Chandra observation of the newly discovered magnetar, SGR 1830-0645
ATel #14097; E. Gogus (Sabanci University), C. Kouveliotou (George Washington University) and G. Younes (George Washington University)
on 15 Oct 2020; 13:29 UT
Credential Certification: Ersin Gogus (ersing@sabanciuniv.edu)
Subjects: X-ray, Soft Gamma-ray Repeater, Magnetar
We observed the newly discovered magnetar SGR 1830-0645 (ATels #14083, #14085, #14086, #14088, #14092) with Chandra/ACIS-S in 1/8 subarray mode for about 5 ks starting at 21:32:48 UTC on 2020 October 13. The source is clearly detected at a rate of 1.53 counts/s. Our preliminary spatial analysis using CIAO/wavdetect yields the precise position of RA, Dec = 277.67352, -6.75470 deg, which correspond to
RA: 18 30 41.64
Dec: -06 45 16.9
(J2000) with an uncertainty of about 0.6 arcsec (statistical only).
Timing analysis of photons in the 0.5-10 keV band collected from a circular region (radius = 5 arcsec) centered at the above position reveal a strong signal at 0.096014(7) Hz, which corresponds to a spin period of 10.4150(7) s. Note that this is consistent with the earlier measurements made with Swift/XRT (ATel #14085), NICER (ATel #14086) and NuSTAR (ATel #14092).
The X-ray spectrum of the point source is heavily piled-up. A careful investigation of its spectral properties with Chandra is currently underway.
We thank the CXO team for promptly scheduling this observation.
