Actions for A New Low Magnetic Field Magnetar : The 2011 Outburst of Swift J1822.3-1606

Email RIS file
Bookmark
Report an Issue

A New Low Magnetic Field Magnetar : The 2011 Outburst of Swift J1822.3-1606

Author
Gotz, D.
Published
July 20, 2012.
Physical Description
1 electronic document
Additional Creators
Perna, R., Mereghetti, S., Kouveliotou, C., Pons, J. A., Mignani, R. P., Israel, G.L., Turolla, R., Zane, S.., Camero-Arramz, A., Burgay, M., Makishma, K., Rea, N., Possenti, A., Oates, S. R., Gehrels, N., Tiengo, A., Enoto, T., Stella, L., Palmer, D. M., Campana, T., Esposito, P., and Gogus, E.
Online Version

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
We report on the long-term X-ray monitoring with Swift, RXTE, Suzaku, Chandra, and XMM-Newton of the outburst of the newly discovered magnetar Swift J1822.31606 (SGR 18221606), from the first observations soon after the detection of the short X-ray bursts which led to its discovery, through the first stages of its outburst decay (covering the time span from 2011 July until the end of 2012 April).We also report on archival ROSAT observations which detected the source during its likely quiescent state, and on upper limits on Swift J1822.31606's radio-pulsed and optical emission during outburst, with the Green Bank Telescope and the Gran Telescopio Canarias, respectively. Our X-ray timing analysis finds the source rotating with a period of P = 8.43772016(2) s and a period derivative P-dot = 8.3(2)10(exp 14) s/ s, which implies an inferred dipolar surface magnetic field of B approx. = 2.710(exp 13) G at the equator. This measurement makes Swift J1822.31606 the second lowest magnetic field magnetar (after SGR 0418+5729). Following the flux and spectral evolution from the beginning of the outburst, we find that the flux decreased by about an order of magnitude, with a subtle softening of the spectrum, both typical of the outburst decay of magnetars. By modeling the secular thermal evolution of Swift J1822.31606, we find that the observed timing properties of the source, as well as its quiescent X-ray luminosity, can be reproduced if it was born with a poloidal and crustal toroidal fields of B(sup p) approx.. 1.510(exp 14) G and B(sub tor) approx.. 710(exp 14) G, respectively, and if its current age is approx. 550 kyr.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 20140010244.
GSFC-E-DAA-TN9275.
The Astrophysical Journal; Volume 754; No. 1; 27.
Terms of Use and Reproduction
Copyright, Distribution as joint owner in the copyright.
View MARC record | catkey: 15414029