GCN Circular 17945
Subject
Swift Trigger 644596 is V404 Cyg
Date
2015-06-18T09:08:53Z (9 years ago)
From
Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani@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.