Editing Einstein@Home (section)

== Radio data analysis and results ==
On 24 March 2009, it was announced that the Einstein@Home project was beginning to analyze data received by the [[PALFA Survey|PALFA]] Consortium at the [[Arecibo Observatory]] in [[Puerto Rico]].<ref name="aei.mpg.de"/>

On 26 November 2009, a [[CUDA]]-optimized application for the Arecibo Binary Pulsar Search was first detailed on official Einstein@Home webpages. This application uses both a regular CPU and an [[NVIDIA]] GPU to perform analyses faster (in some cases up to 50% faster).<ref name="Forum">{{cite web | url = https://einsteinathome.org/content/abp1-cuda-applications | title = ABP1 CUDA applications | access-date = 2016-11-16 | archive-date = 2016-11-17 | archive-url = https://web.archive.org/web/20161117073027/https://einsteinathome.org/content/abp1-cuda-applications | url-status = live }}</ref>

On 12 August 2010, the Einstein@Home project announced the discovery of a new disrupted binary pulsar, [[PSR J2007+2722]];<ref name="BBC20100813">{{cite news | url = https://www.bbc.co.uk/news/science-environment-10959590 | title = Home computers discover rare star | access-date = 2010-08-13 | work = BBC News | date = August 13, 2010 | archive-date = 2010-08-13 | archive-url = https://web.archive.org/web/20100813195804/http://www.bbc.co.uk/news/science-environment-10959590 | url-status = live }}</ref> it may be the fastest-spinning such pulsar discovered to date.<ref name="Science20100812" /> The computers of Einstein@Home volunteers Chris and Helen Colvin and Daniel Gebhardt observed PSR 2007+2722 with the highest statistical significance.

On 1 March 2011, the Einstein@Home project announced their second discovery: a binary pulsar system [[PSR J1952+2630]].<ref>{{cite news | url = https://einsteinathome.org/content/einsteinhome-discovers-new-binary-radio-pulsar#110856 | title = Einstein@Home Discovers New Binary Radio Pulsar | work = Einstein@Home project homepage | date = March 1, 2011 | access-date = November 16, 2016 | archive-date = November 16, 2016 | archive-url = https://web.archive.org/web/20161116233154/https://einsteinathome.org/content/einsteinhome-discovers-new-binary-radio-pulsar#110856 | url-status = live }}</ref> The computers of Einstein@Home volunteers from Russia and the UK observed PSR J1952+2630 with the highest statistical significance.

By 15 May 2012 a new application for ATI/AMD graphic cards had been released. Using OpenCL, the new application was ten times faster than running on a typical CPU.

On 22 July 2013, an Android application version of the radio pulsar search was announced.<ref>{{Cite web|title=Want to help cure disease or discover new stars? Now you can, using your smartphone|url=https://www.aei.mpg.de/210362/want-to-help-cure-disease-or-discover-new-stars|access-date=2021-06-09|website=www.aei.mpg.de|language=en|archive-date=2021-06-09|archive-url=https://web.archive.org/web/20210609143918/https://www.aei.mpg.de/210362/want-to-help-cure-disease-or-discover-new-stars|url-status=live}}</ref> Like the CPU application, the Android application processes data from Arecibo Observatory.

On 20 August 2013, the discovery of 24 pulsars in data from the Parks Multi-beam Pulsar Survey was published.<ref>{{Cite journal|last1=Knispel|first1=B.|last2=Eatough|first2=R. P.|last3=Kim|first3=H.|last4=Keane|first4=E. F.|last5=Allen|first5=B.|last6=Anderson|first6=D.|last7=Aulbert|first7=C.|last8=Bock|first8=O.|last9=Crawford|first9=F.|last10=Eggenstein|first10=H.-B.|last11=Fehrmann|first11=H.|title=Einstein@Homediscovery of 24 Pulsars in the Parkes Multi-Beam Pulsar Survey|date=2013-08-20|url=https://iopscience.iop.org/article/10.1088/0004-637X/774/2/93|journal=The Astrophysical Journal|language=en|volume=774|issue=2|pages=93|doi=10.1088/0004-637x/774/2/93|issn=0004-637X|arxiv=1302.0467|bibcode=2013ApJ...774...93K|s2cid=118539374|access-date=2021-06-09|archive-date=2021-06-09|archive-url=https://web.archive.org/web/20210609155132/https://iopscience.iop.org/article/10.1088/0004-637X/774/2/93|url-status=live}}</ref> The re-analysis of the data found these pulsars, which were missed by previous analyses and re-analyses of the data. Six of the discovered pulsars are in binary systems.

