Search for radio pulsations in four Anomalous X-ray Pulsars and discovery of two new pulsars

Abstract

We report on observations of four southern Anomalous X-ray Pulsars, (1RXS J170849.0-400910, 1E 1048.1-5937, 1E 1841-045 and AX J1845-0258), obtained at 1.4 GHz using the Parkes radio telescope. Radio pulsations from these sources have been searched (i) by directly folding the time series at a number of trial periods centered on the value of the spin rate obtained from the X-ray observations; (ii) by performing a blind search; (iii) using a code sensitive to single dedispersed pulses, in the aim to detect signals similar to those of the recently discovered Rotating RAdio Transients. No evidence for radio pulsations with an upper limit of ~0.1 mJy for any of the four targets has been found. The blind search led to the serendipitous discovery of two new pulsars, rotating with a spin period of about 0.7 s and of 92 ms respectively, and to the further detection of 18 known pulsars, two of which were also detected in the single-pulse search.

arXiv comment8 pages, 6 figures, accepted by MNRAS

References in corpus (34)

• The Parkes Multibeam Pulsar Survey: I. Observing and Data Analysis Systems, Discovery and Timing of 100 Pulsars
• Electrodynamics of Magnetars: Implications for the Persistent X-ray Emission and Spindown of the Soft Gamma Repeaters and Anomalous X-ray Pulsars
• Transient radio bursts from rotating neutron stars
• Transient pulsed radio emission from a magnetar
• Multifrequency Observations of Radio Pulse Broadening and Constraints on Interstellar Electron Density Microstructure
• Searches for Fast Radio Transients
• Re-examining the X-Ray versus Spin-Down Luminosity Correlation of Rotation Powered Pulsars
• X-Ray Emission From the Shell-Type SNR G347.3-0.5
• Discovery of Two High-Magnetic-Field Radio Pulsars
• The Parkes multibeam pulsar survey: III. Young pulsars & the discovery and timing of 200 pulsars
• The Parkes multibeam pulsar survey: IV. Discovery of 180 pulsars and parameters for 281 previously known pulsars
• An expanding radio nebula produced by a giant flare from the magnetar SGR 1806-20
• The Parkes Multibeam Pulsar Survey: V. Finding binary and millisecond pulsars
• An Optical Counterpart to the Anomalous X-ray Pulsar 4U 0142+61
• Radio Quiet Pulsars with Ultra-Strong Magnetic Fields
• Anomalous X-ray Pulsars and Soft Gamma-Ray Repeaters in supernova remnants
• A Stellar Wind Bubble Coincident with the Anomalous X-ray Pulsar 1E 1048.1-5937: Are Magnetars Formed From Massive Progenitors?
• Discovery of a Radio Source following the 27 December 2004 Giant Flare from SGR 1806-20
• A Relativistic Particle Outburst From The Soft Gamma-Ray Repeater SGR1900+14
• Is pulsar B0656+14 a very nearby RRAT source?
• PSR J1847-0130: A Radio Pulsar with Magnetar Spin Characteristics
• A XMM-Newton View of the Soft Gamma-ray Repeater SGR 1806--20: Long Term Variability in the pre-Super Giant Flare Epoch
• Discovery of Radio Emission from Transient Anomalous X-ray Pulsar XTE J1810-197
• The Spectral Evolution of Transient Anomalous X-ray Pulsar XTE J1810--197
• Post-glitch variability in the Anomalous X-ray Pulsar 1RXS J170849.0-400910
• Three XMM-Newton observations of the Anomalous X-ray Pulsar 1E 1048.1-5937: long term variations in spectrum and pulsed fraction
• New limits on the orbital parameters of 1E1048.1-5937 and 1E2259+586 from RossiXTE observations
• Discovery of the X-ray Counterpart to the Rotating Radio Transient J1819--1458
• A tale of two populations: Rotating Radio Transients and X-ray Dim Isolated Neutron Stars
• Discovery of a 7 Second Anomalous X-ray Pulsar in the Distant Milky Way
• Infrared and X-ray variability of the transient Anomalous X-ray Pulsar XTE J1810-197
• X-ray observations of the compact central object in supernova remnant G347.3-0.5
• A Search for Pulsars in Quiescent Soft X-Ray Transients. I
• RXTE Observations of the Anomalous Pulsar 4U 0142+61

Cited by in corpus (27)

• Tests of general relativity from timing the double pulsar
• The McGill Magnetar Catalog
• The strongest cosmic magnets: Soft Gamma-ray Repeaters and Anomalous X-ray Pulsars
• Magnetars: the physics behind observations
• NuSTAR discovery of a 3.76-second transient magnetar near Sagittarius A*
• A Radio-loud Magnetar in X-ray Quiescence
• Pan-STARRS1 Discovery of Two Ultra-Luminous Supernovae at z ~ 0.9
• Magnetar outbursts: an observational review
• The magnetar XTE J1810-197: variations in torque, radio flux density and pulse profile morphology
• Resonant cyclotron scattering in magnetars' emission
• Condensed Surfaces of Magnetic Neutron Stars, Thermal Surface Emission, and Particle Acceleration Above Pulsar Polar Caps
• Recent Progress on Anomalous X-ray Pulsars
• The fundamental plane for radio magnetars
• The 2008 October Swift detection of X-ray bursts/outburst from the transient SGR-like AXP 1E 1547.0-5408
• Non-thermal X-rays and interstellar gas toward the γ-ray supernova remnant RX J1713.7-3946: Evidence for X-ray enhancement around CO and HI clumps
• Discovery of a new Soft Gamma Repeater, SGR J1833-0832
• Repeated, Delayed Torque Variations Following X-ray Flux Enhancements in the Magnetar 1E1048.1$-$5937
• The FAST Galactic Plane Pulsar Snapshot survey: VI. The discovery of 473 new pulsars
• Swift and Chandra confirm the intensity-hardness correlation of the AXP 1RXS J170849.0-400910
• Adaptive optics near-infrared observations of magnetars
• Intensity-hardness correlation and deep infrared observation of the anomalous X-ray pulsar 1RXS J170849-400910
• The First Day in the Life of a Magnetar: Evolution of the Inclination Angle, Magnetic Dipole Moment and Braking Index of Millisecond Magnetars During Gamma-Ray Burst Afterglows
• Constraining Radio Emission from Magnetars
• Deep Searches for Radio Pulsations and Bursts from Four Southern Anomalous X-ray Pulsars
• Coherent radio emission from a twisted magnetosphere after magnetar-quake
• A transient, flat spectrum radio pulsar near the Galactic centre
• Upper Limits on Pulsed Radio Emission from the 6.85 s X-ray Pulsar XTE J0103-728 in the Small Magellanic Cloud