Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Supernova Candidate at z=0.092 in XMM-Newton Archival Data   During a search for X-ray transients in the XMM-Newton archive within the
EXTraS project, we discovered a new X-ray source that is detected only during a
~5 min interval of a ~21 h-long observation performed on 2011 June 21 (EXMM
023135.0-603743, probability of a random Poissonian fluctuation:
~$1.4\times10^{-27}$). With dedicated follow-up observations, we found that its
position is consistent with a star-forming galaxy (SFR = 1-2 $M_\odot$
yr$^{-1}$) at redshift $z=0.092\pm0.003$ ($d=435\pm15$ Mpc). At this redshift,
the energy released during the transient event was $2.8\times10^{46}$ erg in
the 0.3-10 keV energy band (in the source rest frame). The luminosity of the
transient, together with its spectral and timing properties, make EXMM
023135.0-603743 a gripping analog to the X-ray transient associated to SN
2008D, which was discovered during a Swift/XRT observation of the nearby
($d=27$ Mpc) supernova-rich galaxy NGC 2770. We interpret the XMM-Newton event
as a supernova shock break-out or an early cocoon, and show that our
serendipitous discovery is compatible with the rate of core-collapse supernovae
derived from optical observations and much higher than that of tidal disruption
events.

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The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat