A Swift X-ray Survey Of The Localization For An Icecube 22-string Candidate Source Of High-energy Neutrinos

Details A Swift X-ray Survey Of The Localization For An Icecube 22-string Candidate Source Of High-energy Neutrinos A Swift X-ray Survey Of The Localization For An Icecube 22-string Candidate Source Of High-energy Neutrinos

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924629c&link_type=abstract

American Astronomical Society, AAS Meeting #219, #246.29

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Scientific paper

We have carried out an X-ray survey of the region of sky within 30.9′ of a candidate high-energy (E> 1TeV) neutrino source, which we named IC22 J1013.5+1124, using the Swift satellite's X-ray telescope. This source was identified as the most significant single candidate source in the point-source analy- sis of the IceCube neutrino observatory's 22-string science run (May 2007 to April 2008; Abbasi et al. (2009)). As IC22 J1013.5+1124 represents an excess at the 2.2σ level after accounting for all trials, it is not claimed to represent an astro- nomical source of high-energy neutrinos; moreover, the source is not apparent in deeper observations subsequently taken by IceCube in a 40-string configuration (April 2008 to May 2009; Abbasi et al. (2011)). Nonetheless, given the pioneering nature of the facility, the identification of even a relatively low-confidence candi- date the intriguing possibility of using IceCube, in concert with other observato- ries, to identify and study high-energy astronomical objects. Our survey achieves a median exposure of 4440 s over the target region, with 94% of the region having > 2000 s exposure, and reveals 41 X-ray sources, all with high-likelihood coun- terparts from Sloan Digital Sky Survey (SDSS) imaging. We present our X-ray catalog, comment on the likely nature of the sources and discuss lessons learnd regarding future analyses of candidate "multimessenger” astronomical sources.

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