Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-ray and Radio Bursts from the Magnetar 1E1547.0-5408   We report on simultaneous radio and X-ray observations of the radio-emitting
magnetar 1E1547.0-5408 on 2009 January 25 and February 3, with the 64-m Parkes
radio telescope and the Chandra and XMM-Newton X-ray observatories. The
magnetar was observed in a period of intense X-ray bursting activity and
enhanced X-ray emission. We report here on the detection of two radio bursts
from 1E1547.0-5408, reminiscent of Fast Radio Bursts (FRBs). One of the radio
bursts was anticipated by ~1s (about half a rotation period of the pulsar) by a
bright SGR-like X-ray burst, resulting in a F_radio/F_X ~ 10^-9. Radio
pulsations were not detected during the observation showing the FRB-like radio
bursts, while they were detected in the previous radio observation. We also
found that the two radio bursts are neither aligned with the latter radio
pulsations nor with the peak of the X-ray pulse profile (phase shift of ~0.2).
Comparing the luminosity of these FRB-like bursts and those reported from
SGR1935+2154, we find that the wide range in radio efficiency and/or luminosity
of magnetar bursts in the Galaxy may bridge the gap between "ordinary" pulsar
radio bursts and the extragalactic FRB phenomenon.

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The categories of this paper are: hep-th
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ph
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The categories of this paper are: nlin
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The categories of this paper are: chem-ph