Issue |
A&A
Volume 476, Number 1, December II 2007
|
|
---|---|---|
Page(s) | 331 - 333 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361:20078330 | |
Published online | 23 October 2007 |
A strong upper limit on the pulsed radio luminosity of the compact object 1RXS J141256.0+792204
1
Astronomical Institute “Anton Pannekoek”, University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands e-mail: jhessels@science.uva.nl
2
Stichting ASTRON, Postbus 2, 7990 AA Dwingeloo, The Netherlands e-mail: stappers@astron.nl
3
Department of Physics, McGill University, 3600 University, H3A 2T8 Montreal, QC, Canada e-mail: rutledge@physics.mcgill.ca
4
Department of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, USA e-mail: dfox@astro.psu.edu, ahs148@psu.edu
Received:
21
July
2007
Accepted:
11
October
2007
Context.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 pc.
Aims.We investigated this hypothesis by searching for radio pulsations using the Westerbork Synthesis Radio Telescope.
Methods.We observed 1RXS J141256.0+792204 at 385 and 1380 MHz, 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.
Results.No radio pulsations were detected in these observations, resulting in
pulsed radio luminosity limits of ≈ 0.3 (d/250 pc)2 mJy kpc2 and
≈ 0.03 (d/250 pc)2 mJy kpc2 at 400 and 1400 MHz respectively.
Conclusions.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.
Key words: stars: neutron / stars: pulsars: general
© ESO, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.