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XMM-Newton and Chandra observations of the candidate Fermi-LAT pulsar 4FGL J1015.5-6030
Jeremy Hare, Oleg Kargaltsev, George Younes +2
4FGL J1015.5-6030 is an unidentified Fermi-LAT source hosting a bright, extended X-ray source whose X-ray spectrum is consistent with that of a young pulsar, yet no pulsations have…
Magnetar spin-down glitch clearing the way for FRB-like bursts and a pulsed radio episode
G. Younes, M. G. Baring, A. K. Harding +16
Magnetars are a special subset of the isolated neutron star family, with X-ray and radio emission mainly powered by the decay of their immense magnetic fields. Many attributes of m…
Evidence for an abundant old population of Galactic ultra long period magnetars and implications for fast radio bursts
P. Beniamini, Z. Wadiasingh, J. Hare +3
Two recent discoveries, namely PSR J0901-4046 and GLEAM-X J162759.5-523504.3 (hereafter GLEAM-X J1627), have corroborated an extant population of radio-loud periodic sources with l…
Two decades of X-ray observations of the isolated neutron star RX J1856.5-3754: detection of thermal and non-thermal hard X-rays and refined spin-down measurement
Davide De Grandis, Michela Rigoselli, Sandro Mereghetti +6
The soft X-ray pulsar RX J1856.5-3754 is the brightest member of a small class of thermally-emitting, radio-silent, isolated neutron stars. Its X-ray spectrum is almost indistingui…
Polarized Radiation Signals from Highly Magnetized Neutron Star Surfaces
Kun Hu, Matthew G. Baring, Joseph A. Barchas +1
The surfaces of neutron stars are likely sources of strongly polarized soft X rays due to the presence of strong magnetic fields. Scattering transport in the surface layers is crit…
Limits on the hard X-ray emission from the periodic fast radio burst FRB 180916.J0158+65
Sibasish Laha, Zorawar Wadiasingh, Tyler Parsotan +11
FRB 180916.J0158+65 is one of the nearest, periodically repeating, and actively bursting fast radio burst (FRB) which has been localized to the outskirts of a spiral galaxy. In thi…
Simultaneous view of the FRB~180301 with FAST and NICER during a bursting phase
Sibasish Laha, George Younes, Zorawar Wadiasingh +16
FRB180301 is one of the most actively repeating fast radio bursts (FRBs) which has shown polarization angle changes in its radio burst emission, an indication for their likely orig…
Intensity and Polarization Characteristics of Extended Neutron Star Surface Regions
Kun Hu, Matthew G. Baring, Joseph A. Barchas +1
The surfaces of neutron stars are sources of strongly polarized soft X rays due to the presence of strong magnetic fields. Radiative transfer mediated by electron scattering and fr…
Pulse Peak Migration during the Outburst Decay of the Magnetar SGR 1830-0645: Crustal Motion and Magnetospheric Untwisting
G. Younes, S. K. Lander, M. G. Baring +12
Magnetars, isolated neutron stars with magnetic field strengths typically ~G, exhibit distinctive months-long outburst epochs during which strong evolution of soft…
X-ray burst and persistent emission properties of the magnetar SGR 1830-0645 in outburst
G. Younes, C. -P. Hu, K. Bansal +18
We report on NICER X-ray monitoring of the magnetar SGR 1830-0645 covering 223 days following its October 2020 outburst, as well as Chandra and radio observations. We present the m…