X-ray Variability from the Compact Source in the Supernova Remnant RCW 103

Abstract

A new ASCA observation of 1E 161348-5055, the central compact X-ray source in the supernova remnant RCW 103, reveals an order-of-magnitude decrease in its 3 - 10 keV flux since the previous ASCA measurement four years earlier. This result is hard to reconcile with suggestions that the bulk of the emission is simple quasi-blackbody, cooling radiation from an isolated neutron star. Furthermore, archived EINSTEIN and ROSAT datasets spanning 18 years confirm that this source manifests long-term variability, to a lesser degree. This provides a natural explanation for difficulties encountered in reproducing the original EINSTEIN detection of 1E 161348-5055. Spectra from the new data are consistent with no significant spectral change despite the decline in luminosity. We find no evidence for a pulsed component in any of the data sets, with a best upper limit on the pulsed modulation of 13 percent. We discuss the phenomenology of this remarkable source.

5 pages with 2 embedded figures, LaTex, emulateapj.sty. To appear in the Astrophysical Journal Letters

References in corpus (7)

• The Discovery of an Anomalous X-ray Pulsar in the Supernova Remnant Kes 73
• Radio Quiet Pulsars with Ultra-Strong Magnetic Fields
• Almost Analytic Models of Ultramagnetized Neutron Star Envelopes
• The nature of the radio-quiet compact X-ray source in SNR RCW 103
• Discovery of a 7 Second Anomalous X-ray Pulsar in the Distant Milky Way
• The 69 ms Radio Pulsar Near the Supernova Remnant RCW 103
• On the nature of the compact X-ray source inside RCW 103

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