The discovery of a double neutron star binary in PALFA data by the project was published on 4 November 2016.<ref>{{Cite journal|last1=Lazarus|first1=P.|last2=Freire|first2=P. C. C.|last3=Allen|first3=B.|last4=Aulbert|first4=C.|last5=Bock|first5=O.|last6=Bogdanov|first6=S.|last7=Brazier|first7=A.|last8=Camilo|first8=F.|last9=Cardoso|first9=F.|last10=Chatterjee|first10=S.|last11=Cordes|first11=J. M.|title=Einstein@Home Discovery of a Double Neutron Star Binary in the Palfa Survey|date=2016-11-04|journal=The Astrophysical Journal|language=en|volume=831|issue=2|pages=150|doi=10.3847/0004-637x/831/2/150|arxiv=1608.08211|bibcode=2016ApJ...831..150L|s2cid=20833657|issn=1538-4357|doi-access=free }}</ref> PSR J1913+1102 is in a 4.95 hour orbit with a neutron star partner. By measuring the relativistic periastron advance, the total mass of the system was determined to 2.88 solar masses, similar to the mass of the most massive double neutron star, B1913+16.

Timing analysis of 13 radio pulsars discovered by Einstein@Home were published by the [[PALFA Survey|PALFA Consortium]] in August 2021.<ref>{{cite journal|last1=Parent|first1=E.|last2=Sewalls|first2=H.|last3=Freire|first3=P. C. C.|last4=Matheny|first4=T.|last5=Lyne|first5=A. G.|last6=Perera|first6=B. B. P.|last7=Cardoso|first7=F.|last8=McLaughlin|first8=M. A.|last9=Allen|first9=B.|last10=Brazier|first10=A.|last11=Camilo|first11=F.|title=Study of 72 Pulsars Discovered in the PALFA Survey: Timing Analysis, Glitch Activity, Emission Variability, and a Pulsar in an Eccentric Binary|journal=The Astrophysical Journal|year=2022|volume=924|issue=2|page=135|doi=10.3847/1538-4357/ac375d|arxiv=2108.02320|bibcode=2022ApJ...924..135P|s2cid=244347920 |doi-access=free }}</ref>

On 31 October 2023 the project announced the launch of a new [[Zooniverse]] project called "Pulsar Seekers".<ref>{{Cite web |title=New Zooniverse project "Pulsar Seekers" {{!}} Einstein@Home |url=https://einsteinathome.org/de/content/new-zooniverse-project-%E2%80%9Cpulsar-seekers%E2%80%9D |access-date=2023-12-11 |website=einsteinathome.org}}</ref> In this project, [[Citizen science|citizen scientists]] visually inspect and classify sets of diagnostic plots for pulsar candidates produced from the Einstein@Home analysis of observations from the large Arecibo telescope's PALFA pulsar survey. The goal is to identify new pulsars in these data.<ref>{{Cite web |title=Einstein@Home joins the Zooniverse |url=https://www.aei.mpg.de/1087398/einstein-at-home-joins-the-zooniverse |access-date=2023-12-11 |website=www.aei.mpg.de |language=en}}</ref>

As of December 2023, the Einstein@Home project had discovered a total of 55 radio pulsars: 24 using Parkes Multibeam Survey data and 31 using Arecibo radio data (including two from the Arecibo Binary Radio Pulsar Search and 29 using data from the PALFA Mock spectrometer data from Arecibo Observatory).<ref name=":1" /><ref>{{Cite web |title=Einstein@Home Arecibo Mock spectrometer pulsar detections |url=https://einsteinathome.org/radiopulsar/html/BRP4_discoveries/ |url-status=live |archive-url=https://web.archive.org/web/20160618054737/https://einstein.phys.uwm.edu/radiopulsar/html/BRP4_discoveries/ |archive-date=2016-06-18 |access-date=2022-07-14 |website=einsteinathome.org}}</ref><ref name=":5">{{cite web |title=Einstein@Home - List of pulsars discovered from PMPS data. |url=https://einsteinathome.org/radiopulsar/html/PMPS_discoveries/ |url-status=live |archive-url=https://web.archive.org/web/20110709171701/http://www.einsteinathome.org/radiopulsar/html/PMPS_discoveries/ |archive-date=2011-07-09 |access-date=2022-07-14}}</ref><ref name="ABPredet">{{cite web |title=Einstein@Home Arecibo Binary Radio Pulsar Search (Re-)Detections |url=https://einsteinathome.org/radiopulsar/html/rediscovery_page/rediscoveries.html |url-status=live |archive-url=https://web.archive.org/web/20101027191122/http://einsteinathome.org/radiopulsar/html/rediscovery_page/rediscoveries.html |archive-date=2010-10-27 |access-date=2022-07-14}}</ref>