X-ray Observations of the Very-Faint X-ray Transient XMMSL1 J171900.4-353217: A New Candidate Neutron Star Low-Mass X-ray Binary

Bibcode
2024RMxAA..60..403A
DOI
10.48550/arXiv.2409.19649
Ahmed, O.; Degenaar, N.; Wijnands, R.; Armas Padilla, M.
Bibliographical reference

Revista Mexicana de Astronomia y Astrofisica

Advertised on:
10
2024
Journal
Revista Mexicana de Astronomía y Astrofísica
Number of authors
4
IAC number of authors
1
Citations
0
Refereed citations
0
Description
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.
Related projects
Black hole in outburst
Black holes, neutron stars, white dwarfs and their local environment
Accreting black-holes and neutron stars in X-ray binaries provide an ideal laboratory for exploring the physics of compact objects, yielding not only confirmation of the existence of stellar mass black holes via dynamical mass measurements, but also the best opportunity for probing high-gravity environments and the physics of accretion; the most
Montserrat
Armas Padilla
In progress
Type
Refereed
Stellar & Interstellar Physics (FEEI)

It may interest you

  • Refereed
    Transit-timing variations in the AU Mic system observed with CHEOPS
    Context. AU Mic is a very active M dwarf star with an edge-on debris disk and two known transiting sub-Neptunes with a possible third planetary companion. The two transiting planets exhibit significant transit-timing variations (TTVs) that are caused by the gravi tational interaction between the bodies in the system. Aims. Using photometrical
    Boldog, Á. et al.

    Advertised on:

    2
    2025
    Bibcode
    2025A&A...694A.137B
    Citations
    0
  • Refereed
    Constraints on f(R) gravity from thermal-Sunyaev-Zel'dovich-effect-selected SPT galaxy clusters and weak lensing mass calibration from DES and HST
    We present constraints on the f(R) gravity model using a sample of 1005 galaxy clusters in the redshift range 0.25–1.78 that have been selected through the thermal Sunyaev-Zel'dovich effect from South Pole Telescope data and subjected to optical and near-infrared confirmation with the multicomponent matched filter algorithm. We employ weak
    Vogt, S. M. L. et al.

    Advertised on:

    2
    2025
    Bibcode
    2025PhRvD.111d3519V
    Citations
    5
  • Refereed
    State-dependent signatures of jets and winds in the optical and infrared spectrum of the black hole transient GX 339–4
    GX 339–4 is one of the prototypical black hole X-ray transients, exhibiting recurrent outbursts that allow detailed studies of black hole accretion and ejection phenomena. In this work we present four epochs of optical and near-infrared spectroscopy obtained with X-shooter at the Very Large Telescope. The dataset includes two hard state spectra
    Ambrifi, A. et al.

    Advertised on:

    2
    2025
    Bibcode
    2025A&A...694A.109A
    Citations
    0