Are Most of the Very High Energy Gamma-ray Unidentified Sources Relic Pulsar Wind Nebulae?
Abstract
At UT 2012-04-24 16:47:14, the Gas Slit Camera (GSC) of the Japanese Monitor of All-sky X-ray Image (MAXI) instrument on the International Space Station (ISS) detected a short x-ray transient lasting about 34 seconds. The MAXI/GSC transient was most likely a gamma-ray burst (GRB), because of the high galactic latitude, spectral hardness ratio and the absence of known bright x-ray source at the detected position. In addition, the MAXI/GSC transient coordinates were in the field of view of the inclined Tupi muon telescope located at ground (3 m above sea level) at in the South Atlantic Anomaly (SAA) region. We report here that the Tupi telescope registered a muon excess with a signal significance 6.2 σ within the MAXI/GMC transient time period. Assuming a power law function with a spectral index of -1.54 in the tail of the primary gamma ray energy spectrum, we can conclude that the fluence obtained from the muon excess detected by the Tupi telescope is consistent with the preliminarily value obtained by the MAXI team.
- Publication:
-
International Cosmic Ray Conference
- Pub Date:
- 2013
- Bibcode:
- 2013ICRC...33.2756T
- Keywords:
-
- Unidentified gamma-ray sources;
- Pulsar Wind Nebulae;
- HESS J1507-622;
- HESS J1837-069;
- HESS J1616-508;
- HESS J1702-420;
- HESS J1708-410;
- HESS J1804-216