Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-02-19
Astrophys.J.698:L82-L85,2009
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
7 pages, 2 tables, 3 figures, ApJ Letters (accepted)
Scientific paper
10.1088/0004-637X/698/2/L82
In 2008 August, the new soft gamma-ray repeater SGR 0501+4516 was discovered by Swift. The source was soon confirmed by several groups in space- and ground-based multi-wavelength observations. In this letter we report the analysis of five short bursts from the recently discovered SGR, detected with Konus-Wind gamma-ray burst spectrometer. Properties of the time histories of the observed events, as well as results of multi-channel spectral analysis, both in the 20--300 keV energy range, show, that the source exhibits itself as a typical SGR. The bursts durations are <0.75 s and their spectra above 20 keV can be fitted by optically-thin thermal bremsstrahlung (OTTB) model with kT of 20--40 keV. The spectral evolution is observed, which resembles the SGR 1627-41 bursts, where a strong hardness-intensity correlation was noticed in the earlier Konus-Wind observations. The peak energy fluxes of all five events are comparable to highest those for known SGRs, so a less distant source is implied, consistent with the determined Galactic anti-center direction. Supposing the young supernova remnant HB9 (at the distance of 1.5 kpc) as a natal environment of the source, the peak luminosities of the bursts are estimated to be (2--5)x10^{40} erg s-1. The values of the total energy release, given the same assumptions, amount to (0.6--6)x10^{39} erg. These estimations of both parameters are typical for short SGR bursts.
Aptekar' R. L.
Cline Thomas L.
Frederiks Dmitry
Golenetskii Sergey V.
Mazets E. P.
No associations
LandOfFree
Konus-Wind observations of the new soft gamma-ray repeater SGR 0501+4516 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 Konus-Wind observations of the new soft gamma-ray repeater SGR 0501+4516, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Konus-Wind observations of the new soft gamma-ray repeater SGR 0501+4516 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-260574