A Strong Upper Limit on the Pulsed Radio Luminosity of the Compact Object 1RXS J141256.0+792204

Abstract

The ROSAT X-ray source 1RXS J141256.0+792204 has recently been identified as a likely compact object whose properties suggest it could be a very nearby radio millisecond pulsar at d = 80 - 260pc. We investigated this hypothesis by searching for radio pulsations using the Westerbork Synthesis Radio Telescope. We observed 1RXS J141256.0+792204 at 385 and 1380MHz, recording at high time and frequency resolution in order to maintain sensitivity to millisecond pulsations. These data were searched both for dispersed single pulses and using Fourier techniques sensitive to constant and orbitally modulated periodicities. No radio pulsations were detected in these observations, resulting in pulsed radio luminosity limits of L_400 ~ 0.3 (d/250pc)^2 mJy kpc^2 and L_1400 ~ 0.03 (d/250pc)^2 mJy kpc^2 at 400 and 1400MHz respectively. The lack of detectable radio pulsations from 1RXS J141256.0+792204 brings into question its identification as a nearby radio pulsar, though, because the pulsar could be beamed away from us, this hypothesis cannot be strictly ruled out.

arXiv commentTo appear in A&A. 3 pages

References in corpus (8)

• The ATNF Pulsar Catalogue
• Fourier Techniques for Very Long Astrophysical Time Series Analysis
• The characteristics of millisecond pulsar emission: I. Spectra, pulse shapes and the beaming fraction
• Observations of 20 millisecond pulsars in 47 Tucanae at 20 cm
• A Deep Chandra Survey of the Globular Cluster 47 Tucanae: Catalog of Point Sources
• A 1.4-GHz Arecibo Survey for Pulsars in Globular Clusters
• An Extensive Census of HST Counterparts to Chandra X-ray Sources in the Globular Cluster 47 Tucanae. II. Time Series and Analysis
• The radio luminosity distribution of pulsars in 47 Tucanae

Cited by in corpus (13)

• X-ray Measurement of the Spin-Down of Calvera: a Radio- and Gamma-ray-Quiet Pulsar
• Proper Motion and Timing of Two Unusual Pulsars: Calvera and 1E 1207.4-5209
• Discovery of 59ms Pulsations from 1RXS J141256.0+792204 (Calvera)
• The needle in the haystack - Where to look for more isolated cooling neutron stars
• Neutron Star Interior Composition Explorer X-ray Timing of the Radio and Gamma-ray Quiet Pulsars PSR J1412+7922 AND PSR J1849-0001
• NICER study of pulsed thermal X-rays from Calvera: a neutron star born in the Galactic halo?
• Chandra Observations of 1RXS J141256.0+792204 (Calvera)
• Deep optical observations of unusual neutron star Calvera with the GTC
• Is Calvera a Gamma-ray Pulsar?
• No Confirmed New Isolated Neutron Stars In The SDSS Data Release 4
• New upper limits on low-frequency radio emission from isolated neutron stars with LOFAR
• Detection of the extended $\gamma$-ray emission from the high Galactic latitude Calvera's SNR candidate
• Calvera: A low-mass strangeon star torqued by debris disk?