1 / 1

M. W. Castelaz,T. Barker, J. D. Cline, W. Bedell, L. Owen Pisgah Astronomical Research Institute

Citizen Science Project. The public is invited to participate in a distributed computing online environment to classify the stars from objective prism plates. Not-for-profit foundation. www.pari.edu. M. W. Castelaz,T. Barker, J. D. Cline, W. Bedell, L. Owen

holland
Download Presentation

M. W. Castelaz,T. Barker, J. D. Cline, W. Bedell, L. Owen Pisgah Astronomical Research Institute

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Citizen Science Project The public is invited to participate in a distributed computing online environment to classify the stars from objective prism plates. Not-for-profit foundation www.pari.edu M. W. Castelaz,T. Barker, J. D. Cline, W. Bedell, L. Owen Pisgah Astronomical Research Institute http://scope.pari.edu Use SCOPE in Astronomy Labs! American Astronomical Society 213th MeetingSession 464.11 Education Public Outreach. Wednesday, January 7, 2009 The Objective Prism Plates Currently in Beta-Mode: Testing the Reliability of Spectral Classifications The Webpage Pre-processing Main SCOPE website with pages for the Science, How to Take Part in SCOPE, Classify Stars, FAQs, and Feedback. • Three steps before making the spectra public: • Split a full plate scan into four panels • Each panel is 1 MB to load online at a reasonable speed. • 2. Pre-selected stars are made public by identifying and marking HD and BD stars for classification. • 3. Activate the plate panels for online use. The Michigan Objective Prism Blue Survey (e.g. Sowell et al. 2007, AJ, 134, 1089) plates located in the Astronomical Photographic Data Archive at the Pisgah Astronomical Research Institute hold hundreds of thousands of stellar spectra, many of which have not been classified before. Plates are being scanned and stellar spectra made available for classification online. • Initially, all stars accessible to the public are HD or BD stars with published spectral types. • Each classification of a star will be compared to the published value to build a histogram of differences. • All classifications for a star will be averaged and standard deviation calculated. • Comparisons to published values will form a baseline for future classifications of stars with unknown spectral type. • The average will be used in the final classification of unknowns. Login and select a plate. Stars ready for classifying on the chosen plate are outlined in blue boxes. Selected star is outlined by a yellow box and ported to a new screen for first level of classification by comparing to standard spectra. N Standard spectral types are from the Library of Stellar Spectra by Jacoby, Hunter, and Christian (1984, ApJS, 56, 278). Their plots were re-formatted into images. A total of 119 spectral types are available and used. E After the first level of classification, a subclass can be chosen again by comparison to standard spectra. When done, the user is prompted to classify another star. Plate CTIO-6099. Located at 12h 54m and -10O. A 20 minute exposure taken March 8, 1970

More Related