Searching for pulsars in PALFA data from Arecibo

log in

Advanced search

Message boards : Science : Searching for pulsars in PALFA data from Arecibo

1 · 2 · 3 · 4 · Next
Author Message
Profile Bruce Allen
Volunteer moderator
Project administrator
Project developer
Project scientist
Avatar
Send message
Joined: 15 Oct 04
Posts: 1105
Credit: 171,768,817
RAC: 0
Message 92811 - Posted: 13 Dec 2008, 20:56:00 UTC
Last modified: 13 Dec 2008, 21:03:11 UTC

We are starting some limited public testing of a new pulsar search on Einstein@Home. This search uses data from the PALFA collaboration, taken at the Arecibo radio observatory. More information about this search will be released in the next few weeks; we'll use this thread (in the Science Message Board area) to provide updates when more information is available, and to answer questions.

Bugs and problems with the new application should be reported in this thread in the Bugs and Problem Reports Message Board area.
____________

ML1
Send message
Joined: 20 Feb 05
Posts: 331
Credit: 28,020,835
RAC: 18,174
Message 92816 - Posted: 13 Dec 2008, 22:13:51 UTC - in response to Message 92811.
Last modified: 13 Dec 2008, 22:47:50 UTC

... This search uses data from the PALFA collaboration, taken at the Arecibo radio observatory. ...

Thanks for the advanced notice.

Is this search using radio data?

And how does it tie in with the gravitational wave searches? Or is this search something separate?

Is there any overlap with the s@h Astropulse search?

Regards,
Martin

[edit]

For a partial answer to my questions, see: ALFA Pulsar Studies

[/edit]
____________
Powered by: Mageia5
See & try out your OS Freedom! Linux Voice
The Future is what We all make IT (GPLv3)
Profile Gerry Rough
Avatar
Send message
Joined: 1 Mar 05
Posts: 102
Credit: 1,847,066
RAC: 0
Message 92820 - Posted: 14 Dec 2008, 1:13:35 UTC - in response to Message 92816.

Is this search using radio data?

And how does it tie in with the gravitational wave searches? Or is this search something separate?

Is there any overlap with the s@h Astropulse search?


Yes, this will use radio data from Aricebo. There is a summary .PDF file here for more information. Scroll down to the last few pages for more direct info on the overlap with E@h. It does sound pretty interesting, actually. Good science for physics and space junkies who frequent this project

As to seti astropulse, no, there is no overlap. IIRC, the astropulse project is still looking for ET in just another way.

Seti on these boards is not a good subject to bring up: many consider it to be outside the bounds of serious scientific inquiry.
____________

(Click for detailed stats)
Profile tullio
Send message
Joined: 22 Jan 05
Posts: 1953
Credit: 2,987,754
RAC: 29,573
Message 92823 - Posted: 14 Dec 2008, 6:21:46 UTC
Last modified: 14 Dec 2008, 6:22:50 UTC

Without SETI there would not have been BOINC. Even IBM has converted its World Community Grid to BOINC. Only Folding@home is standing away from BOINC, but this is not surprising given the rivalry existing between Berkeley U.and Stanford U. Although I have a degree in theoretical physics I am not ashamed to contribute a part of my processing time to SETI in both MB and Astropulse versions. You can always learn something from Berkeley.
Tullio
____________

Richard Haselgrove
Send message
Joined: 10 Dec 05
Posts: 1724
Credit: 65,053,704
RAC: 59,201
Message 92832 - Posted: 14 Dec 2008, 12:11:37 UTC - in response to Message 92820.

As to seti astropulse, no, there is no overlap. IIRC, the astropulse project is still looking for ET in just another way.

UC Berkeley have prepared a technical paper on radio pulse searches, including Astropulse - intended for publication in Acta Astronautica. I hope you would take the time to at least glance at section 4 of http://setiathome.berkeley.edu/sah_papers/berkeley_pulse_search_paper_nov_2008.pdf - you may find that there is more in common with 'serious' pulsar searches than you at first thought.
ML1
Send message
Joined: 20 Feb 05
Posts: 331
Credit: 28,020,835
RAC: 18,174
Message 92843 - Posted: 14 Dec 2008, 22:48:41 UTC - in response to Message 92832.

As to seti astropulse, no, there is no overlap. IIRC, the astropulse project is still looking for ET in just another way.

UC Berkeley have prepared a technical paper on radio pulse searches, including Astropulse - intended for publication in Acta Astronautica. I hope you would take the time to at least glance at section 4 of http://setiathome.berkeley.edu/sah_papers/berkeley_pulse_search_paper_nov_2008.pdf - you may find that there is more in common with 'serious' pulsar searches than you at first thought.

I hope ancient 'rivalry' is not going to cloud the search...

What is it that e@h will be doing that is different or more comprehensive?

Keep searchin',
Martin


____________
Powered by: Mageia5
See & try out your OS Freedom! Linux Voice
The Future is what We all make IT (GPLv3)
ML1
Send message
Joined: 20 Feb 05
Posts: 331
Credit: 28,020,835
RAC: 18,174
Message 92844 - Posted: 14 Dec 2008, 22:51:13 UTC - in response to Message 92820.
Last modified: 14 Dec 2008, 22:51:49 UTC

... There is a summary .PDF file here for more information. ...


