Nature of Accreting Black Holes in Nearby Galaxy Nuclei
• The Faintest Dwarf Galaxies
• Hydrodynamical Simulations to Determine the Feeding Rate of Black Holes by the Tidal Disruption of Stars: The Importance of the Impact Parameter and Stellar Structure
• Optical Flares from the Tidal Disruption of Stars by Massive Black Holes
• An extremely luminous X-ray outburst at the birth of a supernova
• Short Duration Gamma-Ray Bursts with Extended Emission from Proto-Magnetar Spin-Down
• A New Sample of Low-mass Black Holes in Active Galaxies
• Early supernovae light-curves following the shock-breakout
• Multiband lightcurves of tidal disruption events
• Analytical approximations of K-corrections in optical and near-infrared bands
• Tidal disruption and ignition of white dwarfs by moderately massive black holes
• Chandra Observations of "The Antennae" Galaxies (NGC 4038/39)
• The Superluminous Transient ASASSN-15lh as a Tidal Disruption Event from a Kerr Black Hole
• The Most Luminous Supernovae
• A universal ultraviolet-optical colour-colour-magnitude relation of galaxies
• Supernova PTF 09uj: A possible shock breakout from a dense circumstellar wind
• A radio jet from the optical and x-ray bright stellar tidal disruption flare ASASSN-14li
• Growth of Intermediate-Mass Black Holes in Globular Clusters
• A magnetar-powered X-ray transient as the aftermath of a binary neutron-star merger
• Gravitational Waves and Intermediate-mass Black Hole Retention in Globular Clusters
• Three-Dimensional Simulations of Tidally Disrupted Solar-Type Stars and the Observational Signatures of Shock Breakout
• Micro - tidal disruption events by stellar compact objects and the production of ultra-long GRBs
• Shock breakout theory
• HiPERCAM: a quintuple-beam, high-speed optical imager on the 10.4-m Gran Telescopio Canarias
• Discovery of a new kind of explosive X-ray transient near M86
• Scaling Properties of Galaxy Groups
• A New, Faint Population of X-ray Transients
• The Close Stellar Companions to Intermediate Mass Black Holes
• A minor body falling onto a neutron star as an explanation for the unusual gamma-ray burst GRB 101225A
• Ultraluminous X-ray bursts in two ultracompact companions to nearby elliptical galaxies
• Two fast X-ray transients in archival Chandra data
• Blasts from the Past: Supernova Shock Breakouts among X-Ray Transients in the XMM-Newton Archive
• Tidal Disruptions of White Dwarfs: Theoretical Models and Observational Prospects
• What will blue compact dwarf galaxies evolve into?
• Radio Emission from the unbound Debris of Tidal Disruption Events
• A Supernova Candidate at z=0.092 in XMM-Newton Archival Data
• Size distribution of galaxies in SDSS DR7: weak dependence on halo environment
• Fast X-ray Transients and Their Connection to Gamma-Ray Bursts
• Light Curves of Partial Tidal Disruption Events
• Gravitational waves from the collision of tidally disrupted stars with massive black holes
• On the Binary-Neutron-Star Post-Merger Magnetar Origin of XRT 210423
• Fast Extragalactic X-ray Transients From Gamma Ray Bursts Viewed Far Off Axis
• Structure and Evolution of Dwarf Galaxies

Cited by in corpus (2)

• Extragalactic fast X-ray transient candidates discovered by Chandra (2000-2014)
• The Luminosity Phase Space of Galactic and Extragalactic X-ray Transients Out to Intermediate Redshifts