Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-01-02
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures, presented at the "Gamma Ray Bursts in the Swift Era" conference
Scientific paper
10.1063/1.2207859
To identify extragalactic magnetar flares, we have searched for their periodic tails by generating Lomb periodograms of the emission following short bursts detected by the Burst and Transient Source Experiment (BATSE). Out of 358 short bursts examined, one has a significant tail periodicity (T = 13.8 s, P = 4 x 10^-5). The most probable host galaxy for this burst is "The Fireworks Galaxy" NGC 6946 (d = 5.9 Mpc). At this distance, the energy of the spike, (2.7 +/- 0.3) x 10^44 ergs, is akin to those of the galactic magnetar giant flares, as are its duration (~ 0.4 s) and temperature (250 +/- 60 keV). For the tail emission, however, our estimated temperature of 60 +/- 5 keV is harder and the energy release of (4.3 +/- 0.8) x 10^45 ergs is larger than those of the galactic magnetar flares. Regardless of the host, such a large ratio of tail-to-spike energy would imply that magnetar flare tails might be detectable out to further distances than previously thought.
No associations
LandOfFree
A Magnetar Flare in the BATSE Catalog? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Magnetar Flare in the BATSE Catalog?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Magnetar Flare in the BATSE Catalog? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-40634