(Last slide: ) The Pulsar Timing Array looks rather interesting for gravitational wave detection!

Keep searchin',
Martin

(As mentioned over on s@h.)
____________
Powered by: Mageia5
See & try out your OS Freedom! Linux Voice
The Future is what We all make IT (GPLv3)
Profile Mike Hewson
Volunteer moderator
Avatar
Send message
Joined: 1 Dec 05
Posts: 5092
Credit: 41,761,438
RAC: 9,162
Message 92845 - Posted: 14 Dec 2008, 23:23:27 UTC - in response to Message 92820.
Last modified: 15 Dec 2008, 4:38:29 UTC

Seti on these boards is not a good subject to bring up: many consider it to be outside the bounds of serious scientific inquiry.

I'd reckon it quite legitimate to discuss the science here despite how 'serious', or not, people think it is. I'm not aware of any negatives on the science of SETI, though perhaps some might confuse/confound the science with the social/philosophical/religious etc issues.

Of course we have SETI to thank for the whole distributed computing thrust in recent times, and there is considerable commonality with E@H in particular - needle in the haystack stuff.

I reckon it's a brilliant move to 'fold in' other targets of enquiry. It enhances the science value obtained from the volunteer base, and hopefully enthuses the crunchers too!! With fiscal issues more prominent these days, and likely science funding particularly, it looks to be a pragmatic way to achieve some hefty intellectual goals. :-)

Cheers, Mike.
____________
"I have made this letter longer than usual, because I lack the time to make it short." - Blaise Pascal
Profile Bikeman (Heinz-Bernd Eggenstein)
Volunteer moderator
Project administrator
Project developer
Avatar
Send message
Joined: 28 Aug 06
Posts: 3502
Credit: 149,313,743
RAC: 91,207
Message 92847 - Posted: 15 Dec 2008, 2:19:07 UTC

Hi!

AFAIK, the use of pulsars as "arms" of a GW detector of monumental size is by far not the only motivation for this search. The E@H search explicitly targets pulsars in binary systems, which have been used in the past to test many predictions of general relativity.

CU
Bikeman
____________

Profile tullio
Send message
Joined: 22 Jan 05
Posts: 1953
Credit: 2,987,754
RAC: 29,573
Message 92853 - Posted: 15 Dec 2008, 9:13:30 UTC

Astropulse has had its teething troubles but now it seems OK. I have restarted it on my SETI account. The paper referred to by Richard Haselgrove can be found also on the SETI home page.
Tullio
____________

stewjack
Send message
Joined: 4 Mar 06
Posts: 17
Credit: 1,168,109
RAC: 0
Message 92904 - Posted: 17 Dec 2008, 2:17:44 UTC

One thing I always like liked about SETI was it's graphics. I believe it had a graphical representation of "fast Fourier transform" analysis of radio signals.

I wonder if your pulsar search uses fast Fourier transforms, and if the SETI screensaver is open source? hint hint

I tend to get bored by the abstract activities of crunching WU's. Intellectually I have a general understanding of what I am doing. However; I find an active graphic that provides immediate direct knowledge of the work my computer is doing - to be emotionally satisfying.

Every once in a while; watching an animated graphic that demonstrates my computer doing useful work, even if I happen to be taking a break, is a pleasant experience. I have found that I tend to stick with projects that have such graphics. However; there is always an exception, and for me it was SETI!!


Profile Bikeman (Heinz-Bernd Eggenstein)
Volunteer moderator
Project administrator
Project developer
Avatar
Send message
Joined: 28 Aug 06
Posts: 3502
Credit: 149,313,743
RAC: 91,207
Message 92905 - Posted: 17 Dec 2008, 7:11:08 UTC

There is a thread in the Cruncher's Corner section about writing your own screensaver for Einstein@Home (afaik nobody has yet actually done an alternative screensaver/graphics window for E@H). I'm sure once the pulsar search is in "production", Bernd will be happy to release the source code for the pulsar search screensaver as well.

CU
Bikeman
____________

stewjack
Send message
Joined: 4 Mar 06
Posts: 17
Credit: 1,168,109
RAC: 0
Message 92985 - Posted: 19 Dec 2008, 16:25:46 UTC - in response to Message 92905.

There is a thread in the Cruncher's Corner section about writing your own screensaver for Einstein@Home


I am not a programmer. I did write some short programs in Basic - back when I had a Radio Shack color computer that used a cassette tape recorder as long term storage. Long long time ago!

I did learn to use TopCatLite v3.1 to create gifs showing multiple WU's. I will try and place those on a more appropriate thread.

HERE
Mats Nilsson
Send message
Joined: 10 Dec 05
Posts: 94
Credit: 8,965,865
RAC: 5,661
Message 93087 - Posted: 23 Dec 2008, 19:36:00 UTC

Is there a way for us that is using app_info to run beta 6.10 for win to get the files to run both. I´m wondering because I saw the files listed in current version section (3.02 for win).

