Arecibo binary pulsar (re)discoveries page updated
Submitted on 27 Aug 2010 13:40:17 UTC
The latest radio pulsar (re)discoveries are available at the usual place. Our count is now at 2 observations of 1 NEW pulsar, 242 detections of 123 different known radio pulsars, including 20 re-observations of 8 different milli-second pulsars. Thank you very much volunteers!
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Arecibo binary pulsar (re)discoveries page updated
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This is my first time with the program but corect me if iam wrong the bulls eye bliked about three times is that unusual is it e new discovery?
Hi and welcome to
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Hi and welcome to Einstein@Home!
I suppose you are asking about the screensaver, right? The "crosshair" is a search marker. It shows the current position the search application is analyzing on your machine at a given point in time. More details can be found here.
Cheers,
Oliver
Einstein@Home Project
If I understand the PALFA
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If I understand the PALFA webpage correctly your project is in line to double the number of new pulsars found this year, is that correct? Do you have some idea when PSR J2007+2722 will be added to the PALFA page? Will the other candidate be confirmed/announced/added this year?
Quite a feather in the Einstein@Home's cap to equal the entire observational community.
Edit: Ah, I see that the PALFA page is only Arecibo discoveries, is there a web page of all pulsar discoveries?
Things have been a bit quiet
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Things have been a bit quiet lately ... any news? Not necessarily on this, but I would imagine a few more (re)discoveries have been made in the last oh, 33 days :)
At the current rate we have about (45695*100/67.1 - 45695)/(309 - 49) = 86 days of ABP2 data left before we catch up!
Yep, and before it we still
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Yep, and before it we still will have to go back to the central region of the galaxy (working on anticenter atm) thinks about 50 days?
Hmm. S5GC1 completed its work about the same time (~ 70-72 days) too.
I think the developers will be "hot" period in late November - early December :)
I think the developers will
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I think the developers will be "hot" period in late November - early December
What does that mean in non-tech words please :)
Cheers
Dee
xx
RE: I think the developers
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The most problems with the project occur when a search comes to an end and a new search starts. On the status page you can see the S5GC1 search progress. Right now there are 70 days left and you can calculate the time untill the ABP search progress will reach 100%. Which is around 90 days from now.
The ABP search won´t stop, but only 1/6 of the data will be available.
Will the list become updated
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Will the list become updated at the end of this project?
I believe, this was´nt done for so long time, because there have been nearly no rediscoveries, as we are looking now in the anticenter direction, there are much less candidates. This is because the density of stars is much less and they are in the mean much younger than towards the center of our galaxy. Except we could look towards a neighbour galaxy like Andromeda or the Magelanians. But I don´t know whether these are within the reach of apperture of arecibo.
Kind regards
Martin
At its final stage the
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At its final stage the "post-processing" of the Einstein@home results still requires manual inspection to find pulsars and map them to the known ones. The main reason for the rediscovery page not being updated is that the people responsible for it have been away from their desks for a few weeks. I'd expect the next update for next week. Oh and yes, pulsars are much rarer in the "anti-center" direction.
BM
BM
Anything new about the
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Anything new about the update?
RE: Anything new about the
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Do I hear an echo?
Thanks!
But are we looking for
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But are we looking for Arecibo pulsars or Parkes pulsars? The diagram on the upper right is called Arecibo Power Spectrum but the declination is about -60. I am not an astronomer, but I believe we are looking at the southern sky.
Tullio
RE: But are we looking for
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Arecibo feed is down currently. We're getting data from Parkes.
Seti Classic Final Total: 11446 WU.
I am getting a very strong
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I am getting a very strong signal on the Power Spectrum bin 1. It must be interference. Is it near Parkes? Arecibo has very strong radars nearby.
Tullio
RE: I am getting a very
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A strong signal at the lowest harmonics could also be a (boring) long period pulsar that is likely already known. The (re)discoveries page is loaded with them, and the likelihood of seeing one in an individual Parkes data run is somewhat higher since the beam is roughly a factor of 5 larger in area (the Parkes dish is less than half the effective diameter of Arecibo). A lot of the Parkes pointings historically have been directed at dense things like globular clusters that can have up to a dozen pulsars in them. I'm not sure about this specific Parkes run (it could be a more general search of the galactic plane). A recent paper described the discovery of a millisecond pulsar in a long duration pointing at various gamma ray sources from the new satellite observatory (Fermi). Eventually they want to process that data with E@H (the initial search used simpler schemes that tend miss short period binaries), but they'll have to massage the code a bit to deal with very long data sets (finer orbital grid, file size issues, etc.). Sometimes you get lucky anyway, since one of the pulsars they found is in a 3 hour binary orbit about a very low mass companion. The pulsar was strong enough (4 mJy @ 1400 MHz), and the orbital motion small enough (projected semi-major axis only 26 milliseconds or 10 pulse periods), that they saw the pulsar signal anyway.
"Better is the enemy of the good." - Voltaire (should be memorized by every requirements lead)
RE: I'm not sure about this
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The data set we are using is the Parkes Multibeam Pulsar Survey (PMPS). You can find information about it here.
Director, Einstein@Home