更新:
@果壳网:雨燕卫星小组就此事件发表了新的公告:X射线波段未见异常,事发位点的X射线值和事件发生前差异并不显著。如果真的是伽玛暴,那么X射线波段也必然会有变化。这个新公告,让这一事件看起来更奇怪了。
原始消息来源:
http://gcn.gsfc.nasa.gov/gcn/gcn3/16336.gcn3TITLE: GCN CIRCULAR
NUMBER: 16336
SUBJECT: Swift trigger 600114 is not an outbursting X-ray source
DATE: 14/05/28 07:57:12 GMT
FROM: Kim Page at U.of Leicester <
[email protected]>
K.L. Page, P.A. Evans (U. Leicester), D.N. Burrows (PSU), V. D'Elia
(ASDC) and A. Maselli (INAF-IASFPA) report on behalf of the Swift-XRT
team:
We have re-analysed the prompt XRT data on Swift trigger 600114 (GCN Circ.
16332), taking advantage of the event data.
The initial count rate given in GCN Circ. 16332 was based on raw data from
the full field of view, without X-ray event detection, and therefore may
have been affected by other sources in M31, as well as background hot
pixels. Analysis of the event data (not fully available at the time of the
initial circular) shows the count rate of the X-ray source identified in
GCN Circ. 16332 to have been 0.065 +/- 0.012 count s^-1, consistent with
the previous observations of this source [see the 1SXPS catalogue (Evans
et al. 2014):
http://www.swift.ac.uk/1SXPS/1SXPS%20J004143.1%2B413420].
We therefore do not believe this source to be in outburst. Instead, it was
a serendipitous constant source in the field of view of a BAT subthreshold
trigger.
This circular is an official product of the Swift-XRT team.