Profile Bernd Machenschalk
Volunteer moderator
Project administrator
Project developer
Avatar
Send message
Joined: 15 Oct 04
Posts: 3612
Credit: 128,593,133
RAC: 53,656
Message 93132 - Posted: 25 Dec 2008, 9:43:17 UTC - in response to Message 93087.

Is there a way for us that is using app_info to run beta 6.10 for win to get the files to run both. I´m wondering because I saw the files listed in current version section (3.02 for win).

You could manually download the einsteinbinary_ABP1_3.02* files from http://einstein.phys.uwm.edu/download/ and add a section for app einsteinbinary_ABP1 to the app_info.xml. However I doubt that this would make much sense right now as we are not issuing any ABP1 work in the next weeks and furthermore you'd miss updates to the einsteinbinary application.

Better help us test the 6.10 Windows Beta App so we can make it official and then switch back to the "official" path.

BM
Mats Nilsson
Send message
Joined: 10 Dec 05
Posts: 94
Credit: 8,965,865
RAC: 5,661
Message 93171 - Posted: 26 Dec 2008, 12:35:19 UTC - in response to Message 93132.

Is there a way for us that is using app_info to run beta 6.10 for win to get the files to run both. I´m wondering because I saw the files listed in current version section (3.02 for win).

You could manually download the einsteinbinary_ABP1_3.02* files from http://einstein.phys.uwm.edu/download/ and add a section for app einsteinbinary_ABP1 to the app_info.xml. However I doubt that this would make much sense right now as we are not issuing any ABP1 work in the next weeks and furthermore you'd miss updates to the einsteinbinary application.

Better help us test the 6.10 Windows Beta App so we can make it official and then switch back to the "official" path.

BM


Ok have downloaded them just in case I should need them. I´m allready running beta 6.10 so I have to keep track of update myself.
Profile Es99
Avatar
Send message
Joined: 9 Sep 05
Posts: 803
Credit: 387,127
RAC: 0
Message 94883 - Posted: 15 Feb 2009, 10:32:03 UTC - in response to Message 92845.

Seti on these boards is not a good subject to bring up: many consider it to be outside the bounds of serious scientific inquiry.

I'd reckon it quite legitimate to discuss the science here despite how 'serious', or not, people think it is. I'm not aware of any negatives on the science of SETI, though perhaps some might confuse/confound the science with the social/philosophical/religious etc issues.

Of course we have SETI to thank for the whole distributed computing thrust in recent times, and there is considerable commonality with E@H in particular - needle in the haystack stuff.

I reckon it's a brilliant move to 'fold in' other targets of enquiry. It enhances the science value obtained from the volunteer base, and hopefully enthuses the crunchers too!! With fiscal issues more prominent these days, and likely science funding particularly, it looks to be a pragmatic way to achieve some hefty intellectual goals. :-)

Cheers, Mike.

Perhaps the idea will be to eventually have just one Boinc project where you check boxes to say what sort of WUs you'd like to work on. It would make it easier to keep up with what is out there. I've missed some projects that I found interesting simply because there are so many out there now.

Of course Einstein always has and always will be my favourite.
____________
Physics is for gurls!
ML1
Send message
Joined: 20 Feb 05
Posts: 331
Credit: 28,020,835
RAC: 18,174
Message 94893 - Posted: 15 Feb 2009, 17:53:57 UTC - in response to Message 94883.

Perhaps the idea will be to eventually have just one Boinc project where you check boxes to say what sort of WUs you'd like to work on. It would make it easier to keep up with what is out there...

Isn't that what we've already got with the two account managers?

BAM and GridRepublic?

Happy crunchin',
Martin

____________
Powered by: Mageia5
See & try out your OS Freedom! Linux Voice
The Future is what We all make IT (GPLv3)
Profile Bikeman (Heinz-Bernd Eggenstein)
Volunteer moderator
Project administrator
Project developer
Avatar
Send message
Joined: 28 Aug 06
Posts: 3502
Credit: 149,313,743
RAC: 91,207
Message 95436 - Posted: 8 Mar 2009, 12:59:02 UTC
Last modified: 8 Mar 2009, 12:59:13 UTC

For those with some physics background, there's a nice poster explaining some details about the planned search here

Bikeman
____________

Filipe
Send message
Joined: 10 Mar 05
Posts: 134
Credit: 45,584,530
RAC: 22,345
Message 96658 - Posted: 29 Apr 2009, 21:15:19 UTC

Any chance to have an estimated % of work completed and work still remaining for the PALFA search, like we have for the S5R5 search on the einstein status page?
____________

1 · 2 · 3 · 4 · Next

Message boards : Science : Searching for pulsars in PALFA data from Arecibo


Home · Your account · Message boards

This material is based upon work supported by the National Science Foundation (NSF) under Grants PHY-1104902, PHY-1104617 and PHY-1105572 and by the Max Planck Gesellschaft (MPG). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the investigators and do not necessarily reflect the views of the NSF or the MPG.

Copyright © 2016 Bruce Allen