Swift monitoring of the central X-ray source in RCW103

P. Esposito, R. Turolla, A. De Luca, G. L. Israel, A. Possenti, D. N. Burrows

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


The X-ray source 1E161348-5055 lies at the centre of the 2-kyr-old supernova remnant RCW103. Owing to its 24-ks modulation, orders-of-magnitude flux variability over a few months/years and lack of an obvious optical counterpart, 1E161348-5055 defies assignment to any known class of X-ray sources. Starting from 2006 April, Swift observed 1E161348-5055 with its X-Ray Telescope for ∼2ks approximately once per month. During the five years covered, the source has remained in a quiescent state, with an average observed flux of ∼1.7 × 10-12ergcm-2s-1 (1-10keV), ∼20 times lower than the historical maximum attained in its 1999-2000 outburst. The long time-span of the Swift data allows us to obtain an accurate measure of the period of 1E161348-5055 [P= 24030.42(2)s] and to derive the first upper limit on its period derivative (ss-1 at 3σ).

Original languageEnglish (US)
Pages (from-to)170-175
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
StatePublished - Nov 2011

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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