ASCA Discovery of an X-Ray Pulsar in the Error Box of SGR 1900+14
Hurley, K., Li, P., Kouveliotou, C., Murakami, T., Ando, M., Strohmayer, T.,
van Paradijs, J., Vrba, F., Luginbuhl, C., Yoshida, A., & Smith, I.
We present a 2-10 keV ASCA observation of the field around the soft gamma
repeater SGR 1900+14.
One quiescent X-ray source was detected in this observation, and it was
in the SGR error box.
In 2-10 keV X-rays, its spectrum may be fitted by a power law with index
-2.2, and its unabsorbed flux is 9.6x10^-12 ergs cm^-2 s^-1.
We also find a clear 5.16 s period.
The properties of the three well-studied soft gamma repeaters are remarkably
similar to one another, and they provide evidence that all of them are
associated with young, strongly magnetized neutron stars in supernova
remnants.
Status:
1999, ApJ, 510, L111.
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