The spin-down of Swift J1834.9-0846: confirmation as magnetar

Details The spin-down of Swift J1834.9-0846: confirmation as magnetar The spin-down of Swift J1834.9-0846: confirmation as magnetar

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3577....1k&link_type=abstract

The Astronomer's Telegram, #3577

Astronomy and Astrophysics

Astronomy

3

X-Ray, Gamma Ray, Neutron Star, Soft Gamma-Ray Repeater, Transient, Pulsar

Scientific paper

Data from monitoring observations with RXTE PCA and Swift XRT of Swift J1834.9-0846 (GRB110807A) covering a time span of about 2 weeks (MJD 55782-55795) since its discovery on August 7, 2011 (GCN #12253; GCN #12255) have been used to construct an accurate phase-coherent timing solution using barycentered (see GCN #12253 for the source position) pulse arrival times (ToA's) obtained by cross-correlation with a pulse-profile template.
Fitting two frequency parameters to the TOA set (5 XRT/3 PCA observations) we obtained, Nu = 0.40285190(8) Hz, consistent with the value derived by Gogus (ATEL #3542), and dNu/dt = -1.3(2)E-12 Hz/s for Epoch 55783.0 MJD (TDB timescale).

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