BEPPOSAX Observations of SGR 1900+14 in Quiescence and during an Active Period

Details BEPPOSAX Observations of SGR 1900+14 in Quiescence and during an Active Period BEPPOSAX Observations of SGR 1900+14 in Quiescence and during an Active Period

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...518l.103w&link_type=abstract

The Astrophysical Journal, Volume 518, Issue 2, pp. L103-L106.

Astronomy and Astrophysics

Astronomy

43

Stars: Pulsars: General, Stars: Individual: Alphanumeric: Sgr 1900+14, Stars: Neutron, X-Rays: Bursts

Scientific paper

We present results from two BeppoSAX Narrow-Field Instrument observations of SGR 1900+14 made during a quiescent and an active period of the source. We detect pulsations in the 1997 May 12-13 observation (quiescence) at 5.157190(7) s and the 1998 September 15-16 observation (active period) at 5.160261(12) s. Using results recently reported by Hurley et al., we establish a long-term spin-down rate during quiescence of 5.82(2)x10^-11 s s^-1, which implies a dipole magnetic field of ~5.5x10^14 G. We confirm deviations from a constant spin-down rate during the active period. We also find spectral similarities between SGR 1900+14 in quiescence and anomalous X-ray pulsars.

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