team parkes

PSC 2011Team Parkes

Introduction

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)

Data Distribution

MemberRFICandidatesDas PoopTotal data setsJudy30387120David1505368Bonnie1705168Rick10290102Lee Ann1255269

Total8410333427

Chart1

1.87

78.4

19.67

19.67%

2.34%

78.21%

Data Distribution

Sheet1

Data Distribution

Candidates1.87

Das Poop78.4

RFI19.67

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

undetermined

Discussion PointsCertainSift through stuff to get to a possible candidate

GBT malfunctioned

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

Confirmation

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