Considering that the existence of relativistic particles in protostellar jet has been confirmed by detection linearly polarized radio emission from HH 80-81 jet, we search for gamma-rays system using ten-year {\it Fermi}-LAT observations. A significant point-like $\gamma$-ray excess is found direction with Test-Statistic (TS) value $>$100, which likely produced jet. The spectrum extends only to...

We consider the recent report that the supernova remnant W49B is a GammaRay Burst (GRB) remnant in our Galaxy. If this is correct, and if GRBs are sources of ultrahigh-energy cosmic rays (UHECRs), a natural consequence of this identification would be a detectable GeV-TeV photon emission around the GRB remnant. The imaging of the surrounding emission could provide new constraints on the jet stru...

We report on gamma-ray observations of the supernova remnant (SNR) RX J0852.0−4622 with the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope. In the Fermi LAT data, we find a spatially extended source at the location of the SNR. The extension is consistent with the SNR size seen in other wavelengths such as X-rays and TeV gamma rays, leading to the identification of the gam...

3-Amino-1,2,4-benzotriazine-1,4-dioxide (SR 4233) is a bioreductive anticancer drug which has a high selective toxicity to hypoxic cells. We have characterized the DNA and chromosome damage in wild-type Chinese hamster ovary (CHO) cells and mutant XR-1 cells after exposure to SR 4233 under hypoxia and compared it to the damage produced by ionizing radiation (gamma-rays). Using the technique of ...

Interactions of grazing incidence, ultra high energy cosmic rays with the earth's atmosphere may provide a new method of studying energetic cosmic rays with gammaray satellites. It is found that these cosmic ray interactions may produce gamma-rays on millisecond time scales which may be detectable by satellites. An extremely low gamma-ray background for transient gamma-ray events and a large ar...

Selected results from the HEGRA experiment on charged Cosmic Rays and on very high energy gamma-rays are presented. The MAGIC Telescope is presented as an outlook to the future of Gamma-Ray astronomy.