The Detectability of Gamma-Ray Bursts and Their Afterglows at Very High Redshifts

There is increasingly strong evidence that gamma-ray bursts (GRBs) are associated with star-forming galaxies, and occur near or in the star-forming regions of these galaxies. These associations provide indirect evidence that at least the long GRBs detected by BeppoSAX are a result of the collapse of massive stars. The recent evidence that the light curves and the spectra of the afterglows of GRB 970228 and GRB 980326 appear to contain a supernova component, in addition to a relativistic shock wave component, provide more direct clues that this is the case. Here we establish that GRBs and their afterglows are both detectable out to very high redshifts (z > 5).Comment: To appear in Proc. of the 10th Annual October Astrophysics Conference in Maryland: Cosmic Explosions, 4 pages, LaTe

Construction of the Variability -> Luminosity Estimator

We present a possible Cepheid-like luminosity estimator for the long-duration gamma-ray bursts based on the variability of their light curves.Comment: To appear in Procs. of Gamma-Ray Bursts in the Afterglow Era: 2nd Workshop, 3 pages, 2 figures, LaTe

Gamma-Ray Bursts as a Probe of Cosmology

We show that, if the long GRBs are produced by the collapse of massive stars, GRBs and their afterglows may provide a powerful probe of cosmology and the early universe.Comment: 6 pages, 5 PostScript figures. To appear in the proceedings of the October 2000 Rome Workshop on Gamma-Ray Bursts in the Afterglow Er

A Specter is Haunting the Financial Industry - The Specter of the Global Financial Crisis: A Comment on the Imminent Expansion of Consumer Financial Protection in the United States, the United Kingdom, and the European Union

This Comment explores the regulatory fallout from the global financial crisis. Across borders, policy makers are united in their conviction to reconcile the perceived failures of their predecessors to foresee and prevent the crisis, the effects of which show no signs of abating. A critical component of what caused the crisis was the inability to correct failures in the consumer credit market, specifically in subprime mortgages. Exacerbated by an influx of capital and a generally weak regulatory environment, this market failure manifested itself forcefully through a tidal wave of defaults in the American mortgage market that sent shock waves around the world. Unanimously, governments have responded with structural changes to their regulatory regimes with a renewed emphasis on consumer financial protection. While developments continue to be in flux, this comment explains how the structural changes, as currently understood, will usher in an unprecedented myriad of laws, rules, guidelines and regulations to be imposed on financial institutions around the globe

The GRB/SN Connection: An Improved Spectral Flux Distribution for the SN-Like Component to the Afterglow of GRB 970228, the Non-Detection of a SN-Like Component to the Afterglow of GRB 990510, and GRBs as Beacons to Locate SNe at Redshifts z = 4 - 5

We better determine the spectral flux distribution of the supernova candidate associated with GRB 970228 by modeling the spectral flux distribution of the host galaxy of this burst, fitting this model to measurements of the host galaxy, and using the fitted model to better subtract out the contribution of the host galaxy to measurements of the afterglow of this burst. Furthermore, we discuss why the non-detection of a SN1998bw-like component to the afterglow of GRB 990510 does not necessarily imply that a SN is not associated with this burst. Finally, we discuss how bursts can be used as beacons to locate SNe out to redshifts of z = 4 - 5.Comment: To appear in Proc. of the 5th Huntsville Gamma-Ray Burst Symposium, 5 pages, LaTe

The GRB/SN Connection: An Improved Spectral Flux Distribution for the Supernova Candidate Associated with GRB 970228

We better determine the spectral flux distribution of the supernova candidate associated with GRB 970228 by modeling the spectral flux distribution of the host galaxy of this burst, fitting this model to measurements of the host galaxy, and using the fitted model to better subtract out the contribution of the host galaxy to measurements of the afterglow of this burst.Comment: To appear in Proc. of the 10th Annual October Astrophysics Conference in Maryland: Cosmic Explosions, 4 pages, LaTe

Determining the Gamma-Ray Burst Rate as a Function of Redshift

We exploit the 14 gamma-ray bursts (GRBs) with known redshifts z and the 7 GRBs for which there are constraints on z to determine the GRB rate R_{GRB}(z), using a method based on Bayesian inference. We find that, despite the qualitative differences between the observed GRB rate and estimates of the SFR in the universe, current data are consistent with R_{GRB}(z) being proportional to the SFR.Comment: To appear in Procs. of Gamma-Ray Bursts in the Afterglow Era: 2nd Workshop, 3 pages, 3 figures, LaTe

Determining the GRB (Redshift, Luminosity)-Distribution Using Burst Variability

We use the possible Cepheid-like luminosity estimator for the long-duration gamma-ray bursts (GRBs) developed by Reichart et al. (2000) to estimate the intrinsic luminosity, and thus the redshift, of 907 long-duration GRBs from the BATSE 4B catalog. We describe a method based on Bayesian inference which allows us to infer the intrinsic GRB burst rate as a function of redshift for bursts with estimated intrinsic luminosities and redshifts. We apply this method to the above sample of long-duration GRBs, and present some preliminary results

Islandora and Fedora 4; The Atonement.

Open Repositories 2015In the context of repository platforms, Islandora has a fair bit of age, and with that a fair bit of cruft. In the early winter of 2014/2015 the Islandora community began working on a project plan to outline what would be needed in a version of Islandora that would work with of Fedora 4, and what resources would be needed to build it. This presentation will provide an overview of the project, as well as an in-depth technical overview and demonstration of the new functionality