6 papers
New Panoramic View of CO and 1.1 mm Continuum Emission in the Orion A Molecular Cloud. I. Survey Overview and Possible External Triggers of Star Formation
Yoshito Shimajiri, Ryohei Kawabe, Shigehisa Takakuwa +17
We present new, wide and deep images in the 1.1 mm continuum and the CO (=1-0) emission toward the northern part of the Orion A Giant Molecular Cloud (Orion-A GMC). The 1…
Resonant Cyclotron Radiation Transfer Model Fits to Spectra from Gamma-Ray Burst GRB870303
P. E. Freeman, D. Q. Lamb, J. C. L. Wang +5
We demonstrate that models of resonant cyclotron radiation transfer in a strong field (i.e. cyclotron scattering) can account for spectral lines seen at two epochs, denoted S1 and…
Statistical Analysis of Spectral Line Candidates in Gamma-Ray Burst GRB870303
P. E. Freeman, C. Graziani, D. Q. Lamb +4
The Ginga data for the gamma-ray burst GRB870303 exhibit low-energy dips in two temporally distinct spectra, denoted S1 and S2. S1, spanning 4 s, exhibits a single line candidate a…
ASCA Discovery of an X-ray Pulsar in the Error Box of SGR1900+14
K. Hurley, P. Li, C. Kouveliotou +9
We present a 2 - 10 keV ASCA observation of the field around the soft gamma repeater SGR1900+14. One quiescent X-ray source was detected in this observation, and it was in the SGR…
Gamma-Ray Burst and Relativistic Shells: The Surface Filling Factor
E. E. Fenimore, C. Cooper, E. Ramirez-Ruiz +3
The variability observed in many complex gamma-ray bursts (GRBs) is inconsistent with causally connected variations in a single, symmetric, relativistic shell interacting with the…
X-ray Spectral Characteristics of Ginga Gamma-Ray Bursts
T. E. Strohmayer, E. E. Fenimore, T. Murakami +1
The proportional counter and scintillator on Ginga provided unprecented spectral coverage of GRBs, from 2 - 400 keV. Below 20 keV we find evidence for a positive spectral number in…