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.

Discovery of powerful transient X-ray source A0620—00 with Ariel V Sky Survey Experiment

Abstract

ON August 3 a faint new X-ray source was discovered (at 15 Ariel counts s−1) near the boundary of the Monoceros and Orion constellations and 6° from the galactic plane, during routine monitoring of the Milky Way with the Ariel V Sky Survey Experiment (SSE). During the following week, the source—designated A0620—00—increased rapidly in intensity to become the brightest in the sky (at 2–18 keV). The X-ray light curve from continued observation with the SSE to August 16 is shown in Fig. 1. The ordinate is in Ariel counts s−1 and for comparison, the corresponding count rates for the Crab Nebula and Sco X-1 are 400 s−1 and 3,200 s−1, respectively. The precursor peak on August 6 is real and is qualitatively similar to the feature seen1 in the rise to maximum intensity of the earlier Ariel transient A1524—62. Subsequent observations of A0620—00 with the Ariel V experiments pointing along the spin axis of the spacecraft have shown the intensity to have remained very high at least until August 27.

Your institute does not have access to this article

Access options

Buy article

Get time limited or full article access on ReadCube.

$32.00

All prices are NET prices.

References

  1. Kaluzienski, L. J., et al., Astrophys. J. (in the press).

  2. Eyles, C. J., Skinner, G. K., and Willmore, A. P., IAU Circ., No. 2822 (1975).

  3. Boley, F., et al., Astrophys. J. (in the press).

  4. Ward, M. J., Pension, M. V., Murray, C. A., and Clements, E. D., Nature, 257, 659–660 (1975).

    ADS  Article  Google Scholar 

  5. Davis, R. J., Edwards, M. R., Morison, I., and Spencer, R. E., Nature, 257, 659 (1975).

    ADS  Article  Google Scholar 

  6. Kraft, R. P., Adv. Astr. Astrophys., 2, 43 (1963).

    Article  Google Scholar 

  7. Smak, J., IAU Colloquium, No. 15, 248 (1971).

  8. Bath, G. T., Evans, W. D., Papaloizou, J., and Pringle, J. E., Mon. Not. R. astr. Soc., 169, 447 (1974).

    ADS  Article  Google Scholar 

  9. Gull, T., and York, D., IAU Circ., No. 2819 (1975).

  10. Liller, W., IAU Circ., No. 2823 (1975).

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and Permissions

About this article

Cite this article

ELVIS, M., PAGE, C., POUNDS, K. et al. Discovery of powerful transient X-ray source A0620—00 with Ariel V Sky Survey Experiment. Nature 257, 656–657 (1975). https://doi.org/10.1038/257656a0

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1038/257656a0

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

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