131 Computation, Data Handling, Image Analysis Poster Session America Ballroom Foyer
131.01
Detecting Cosmic Rays in Infrared Data
Rachel E. Anderson1, K. D. Gordon1
1STScI.
8:00 AM - 7:00 PM
America Ballroom Foyer
Cosmic rays are a known problem in infrared astronomy, causing both loss of data and data accuracy. The problem becomes even more extreme when considering data from a high radiation environment such as in orbit around Earth, or outside the Earth’s magnetic field altogether, unprotected, as is the case for the James Webb Space Telescope. To find the best method to correct for this disturbance we study three cosmic ray detection methods: a 2-point difference method, a deviation from the fit method, and a y-intercept method. These methods are applied to simulated non-destructive read ramps with various slopes, number of frames, number of cosmic rays, and cosmic ray frame number and strength. We show that the 2-point difference method is the fastest, optimal detection method in the photon-dominated regime and the y-intercept method is the optimal detection method in the read noise-dominated regime.
131.02
Full-text Indexing Of All Springer Astronomy And Physics Journals In The ADS
Guenther Eichhorn1, H. Blom1, A. Accomazzi2
1Springer, 2Smithsonian Astrophysical Observatory.
8:00 AM - 7:00 PM
America Ballroom Foyer
Springer, as a publisher of scientific and technical literature, has been collaborating with the ADS since the very beginning of the ADS Abstract Service. Once of the culminations of this collaboration was the scanning of all back issues of Solar Physics. We are now in the process of enabling full text searching of all Springer journals in Astronomy and Physics through the ADS. This agreement between Springer and the ADS will be based on a similar agreement between Springer and INSPIRE. That agreement allows full text searching of Springer High Energy Physics journals in SPIRES and its successor INSPIRE, a database of the High Energy Physics literature developed and managed by a collaboration between CERN, DESY, Fermilab, and SLAC. Springer will provide the full text of all the Astronomy and Physics journals to the ADS for indexing. Display of search results will include snippets of text that includes the search terms, to allow the user to immediately see the context of the searched terms in the articles. Such a full text search will allow greatly enhanced search functionality and should allow much more detailed and in-depth searches of the relevant literature at Springer, one of the largest publishers of scientific-technical literature. We are currently in the process to determine whether this full text search capability can be extended to scientific books as well.
131.03
Exploring Sound to Convey Information
Wanda Liz Diaz-Merced1, M. Schneps2, N. Brickhouse3, M. Pomplun4, S. Brewster1, J. Mannone1
1University of Glasgow, United Kingdom, 2Smithsonian Center for Astrophysics Science Media Group, 3Smithsonian Center for Astrophysics, 4University of Massachusetts.
8:00 AM - 7:00 PM
America Ballroom Foyer
In this poster we present sonification (the use of sound to convey information) techniques with an example applied to X-ray astronomy. We also present preliminary results of perception experiments. Using sonification we have identified frequencies in the Chandra X-Ray observations of EX Hya, a cataclysmic variable of the intermediate polar type. The frequencies corresponding to 2.44 and 28.3 mHz may be quasi-periodic oscillations characteristic of the source while those identified at 126, 258 and 386 mHz appear to be an instrumental effect. We have conducted perception experiments on 13 participants exposed to visual stimuli, auditory stimuli and visual and auditory stimuli together. The subjects were asked to identify signals in the presence of noise. They showed performance improvement when auditory stimuli were added to a visual display. The difference in performance between "sound only" and "visual graph only" is about 20 times larger. This may support the use of sound as an adjunct to data visualization in astronomy data analysis, especially when proper training is given to the users. The authors acknowledge the Smithsonian Institution Women Committee for sponsoring this research.
131.04
The Indra Simulation Database
Bridget Falck1, T. Budavari1, S. Cole2, D. Crankshaw1, L. Dobos3, G. Lemson4, M. Neyrinck1, A. Szalay1, J. Wang2
1Johns Hopkins University, 2University of Durham, United Kingdom, 3Eotvos Lorand University, Hungary, 4Max-Planck Institute for Astrophysics, Germany.
8:00 AM - 7:00 PM
America Ballroom Foyer
We present the Indra suite of cosmological N-body simulations and the design of its companion database. Indra consists of 512 different instances of a 1 Gpc/h-sided box, each with 100 million dark matter particles and the same input cosmology, enabling a characterization of very large-scale modes of the matter power spectrum with galaxy-scale mass resolution and an excellent handle on cosmic variance. Each simulation outputs 64 snapshots, giving over 100 TB of data for the full set of simulations, all of which will be loaded into a SQL database. We discuss the database design for the particle data, consisting of the positions and velocities of each particle; the FOF halos, with links to the particle data so that halo properties can be calculated within the database; and the density field on a power-of-two grid, which can be easily linked to each particle’s Peano-Hilbert index. Initial performance tests and example queries will be given.
The authors are grateful for support from the Gordon and Betty Moore and the W.M. Keck Foundations.
131.05
Introducing ADS Labs
Alberto Accomazzi1, E. Henneken1, C. S. Grant1, M. J. Kurtz1, G. Di Milia1, J. Luker1, D. M. Thompson1, E. Bohlen1, S. S. Murray1
1Harvard Smithsonian Center for Astrophysics.
8:00 AM - 7:00 PM
America Ballroom Foyer
ADS Labs is a platform that ADS is introducing in order to test and receive feedback from the community on new technologies and prototype services. Currently, ADS Labs features a new interface for abstract searches, faceted filtering of results, visualization of co-authorship networks, article-level recommendations, and a full-text search service.
The streamlined abstract search interface provides a simple, one-box search with options for ranking results based on a paper relevancy, freshness, number of citations, and downloads. In addition, it provides advanced rankings based on collaborative filtering techniques.
The faceted filtering interface allows users to narrow search results based on a particular property or set of properties (“facets”), allowing users to manage large lists and explore the relationship between them.
For any set or sub-set of records, the co-authorship network can be visualized in an interactive way, offering a view of the distribution of contributors and their inter-relationships. This provides an immediate way to detect groups and collaborations involved in a particular research field.
For a majority of papers in Astronomy, our new interface will provide a list of related articles of potential interest. The recommendations are based on a number of factors, including text similarity, citations, and co-readership information.
The new full-text search interface allows users to find all instances of particular words or phrases in the body of the articles in our full-text archive. This includes all of the scanned literature in ADS as well as a select portion of the current astronomical literature, including ApJ, ApJS, AJ, MNRAS, PASP, A&A, and soon additional content from Springer journals. Fulltext search results include a list of the matching papers as well as a list of “snippets” of text highlighting the context in which the search terms were found. ADS Labs is available at http://adslabs.org.
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