Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...361..240m&link_type=abstract
Astronomy and Astrophysics, v.361, p.240-244 (2000)
Astronomy and Astrophysics
Astrophysics
21
Stars: Individual: Sgr 1806-20, Stars: Neutron, Gamma Rays: Observations, X-Rays: Stars
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 10-11 s s-1 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.
Cremonesi Davide
Feroci Marco
Mereghetti Sandro
Tavani Marco
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