BeppoSAX Observations of the Soft Gamma-Ray Repeater SGR 1806-20

Details BeppoSAX Observations of the Soft Gamma-Ray Repeater SGR 1806-20 BeppoSAX Observations of the Soft Gamma-Ray Repeater SGR 1806-20

2000-06-19

arxiv.org/abs/astro-ph/0006249v1

Astronomy and Astrophysics

Astrophysics

5 pages, latex, 2 figures, Accepted for publication on Astronomy and Astrophysics

Scientific paper

We have observed with the BeppoSAX satellite the quiescent counterpart of the Soft Gamma-ray Repeater SGR 1806-20. Observations performed in October 1998 and in March 1999 showed that this pulsar continued its long term spin-down trend at an average rate of ~8 10e-11 s/s while its flux and spectrum remained remarkably constant between the two observations, despite the soft gamma-ray bursting activity that occurred in this period. We also reanalyzed archival ASCA data, that when compared with the new BeppoSAX observations, show evidence for a long term variation in luminosity.

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