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GCN Circular 17684

GRB 150407A: Swift-XRT observations
2015-04-08T07:39:54Z (9 years ago)
Phil Evans at U of Leicester <>
J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), A. Amaral-Rogers (U.
Leicester), J.P. Osborne (U. Leicester), A. Melandri (INAF-OAB), P.
D'Avanzo (INAF-OAB), V. D'Elia (ASDC), D.N. Burrows (PSU) and P.A.
Evans (U. Leicester) report on behalf of the Swift-XRT team:

Swift-XRT has performed follow-up observations of the
Swift/BAT-detected burst GRB 150407A (Palmer et al. GCN Circ. 17682),
collecting 2.0 ks of Photon Counting (PC) mode data between T0+68.5 ks
and T0+70.5 ks. 

No X-ray sources have been detected inside or close to the Swift/BAT
error region. The 3-sigma upper limit in the field ranges from ~0.004
to ~0.009 ct s^-1, corresponding to a 0.3-10 keV observed flux of
1.4e-13 to 3.8e-13 erg cm^-2 s^-1 (assuming a typical GRB spectrum).

The results of the XRT-team automatic analysis of the XRT observations,
including a position-specific upper limit calculator, are available at

This circular is an official product of the Swift-XRT team.
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