GBT Pulsar Observations

Details GBT Pulsar Observations GBT Pulsar Observations

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20718307m&link_type=abstract

American Astronomical Society Meeting 207, #183.07; Bulletin of the American Astronomical Society, Vol. 37, p.1469

Astronomy and Astrophysics

Astronomy

Scientific paper

Searching for binary pulsars is a relatively new science due to the development of computing technology allowing astronomers to implement complex algorithms that reduce and analyze data. One such algorithm creates a Dynamic Power Spectrum, yielding an extremely large matrix where binary millisecond pulsar (MSP) signals are represented as (typically) sinusoidal curves. These curves are often discontinuous and have very low signal-to-noise. The crux of the DPS algorithm is to automatically identify these curves while keeping the number of false positives low, all using a reasonable amount of computing time. We describe two independent methods for searching data sets from the Green Bank Telescope (GBT) for MSP signals. One of these methods has already uncovered a previously unknown MSP in the globular cluster Terzan 5. This new binary pulsar, Ter5AE, is 3.65ms pulsar in a 4.1 hour orbit with an approximately 20 Jupiter mass companion. The DPS method, used to find Ter5AE, shows strong potential for additional future discoveries.

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