Keywords
binaries: general
ISM: abundances
stars: individual: XMMSL1 J171900.4-353217
stars: neutron
X-rays: binaries
Astrophysics - High Energy Astrophysical Phenomena
ISM: abundances
stars: individual: XMMSL1 J171900.4-353217
stars: neutron
X-rays: binaries
Astrophysics - High Energy Astrophysical Phenomena
How to Cite
X-ray Observations of the Very-Faint X-ray Transient XMMSL1 J171900.4-353217: A New Candidate Neutron Star Low-Mass X-ray Binary. (2024). Revista Mexicana De Astronomía Y Astrofísica, 60(2), 403-412. https://doi.org/10.22201/ia.01851101p.2024.60.02.18
Abstract
XMMSL1 J171900.4–353217 is a very-faint X-ray transient that was discovered in 2010 March when it exhibited an outburst. We report on 7 observations, obtained with the X-Ray Telescope (XRT) aboard the Neil Gehrels Swift Observatory between 2010 May and October. By fitting a single absorbed power-law model to the XRT spectra, we infer power-law indices of Γ = 1.8 &minus 2.7 and an absorption column density of NH = (4.6‑7.9)×1022 cm‑2. The inferred 0.5‑10 keV luminosity fluctuated irregularly and peaked at LX ≃ 1035 ‑ 1036 erg s‑1 for a distance of 4 ‑ 12 kpc. Based on the evolution of the power-law index with varying luminosity, we propose that the source most likely is a transient neutron star low-mass X-ray binary located at several kpc. If true, it would be a good candidate to search for coherent millisecond pulsations when it enters a new accretion outburst.Similar Articles
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