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168 records were found.

Comment: very strongly revised analysis of GRB971214 and discussion, submitted to ApJ, 11 pages LaTeX, 4 figures, uses emulateapj.sty (included)
Comment: 11 pages, 5 figures. Revised edition removes references to unphysical chromatic break and adds appendix on hot region directly behind shock
Comment: conference proceedings 6th Huntsville symposium, 20-23 October 2008. Editors: C.A. Meegan, N. Gehrels, and C. Kouveliotou
Comment: 23 pages, 4 figures, AAS LaTeX macros v5.0, Submitted to the Astrophysical Journal
Recently observed emission lines in the X-ray afterglow of gamma ray bursts suggest that iron group elements are either produced in the gamma ray burst, or are present nearby. If this material is the product of a thermonuclear burn, then such material would be expected to be rich in Nickel-56. If the nickel remains partially ionized, this prevents the electron capture reaction normally associated with the decay of Nickel-56, dramatically increasing the decay timescale. Here we examine the consequences of rapid ejection of a fraction of a solar mass of iron group material from the center of a collapsar/hypernova. The exact rate of decay then depends on the details of the ionization and therefore the ejection process. Future observations of iron, nickel and cobalt lines can be used to diagnose the origin of these elements and to better...
Comment: 6 pages when LaTex'ed, with 5 figures included Accepted to MNRAS; replaced version contains psfigure.tex file, since psfig.tex was causing problems (no changes in the text or figures of the paper)
Comment: submitted to New Astronomy, for the David N. Schramm memorial volume, 14 pages LaTeX, no figures, minor changes
Comment: Revised version, original subm to Ap.J. 9/26/97, latex file (uses aaspp4), 17 pages. The qualitative behavior remains the same, Eqs. 8, 14, 15 have corrected exponents, Tables 1 and 2 are partially rewritten, discussion partially updated
Comment: 6 pages including 3 figures, accepted to MNRAS after revisions
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