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Team Jodrell Findings

Our team at Jodrell conducted a thorough search for potential pulsar candidates and Radio Frequency Interference (RFI) to differentiate between them. We viewed 15 data sets at 350 MHz and analyzed some for the first time. Utilizing the GBT, we examined potential pulsar candidates at 820 MHz, leading to the discovery of a new binary pulsar near our candidates. We identified various RFI sources with specific period durations and discussed future analysis steps and questions for further investigations. Relevant

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Team Jodrell Findings

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  1. Team Jodrell Findings Paula Bright Connie Gartner Rachel Jennings Mike Mattox Jane Shamitko Jen VanDerMolen http://tinyurl.com/4xzhsoa

  2. Team Jodrell: tasks • Our task was to search for potential pulsar candidates, Radio Frequency Interference (RFI) and to distinguish between the two. • We did this by viewing 15 different data sets at 350 MHz (6 of which had never been viewed/analyzed before). Then we used the GBT to look at the potential pulsar candidates at 820 MHz. • We were able to look at a newly found binary pulsar due to its location being near our pulsar candidates.

  3. J1744-1610 GBT - 350 MHz Drift Scan

  4. Did you ever hear of drop average?

  5. GBT - 820 MHz Scan  J1744-1610 Ours was about .01 It should have 1x10-20 or smaller

  6. J1610-1322 at 350 MHz

  7. J1610-1322 at 820 MHz

  8. J1024+0039 350 MHz

  9. J1024+0039 at 820 Mhz

  10. Pulsar?

  11. RFI!

  12. RFI

  13. Periods of Known RFI Sources • 1198 ms signals power lines • 933 ms • 467 ms • 16.8 ms signals AC

  14. RFI: An Example of a 16.8 ms Period

  15. RFI: An Example of an 1198 ms Period

  16. What We Would Do Next Time if We Had More Time We would look at the pulsars at different frequencies to see what differences we would see across the frequencies. We would re-run the data for the pulsars that dropped the packets to see what information we could see for the  frequency of 820 MHz.

  17. Questions for Next Time Is there a way to take the RFI out of the data plots to see what is masked by the RFI? Could some of the RFI have been a software malfunction like we saw during our GBT time?

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