Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

  • Letters to Editor
  • Published:

Upper Limits to the Pulsed X-ray Flux from PSR0833-45, MP0835-40 and MP0736-40

Abstract

ON November 11, 1970, a collimated proportional counter sensitive to X rays in the energy range 2.8 to 9.9 keV was flown on a Sun-stabilized Skylark sounding rocket from Woomera, South Australia. During part of the flight the detector field of view was scanned across Vela, including the position of three radio pulsars. The time of each event was telemetered to ground with a time uncertainty of approximately 300 µs, and this allowed a search for fluctuations in the X-ray flux at the period of the observed radio pulsations. The pulsars were PSR0833-45, the Vela pulsar (0.089 s period), MP0835-40 (0.766 s period) and MP0736-40 (0.375 s period).

This is a preview of subscription content, access via your institution

Access options

Buy this article

Prices may be subject to local taxes which are calculated during checkout

References

  1. Hearn, D., Nucl. Instrum. Meth., 70, 200 (1969).

    Article  ADS  Google Scholar 

  2. Sturrock, P. A., Nature, 227, 465 (1970).

    Article  ADS  Google Scholar 

  3. Harnden, F. R., and Gorenstein, P., Nature, 241, 108 (1973).

    Article  ADS  Google Scholar 

  4. Harnden, F. R., Johnson, W. N., and Haymes, R. C., Astrophys. J. Lett., 172, 91 (1972).

    Article  ADS  Google Scholar 

  5. Bunner, A. N., in The Gum Nebula and Related Problems (edit. by Maran, S. P., Brandt, J. C, and Stecker, F. W.) (Goddard Space Flight Center Report X-683-71-375).

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

CRUISE, A., NEWTON, A. Upper Limits to the Pulsed X-ray Flux from PSR0833-45, MP0835-40 and MP0736-40. Nature Physical Science 244, 121–122 (1973). https://doi.org/10.1038/physci244121b0

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1038/physci244121b0

This article is cited by

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing