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A Search for X-Ray Flashes with XMM-Newton | N.M. Law
; R.E. Rutledge
; S.R. Kulkarni
; | Date: |
20 Oct 2003 | Journal: | Mon.Not.Roy.Astron.Soc. 350 (2004) 1079 | Subject: | astro-ph | Affiliation: | 1 and 2), R.E. Rutledge , S.R. Kulkarni ( IOA Cambridge, Caltech | Abstract: | We searched for X-ray flashes (XRFs) -- which we defined as ~10s duration transient X-ray events observable in the 0.4-15 keV passband -- in fields observed using XMM-Newton with the EPIC/pn detector. While we find two non-Poissonian events, the astrophysical nature of the events is not confirmed in fully simultaneous observations with the EPIC/MOS detectors, and we conclude that the events are anomalous to the EPIC/pn detector. We find a 90% upper limit on the number of flashes per sky per year at two different incoming flash fluxes: 4.0x10^9 events / sky / year for a flux of 7.1x10^-13 erg / cm^2 / s and 6.8x10^7 events / sky / year for 1.4x10^-11 erg / cm^2 / s. These limits are consistent with an extrapolation from the BeppoSAX/WFC XRF rate at much higher fluxes (about a factor of 10^5), assuming an homogenous population, and with a previous, more stringent limit derived from ROSAT pointed observations. | Source: | arXiv, astro-ph/0310555 | Services: | Forum | Review | PDF | Favorites |
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