The ATLAS-SPT Radio Survey of Cluster Galaxies

Using a high-performance computing cluster to mosaic 4,787 pointings, we have imaged the 100 sq. deg. South Pole Telescope (SPT) deep-field at 2.1 GHz using the Australian Telescope Compact Array to an rms of 80 $\mu$Jy and a resolution of 8". Our goal is to generate an independent sample of radio-selected galaxy clusters to study how the radio properties compare with cluster properties at other wavelengths, over a wide range of redshifts in order to construct a timeline of their evolution out to $z \sim 1.3$. A preliminary analysis of the source catalogue suggests there is no spatial correlation between the clusters identified in the SPT-SZ catalogue and our wide-angle tail galaxies.Comment: 9 pages, 4 figures. Submitted to Proceedings of Science for "The many facets of extragalactic radio surveys: towards new scientific challenges", Bologna, Italy 20-23 October 2015 (EXTRA-RADSUR2015

A wider audience: Turning VLBI into a survey instrument

Radio observations using the Very Long Baseline Interferometry (VLBI) technique typically have fields of view of only a few arcseconds, due to the computational problems inherent in imaging larger fields. Furthermore, sensitivity limitations restrict observations to very compact and bright objects, which are few and far between on the sky. Thus, while most branches of observational astronomy can carry out sensitive, wide-field surveys, VLBI observations are limited to targeted observations of carefully selected objects. However, recent advances in technology have made it possible to carry out the computations required to target hundreds of sources simultaneously. Furthermore, sensitivity upgrades have dramatically increased the number of objects accessible to VLBI observations. The combination of these two developments have enhanced the survey capabilities of VLBI observations such that it is now possible to observe (almost) any point in the sky with milli-arcsecond resolution. In this talk I review the development of wide-field VLBI, which has made significant progress over the last three years.Comment: Invited review at the General Assembly of the Astronomische Gesellschaf

Request for Proposal: Automated Data Processing Equipment and Software for McCook, Nebraska

This Request for Proposal (RFP) is submitted to solicit proposals from qualified vendors for computer hardware, software and support for the city of McCook, Nebraska. In order to receive consideration, a proposed system must meet the requirements of the city of McCook as herein described

Data Processing Analysis and Recommendations for the Ashland-Greenwood Public Schools Ashland, NE

This report presents an analysis with recommendations regarding the administrative data processing needs of the Ashland-Greenwood Public Schools in Ashland, Nebraska. The analysis was undertaken pursuant to a letter of March 11, 1983 from the Center for Applied Urban Research of the University of Nebraska at Omaha to the school superintendent

Computers and Small Local Governments: A Survey of Computer in the Plains and Mountain States

In July, 1982 the Center for Applied Urban Research (CAUR) of the University of Nebraska at Omaha was awarded a grant from the W. K. Kellogg Foundation to develop and test a training and technical assistance program to help small and rural local governments acquire and use microcomputer technology. This effort contains two major parts: 1) demonstrations of prototype methods in one or more Nebraska local governments that they can use to acquire microcomputer systems, and 2) development of training programs, training materials, and a film on microcomputers for local government officials

Data Processing Analysis and Recommendations for Butler County, NE

This report presents an analysis with recommendations regarding the data processing needs of Butler County, Nebraska. It was undertaken pursuant to a letter of March 11, 1983 from the Center for Applied Urban Research of the University of Nebraska at Omaha to the Butler County Board of Supervisors

Data Processing Analysis and Recommendations for the City of McCook, Nebraska

This report is an analysis with recommendations regarding the data processing needs of the city of McCook, Nebraska. If was undertaken pursuant to an agreement dated February 22, 1982 between McCook and the Center for Applied Urban Research of the University of Nebraska at Omaha. It will provide city officials in McCook with a basis upon which to decide whether to expand and upgrade current automated data processing capabilities

Market Potential for Automated Data Processing Services in Southeast Nebraska

This report presents an analysis of computing among local governmental agencies in southeastern Nebraska. The data were collected via telephone interviews with 219 agencies during December, 1983. The study was conducted for the City of Lincoln Data Processing Department to assist in determining whether a market potential among local governments exists for its services

GRB Spikes Could Resolve Stars

GRBs vary more rapidly than any other known cosmological phenomena. The lower limits of this variability have not yet been explored. Improvements in detectors would reveal or limit the actual rate of short GRBs. Were microsecond "spike" GRBs to exist and be detectable, they would time-resolve stellar mass objects throughout the universe by their gravitational microlensing effect. Analyzing the time structure of sufficient numbers of GRB spikes would reveal or limit $\Omega_{star}$, $\Omega_{MACHO}$, and/or $\Omega_{baryon}$.Comment: 18 pages, 2 figures, in press: ApJ (Letters