Abstract
We report the results of two ROSAT HRI observations of the recently discovered ~11 s X-ray pulsar 1RXS J170849.0-400910. A refined position with a smaller error radius (10'' uncertainty) and a new spin-period measurement were obtained. These results allowed us to derive a period derivative of ~7 × 10-4 s yr-1 and to perform a photometric and spectroscopic study of the possible optical counterparts of the source. The limits derived from the optical-to-X-ray flux ratio exclude the presence of a massive OB companion. These findings, together with the nearly constant X-ray flux across observations spanning 3 years, strongly support the inclusion of this ~11 s pulsar in the class of anomalous X-ray pulsars.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
