Network Synthesis Localization of Two Soft Gamma Repeaters
Abstract
We introduce the method of 'network synthesis,' which allows the detection of very weak gamma-ray transient signals in the data of the Ulysses gamma-ray burst (GRB) experiment from repeating sources. It consists of defining a grid of alpha, delta values, and for each BATSE detection of a burst from a soft gamma repeater, predicting the arrival time of the burst at Ulysses and co-adding the Ulysses data rephased so that the burst signals are aligned in time and produce a detectable pulse. We demonstrate that this method identifies the position of the soft repeater SGR 1806-20, and apply it to the repeater B1900+14. We show that the counterpart to this burst source is probably in or in the vicinity of the Galactic supernova remnant G42.8+0.6.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1994
- DOI:
- 10.1086/187465
- Bibcode:
- 1994ApJ...431L..31H
- Keywords:
-
- Gamma Ray Astronomy;
- Gamma Ray Bursts;
- Magellanic Clouds;
- Neutron Stars;
- Supernovae;
- Energy Spectra;
- Network Synthesis;
- Spatial Distribution;
- Stellar Luminosity;
- Ulysses Mission;
- Space Radiation;
- GAMMA RAYS: BURSTS;
- STARS: NEUTRON