9 papers
Improved Image Segmentation via Cost Minimization of Multiple Hypotheses
Marc Bosch, Christopher M. Gifford, Austin G. Dress +3
Image segmentation is an important component of many image understanding systems. It aims to group pixels in a spatially and perceptually coherent manner. Typically, these algorith…
Gamma-Ray Spectral States of Galactic Black Hole Candidates
J. E. Grove, W. N. Johnson, R. A. Kroeger +3
OSSE has observed seven transient black hole candidates: GRO J0422+32, GX339-4, GRS 1716-249, GRS 1009-45, 4U 1543-47, GRO J1655-40, and GRS 1915+105. Two gamma-ray spectral states…
OSSE Observations of the Soft Gamma Ray Continuum from the Galactic Plane at Longitude 95 Degrees
J. G. Skibo, W. N. Johnson, J. D. Kurfess +7
We present the results of OSSE observations of the soft gamma ray continuum emission from the Galactic plane at longitude 95 degrees. Emission is detected between 50 and 600 keV wh…
The Beaming Pattern of Doppler Boosted Thermal Annihilation Radiation: Application to MeV Blazars
J. G. Skibo, C. D. Dermer, R. Schlickeiser
The beaming pattern of thermal annihilation radiation is broader than the beaming pattern produced by isotropic nonthermal electrons and positrons in the jets of radio-emitting act…
Spallation of Iron in Black Hole Accretion Flows
Jeff Skibo
In the local Galactic interstellar medium there is approximate energy equipartition between cosmic rays, magnetic fields and radiation. If this holds in the central regions of AGN,…
High-Energy Spectral Complexity from Thermal Gradients in Black Hole Atmospheres
J. G. Skibo, C. D. Dermer
We show that Compton scattering of soft photons with energies near 100 eV in thermally stratified black-hole accretion plasmas with temperatures in the range 100 keV - 1 MeV can gi…