38 research outputs found
1978: Abilene Christian College Bible Lectures - Full Text
SPIRITUALITY
Being the Abilene Christian University Annual Bible Lectures 1978
Published by Abilene Christian University Book Store
ACU Station Abilene, Texas 7960
University of Texas / M.D. Anderson Cancer Center Newsletter
Monthly report discussing cancer care and research to inform physicians
University of Texas / M.D. Anderson Cancer Center Newsletter
Monthly report discussing cancer care and research to inform physicians
University of Texas / M.D. Anderson Cancer Center Newsletter
Monthly report discussing cancer care and research to inform physicians
University of Texas / M.D. Anderson Cancer Center Newsletter
Monthly report discussing cancer care and research to inform physicians
University of Texas / M.D. Anderson Cancer Center Newsletter
Monthly report discussing cancer care and research to inform physicians
University of Texas / M.D. Anderson Cancer Center Newsletter
Monthly report discussing cancer care and research to inform physicians
1964: Abilene Christian College Bible Lectures - Full Text
LEADERSHIP IN THE CHURCH”
Being the Abilene Christian College Annual Bible Lectures 1964
Price: $3.95
Published by
ABILENE CHRISTIAN COLLEGE STUDENTS EXCHANGE
ACC Station
Abilene, Texa
Gammapy: A Python package for gamma-ray astronomy
In this article, we present Gammapy, an open-source Python package for the
analysis of astronomical -ray data, and illustrate the functionalities
of its first long-term-support release, version 1.0. Built on the modern Python
scientific ecosystem, Gammapy provides a uniform platform for reducing and
modeling data from different -ray instruments for many analysis
scenarios. Gammapy complies with several well-established data conventions in
high-energy astrophysics, providing serialized data products that are
interoperable with other software packages. Starting from event lists and
instrument response functions, Gammapy provides functionalities to reduce these
data by binning them in energy and sky coordinates. Several techniques for
background estimation are implemented in the package to handle the residual
hadronic background affecting -ray instruments. After the data are
binned, the flux and morphology of one or more -ray sources can be
estimated using Poisson maximum likelihood fitting and assuming a variety of
spectral, temporal, and spatial models. Estimation of flux points, likelihood
profiles, and light curves is also supported. After describing the structure of
the package, we show, using publicly available -ray data, the
capabilities of Gammapy in multiple traditional and novel -ray analysis
scenarios, such as spectral and spectro-morphological modeling and estimations
of a spectral energy distribution and a light curve. Its flexibility and power
are displayed in a final multi-instrument example, where datasets from
different instruments, at different stages of data reduction, are
simultaneously fitted with an astrophysical flux model.Comment: 26 pages, 16 figure
Gamma-ray and radio properties of six pulsars detected by the fermi large area telescope
We report the detection of pulsed γ-rays for PSRs J0631+1036, J0659+1414, J0742-2822, J1420-6048, J1509-5850, and J1718-3825 using the Large Area Telescope on board the Fermi Gamma-ray Space Telescope (formerly known as GLAST). Although these six pulsars are diverse in terms of their spin parameters, they share an important feature: their γ-ray light curves are (at least given the current count statistics) single peaked. For two pulsars, there are hints for a double-peaked structure in the light curves. The shapes of the observed light curves of this group of pulsars are discussed in the light of models for which the emission originates from high up in the magnetosphere. The observed phases of the γ-ray light curves are, in general, consistent with those predicted by high-altitude models, although we speculate that the γ-ray emission of PSR J0659+1414, possibly featuring the softest spectrum of all Fermi pulsars coupled with a very low efficiency, arises from relatively low down in the magnetosphere. High-quality radio polarization data are available showing that all but one have a high degree of linear polarization. This allows us to place some constraints on the viewing geometry and aids the comparison of the γ-ray light curves with high-energy beam models