Prototype Tool for Interaction with Large Spectral Line GBT Data Sets

Details Prototype Tool for Interaction with Large Spectral Line GBT Data Sets Prototype Tool for Interaction with Large Spectral Line GBT Data Sets

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21361206m&link_type=abstract

American Astronomical Society, AAS Meeting #213, #612.06

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Scientific paper

The Green Bank Telescope is often used for collecting large amounts of data. The software that is currently used for data analysis -GBTIDL- unfortunately displays one spectrum at a time. Under the supervision of Bob Garwood, I created a prototype tool that would make the analysis of large spectral line GBT data sets more efficient. The new program, GBTV, instead displays a 2D plot (or image) in which signal intensity is plotted as color intensity. The image is built such that the record number is on one axis, while the channel is on the other. We already have implemented ways to interact with the plot directly (e.g. flag chunks of data), yet the GBTV interface allows for much flexibility. Furthermore, since the number of channels always exceeds the number of pixels on the screen, we integrated a separate routine so that it does not zoom out on an image in a classical manner; instead, each pixel in the new image is a regional maximum of the original. This was done in order to facilitate the detection of weak signals or possible RFI. Currently, the new software can work well as an accessory for GBTIDL. Further work can be done so as to integrate more features, that would make it possible for GBTV to become a standalone data analysis software.

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