Too Observations of SGR 1900+14 in AN Active State

Details Too Observations of SGR 1900+14 in AN Active State Too Observations of SGR 1900+14 in AN Active State

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..728k&link_type=abstract

Chandra Proposal ID #02508045

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Chandra Proposal Id #02508045

Scientific paper

SGR 1900+14 has just emitted a second giant flare (GCN #1041); this is the second source, which has emitted giant flares (01/04/18 and 98/08/27), in the last 20 years. SGR flares are extremenly rare events and release over 10^44 ergs. The previous flare, changed the pulse shape of the neutron star significantly (from four peaks to a single peak sinusoid) indicating dramatic B-field changes. We have evidence (yet unpublished) that the pulse shape is changing back to its complex form. We wish to investigate and understand: 1) whether there is another pulse shape change associated with the current SGR activity, 2) whether there is a persistent flux change and confirm the persistent flux-flare energy output relation we have seen previously, and 3) whether we confirm a line around 6 keV seen during a burst emitted two days after the SGR 1900+14 August 27, 1998 flare. If this is a proton cyclotron line, we will for the first time be able to measure directly the magnetic field of a magnetar

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