XMM-Newton observation of the newly discovered magnetar SGR 1830-0645
ATel #14099; A. Borghese, F. Coti Zelati, N. Rea (ICE-CSIC, IEEC), G. L. Israel (INAF), P. Esposito (IUSS Pavia), on behalf of a larger collaboration.
on 16 Oct 2020; 10:52 UT
Credential Certification: Alice Borghese (borghese@ice.csic.es)
Subjects: X-ray, Neutron Star, Soft Gamma-ray Repeater, Transient, Magnetar
Referred to by ATel #: 14102
We observed the new magnetar SGR 1830-0645 (ATEL #14083, #14085, #14086, #14092, #14097) with XMM-Newton for an on-source time of 23.6 ks, starting on October 11 at 21:06:04 UTC and ending on October 12 at 03:40:03 UTC. The source is detected at a net count rate of about 7 counts/s in the 0.3-10 keV energy interval in the EPIC-pn.
The X-ray spectrum in the range 0.3-10 keV is well described by an absorbed double-blackbody model. The hydrogen column density nH is equal to (1.03 +/- 0.03) x 1022 cm-2. The best-fitting temperatures for the two thermal components are 0.49 +/- 0.02 keV and 1.16 +/- 0.01 keV. Uncertainties are at 1 sigma confidence level. The observed flux was about 4 x 10-11 erg cm-2 s-1 (0.3-10 keV).
From a preliminary timing analysis, we find coherent pulsations at a period of 10.41571(1) s (1 sigma uncertainty).
We thank the XMM-Newton PI, Norbert Schartel, for approving the DDT request and the XMM-Newton SOC for carrying out the observation.
