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9 papers · 2 filters
Milagrito: a TeV air-shower array
The Milagro Collaboration, R. Atkins
Milagrito, a large, covered water-Cherenkov detector, was the world's first air-shower-particle detector sensitive to cosmic gamma rays below 1 TeV. It served as a prototype for th…
TeV Observations of Markarian 501 with the Milagrito Water Cherenkov Detector
R. Atkins
The Milagrito water Cherenkov detector near Los Alamos, New Mexico, operated as a sky monitor at energies of a few TeV between February 1997 and May 1998 including the period of th…
A case devoid of bias: ORS voids vs. IRAS voids
Hagai El-Ad, Tsvi Piran
We present a comparison between the voids in two nearly all sky redshift surveys: the ORS and the IRAS 1.2 Jy. While the galaxies in these surveys are selected differently and thei…
Gamma-ray Bursts - A Puzzle Being Resolved
Tsvi Piran
For a few seconds a gamma-ray burst (GRB) becomes the brightest object in the Universe, over-shining the rest of the Universe combined! Clearly this reflects extreme conditions tha…
GZK Violation - a Tempest in a (Magnetic) Teapot?
Glennys R. Farrar, Tsvi Piran
The apparent lack of suitable astrophysical sources for the observed highest energy cosmic rays (UHECRs) within Mpc is the "GZK Paradox". We constrain representative m…
Some Observational Consequences of GRB Shock Models
Pawan Kumar, Tsvi Piran
In the internal shock scenario for GRBs we expect some fraction of the energy of the burst to be carried by slow moving shells that were ejected at late times. These slow shells co…