[vsnet-grb-info 26148] Alert from the HAWC Burst Monitor HAWC-200814A

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  28248
SUBJECT: Alert from the HAWC Burst Monitor HAWC-200814A
DATE:    20/08/14 22:32:25 GMT
FROM:    Hugo Ayala at Pennsylvania State University  <hgayala at psu.edu>

The HAWC Collaboration  (http://www.hawc-observatory.org/collaboration/)
reports:

On 2020/08/14, at 21:38:01 UTC, HAWC detected a burst signal
from its Burst Monitoring named HAWC-200814A. This monitor system looks
for excesses above the expected background in time windows of 0.2, 1, 10,
and 100 seconds.
This event was found in the 0.2-second time window starting
at the reported trigger time.

The position of the alert is
RA (J200): 177.79 deg
Dec (J2000): 19.94 deg
Location uncertainty (68% containment): 0.8 deg (statistical only).

The monitor system found that this alert has a false alarm rate of 0.37 per
year.
We encourage follow-up observations of the HAWC alert region. We, however,
note that it is consistent with background expectations based on the
observation time.

The initial automated alert is recorded here:
https://gcn.gsfc.nasa.gov/gcn/notices_amon_hawc/9575_1797.amon

HAWC is a very-high-energy gamma-ray observatory operating in Central
Mexico at latitude 19 deg. north. Operating day and night with over
95% duty cycle, HAWC has an instantaneous field of view of 2 sr and
surveys 2/3 of the sky every day. It is sensitive to gamma rays
from 300 GeV to 100 TeV.