[vsnet-grb-info 16664] Swift Trigger 644596 is V404 Cyg
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Thu Jun 18 18:09:01 JST 2015
TITLE: GCN CIRCULAR
NUMBER: 17945
SUBJECT: Swift Trigger 644596 is V404 Cyg
DATE: 15/06/18 09:08:53 GMT
FROM: Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani at dark-cosmology.dk>
J. R. Cummings (NASA/UMBC), A. Y. Lien (GSFC/UMBC),
D. Malesani (DARK/NBI) and K. L. Page (U Leicester) report on behalf
of the Swift Team:
At 08:52:26 UT, the Swift Burst Alert Telescope (BAT) triggered and located
V404 Cyg (trigger=644596) again, with a somewhat higher flux level than the
previous triggers. Swift did not slew promptly to the source due to an
observing constraint. The BAT on-board calculated location is
RA, Dec 305.998, +33.864 which is
RA(J2000) = 20h 24m 00s
Dec(J2000) = +33d 51' 49"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed some weak variability.
The peak count rate was ~1637 counts/sec (15-350 keV), at ~5 sec after the trigger.
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