Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-08-19
Advances in Space Research 47 (2011) 1341-1345
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
8 pages, 4 figures, contributed talk from `Neutron Stars and Gamma Ray Bursts' accepted for dedicated volume of Advances in Sp
Scientific paper
10.1016/j.asr.2010.01.013
We highlight how the downward revision in the distance to the star cluster associated with SGR 1806-20 by Bibby et al. reconciles the apparent low contamination of BATSE short GRBs by intense flares from extragalactic magnetars without recourse to modifying the frequency of one such flare per 30 years per Milky Way galaxy. We also discuss the variety in progenitor initial masses of magnetars based upon cluster ages, ranging from ~50 Msun for SGR 1806-20 and iAXP CXOU J164710.2-455216 Westerlund 1 to ~17 Msun for SGR 1900+14 according to Davies et al. and presumably also 1E 1841-045 if it originated from one of the massive RSG clusters #2 or #3.
Bibby Joanne L.
Clark Simon J.
Crowther Paul A.
Furness James P.
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