Skip to main content
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 3665

GRB050724: a short-burst detected by Swift
2005-07-24T13:34:04Z (19 years ago)
Stefano Covino at Brera Astronomical Observatory <>
S. Covino (INAF/OAB), L.A. Antonelli (INAF/OAR), P. Romano (INAF/OAB),
D. Palmer (LANL), C. Markwardt(GSFC, UMd), D. Burrows (PSU), N. Gehrels
(GSFC), S. Barthelmy (GSFC), M. Chester (PSU), S. Hunsberger (PSU), J.
Cummings (GSFC/NRC) on behalf of the Swift team

At 12:34:09 UT, Swift-BAT triggered and located GRB050724
(trigger=147478). The spacecraft slewed immediately. The BAT on-board
calculated location is RA,Dec 246.214, -27.524 {+16h 24m 51s, -27d 31'
25"} (J2000), with an uncertainty of 3 arcmin (radius, 90% containment,
stat+sys). The light curve appears to be short, with full-width half
maximum of less than 0.25 sec, and a peak rate of 10,000 ct/s in that

The XRT started the observation at 12:35:22.9  UT with XRT in automatic
state, 74 sec after the BAT Trigger. A rapidly fading, uncatalogued, X-
ray source was detected at the following position RA, Dec 16h 24m 44.9s,
-27d 32' 34.0" with an uncertainty of about 6 arcsec (90% containment).
This is 1.78 arcmin from the BAT position reported above.

This message can be cited.
Looking for U.S. government information and services? Visit