SIMBAD references

2020ApJ...902L...2B - Astrophys. J., 902, L2-L2 (2020/October-2)

The X-ray reactivation of the radio bursting magnetar SGR J1935+2154.

BORGHESE A., ZELATI F.C., REA N., ESPOSITO P., ISRAEL G.L., MEREGHETTI S. and TIENGO A.

Abstract (from CDS):

A few years after its discovery as a magnetar, SGR J1935+2154 started a new burst-active phase on 2020 April 27, accompanied by a large enhancement of its X-ray persistent emission. Radio single bursts were detected during this activation, strengthening the connection between magnetars and fast radio bursts. We report on the X-ray monitoring of SGR J1935+2154 from ∼3 days prior to ∼3 weeks after its reactivation, using Swift, the Nuclear Spectroscopic Telescope Array (NuSTAR), and the Neutron Star Interior Composition Explorer (NICER). We detected X-ray pulsations in the NICER and NuSTAR observations, and constrained the spin period derivative to | {dot}P| < 3×10–11 s s–1 (3σ c.l.). The pulse profile showed a variable shape switching between single and double-peaked as a function of time and energy. The pulsed fraction decreased from ∼34% to ∼11% (5-10 keV) over ∼10 days. The X-ray spectrum was well fit by an absorbed blackbody model with temperature decreasing from kTBB ∼ 1.6 to 0.45-0.6 keV, plus a nonthermal power-law component (Γ ∼ 1.2) observed up to ∼25 keV with NuSTAR. The 0.3-10 keV X-ray luminosity increased in less than 4 days from ∼6×1033d6.62 erg s–1 to about 3×1035d6.62 erg s–1 and then decreased again to 2.5×1034d6.62 erg s–1 over the following 3 weeks of the outburst, where d6.6 is the source distance in units of 6.6 kpc. We also detected several X-ray bursts, with properties typical of short magnetar bursts.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Neutron stars - Magnetars - Radio pulsars - X-ray bursts - X-ray transient sources

CDS comments: Figure 3: all sources are not in SIMBAD.

Simbad objects: 6

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2020ApJ...902L...2B and select 'bookmark this link' or equivalent in the popup menu


2021.06.24-03:25:14

© Université de Strasbourg/CNRS

    • Contact