Radio and X-ray observations of giant pulses from XTE J1810-197
arXiv:2111.01641 · doi:10.1093/mnras/stab3223
Abstract
We present the results of two years of radio and X-ray monitoring of the magnetar XTE J1810197 since the radio re-activation in late 2018. Single pulse analysis of radio observations from the Lovell and MkII telescopes at 1564 MHz and the Effelsberg telescope at 6 GHz has resulted in the detection of a total of 91 giant pulses (GPs) between MJDs 58858 and 59117. These GPs appear to be confined to two specific phase ranges (0.473 <= ϕ<= 0.502$ and 0.541 <= ϕ<= 0.567). We also observe that the first detection of GP emission corresponds to a minimum in the spin-down rate. Simultaneous radio and X-ray observations were performed on MJDs 59009 and 59096. The 0.5-10 keV X-ray spectrum from NICER is well characterised by a two component blackbody model that can be interpreted as two hot spots on the polar cap of the neutron star. The blackbody temperature decreases with time, consistent with the previous outburst, while the change in the pulsed fraction does not follow the same trend as was seen in the previous outburst. The radio and X-ray flux of XTE J1810-197 are correlated during the initial phase of the outburst (MJD 58450 - MJD 58550) and an increase in the radio flux is observed later that may be correlated to the onset of GPs. We argue that the disparity in the evolution of the current outburst compared to the previous one can be attributed to a change in geometry of the neutron star.
arXiv commentAccepted for publication in MNRAS
References in corpus (47)
- On the Absorption of X-rays in the Interstellar Medium
- Magnetars
- A Repeating Fast Radio Burst
- A bright millisecond-duration radio burst from a Galactic magnetar
- DSPSR: Digital Signal Processing Software for Pulsar Astronomy
- A strong magnetic field around the supermassive black hole at the centre of the Galaxy
- Transient pulsed radio emission from a magnetar
- Corona of Magnetars
- INTEGRAL discovery of a burst with associated radio emission from the magnetar SGR 1935+2154
- FRB 121102 Bursts Show Complex Time-Frequency Structure
- 1E 1547.0-5408: a radio-emitting magnetar with a rotation period of 2 seconds
- Discovery of a New Transient Magnetar Candidate: XTE J1810-197
- A concordance picture of FRB 121102 as a flaring magnetar embedded in a magnetized ion-electron wind nebula
- A Radio-loud Magnetar in X-ray Quiescence
- A variable absorption feature in the X-ray spectrum of a magnetar
- A sample of low energy bursts from FRB 121102
- The High Time Resolution Universe Survey - V: Single-pulse energetics and modulation properties of 315 pulsars
- High time-resolution observations of the Vela pulsar
- Polarized radio emission from a magnetar
- Giant pulses from the Crab pulsar: A wide-band study
- LEAP: the large European array for pulsars
- Discovery of Radio Emission from Transient Anomalous X-ray Pulsar XTE J1810-197
- Investigation of the bi-drifting subpulses of radio pulsar B1839-04 utilising the open-source data-analysis project PSRSALSA
- The variable radio-to-X-ray spectrum of the magnetar XTE J1810-197
- The High Time Resolution Universe survey XIV: Discovery of 23 pulsars through GPU-accelerated reprocessing
- The Spectral Evolution of Transient Anomalous X-ray Pulsar XTE J1810--197
- The UTMOST pulsar timing programme II: Timing noise across the pulsar population
- Fading of the Transient Anomalous X-ray Pulsar XTE J1810-197
- The Anatomy of a Magnetar: XMM Monitoring of the Transient Anomalous X-ray Pulsar XTE J1810-197
- Radio disappearance of the magnetar XTE J1810-197 and continued X-ray timing
- Wideband polarized radio emission from the newly revived magnetar XTE J1810197
- Simultaneous multi-telescope observations of FRB 121102
- Repeating fast radio bursts with WSRT/Apertif
- From outburst to quiescence: the decay of the transient Anomalous X-ray Pulsar XTE J1810-197
- Radio spectrum of the AXP J1810-197 and of its profile components
- Simultaneous multi-frequency single-pulse properties of AXP XTE J1810-197
- The Thousand-Pulsar-Array programme on MeerKAT III: Giant pulse characteristics of PSR J05406919
- Detection of the magnetar SGR J1745-2900 up to 291 GHz with evidence of polarized millimetre emission
- Spin frequency evolution and pulse profile variations of the recently re-activated radio magnetar XTE J1810-197
- Properties and Interpretations of Giant Micropulses and Giant Pulses from Pulsars
- Peculiar Spin Frequency and Radio Profile Evolution of PSR J11196127 Following Magnetar-like X-ray Bursts
- Distinct properties of the radio burst emission from the magnetar XTE J1810-197
- The 2018 X-ray and Radio Outburst of Magnetar XTE J1810-197
- High-cadence observations and variable spin behaviour of magnetar Swift J1818.0-1607 after its outburst
- The X-ray evolution and geometry of the 2018 outburst of XTE J1810-197
- The 11 years of low-activity of the magnetar XTE J1810-197
- Detection of the magnetar XTE J1810-197 at 150 and 260 GHz with the NIKA2 Kinetic Inductance Detector camera