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DESCRIPTIONTeam Parkes. PSC 2011. Introduction. - PowerPoint PPT Presentation
PSC 2011Team Parkes
Team Parkes folded the experiences and information imparted by PSC instructors, scientists, and mentors to establish a method of attacking the data most efficiently and to answer the question, Is it a pulsar or is it Memorex? Team Parkes members determined the most effective approach to analyze data sets. During this initial phase of the data analysis process, team members rated plots. When a plot scored two or higher, the entire team was assembled for input. Team Parkes studied the interesting plots making a final determination. Team members shared data sets to speed the process. Of all the data sets analyzed, five plots were flagged as worthy of further investigation.
Divide and ConquerEvery team member used Duncans Pulsar technique (or some form of it)
Duncs Rule of Thumb reduced x2 < 1 bad reduced x2 < 2 ( pulsar/RFI) reduced x2 > 3 (pulsar/RFI)
Image taken from : http://physics.wvu.edu/people/duncan_lorimer
The Man, the Myth, the Legend Duncan Lorimer
Recipe for Pulsars Time Domain Plot: Are there average pulses?
2. Integrated Pulse Profile: Do the pulses match the Time Domain Plot?
3. Sub-band Plot: Vertical or Horizontal line? (Vertical = possible pulsar, Horizontal = RFI)
4. DM curve: look for a peak > 0
5. Reduced x2 and Period Image taken from: http://tvtropes.org/pmwiki/pmwiki.php/Main/MadScientist
1. RA/Dec: 1854-0649
2. RA/Dec: 1947-1314
3. RA/Dec: 0049-0622
4. RA/Dec: 0123-0622(P = 0.97649487 ms)
5. RA/Dec: 0123-0622 (P =1.83759364 ms)
MemberRFICandidatesDas PoopTotal data setsJudy30387120David1505368Bonnie1705168Rick10290102Lee Ann1255269
To resize chart data range, drag lower right corner of range.
Pictures taken from Google images
versus dataImages from: http://www.purplecrying.info/userfiles/image/Baby%20in%20Crib.jpgand http://citydesk.freedomblogging.com/files/2011/02/grandpa-munster.jpg
Discussion PointsCertainSift through stuff to get to a possible candidate
GBT was working some of the time
Good potential candidates
Ton of noise
UncertainIf any of our candidates are pulsars
Data would have been gathered
When malfunction began during our scan
Causes other than RFI?
Questions do you havehmmm?Are the plots that we didnt get to run pulsars?
Will they/when will they be followed up? If so, we will be notified.
In the future, time permitting, we would run all of our candidates.
Image taken from: http://1.bp.blogspot.com/-4lN5WbxBz-w/TbImvNzYwDI/AAAAAAAAABQ/VgtE1zXvj4c/s1600/25917_yoda%255B1%255D.jpg
Parkes. the team that made the Kessel run in less than 12 parsecs Taken from: http://3.bp.blogspot.com/_3IjRgoGWUBo/TA14j1902WI/AAAAAAAAAl0/qaoCn-MRiCE/s1600/never-tell-me-the-odds-demotivator.jpg
Reduced x^2 greater than 1Make sure not a harmonic.Was listed in 350 drift scan survey but not ANTF catalog = known pulsarUnknown in either catalog, possible pulsar at this point pending conformation scan conducted last night DM 62ish, Signal Noise 12, 5 good circles on time-dm graphUnknown in either catalog, possible pulsar candidate, needs follow up due to GBT malfunction, DM 4.126, period - .97649696 ms, X^2 8.962, vertical bands at 0.6 and 1.6 in phase domain and corresponding banding in sub-band plot. Unknown in either catalog, possible pulsar candidate, needs follow up due to GBT malfunction, DM 4.126, period - .97649696 ms, X^2 8.962, vertical bands at 0.6 and 1.6 in phase domain and corresponding banding in sub-band plotUnknown in either catalog, possible pulsar candidate, needs follow up due to continuing GBT malfunction, DM 1.547, period .97649487 ms, X^2 4.939 vertical bands at 0.25 and 1.25 and corresponding banding in sub-band plotUnknown in either catalog, interesting plot related to previous example, needs follow up due to extended continuation of GBT malfunction, DM 29.065, period 1.83759364, X^2 2.242 Top left error bar larger than amplitude of peaks, DM 759, X^2 0.179Top Right Vertical band at DM of 22, 25, 42, and 45Bottom Left diagonal banding in sub-band plot, period of 33.35 = harmonic of 16.6 Bottom Right missing bins in phase-time diagram, DM 128.7, numerous horizontal bands in sub-band plot