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Proposal Identification No.:

P2030 Arecibo Observatory

Date Received: 2014-Sep-02 00:28:12 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Sep 1 2014. This proposal has been submitted before. The previous proposal number is P2030. Proposal Type: General Category: Observation Category: Time Requested this semester: Hours already used for this pro ject: Additional Hours required to complete pro ject: Minimum Useful Time: Expected Data Storage: Prop osal Title: ABSTRACT: Large Pulsars Galactic 197 1938 1133 1.5 over 500 GB

Continuing the PALFA Galactic Plane Survey

We propose to continue the PALFA survey of the Arecibo-visible Galactic Plane. The most sensitive pulsar survey ever done, PALFA is yielding high-impact science in a variety of astrophysical fields, including: fast radio bursts, high-precision tests of relativistic gravity theories, constraints on the equation-of-state of supra-nuclear matter, detectability of gravitational waves, and unification of the neutron star zoo. Additionally this survey constrains fundamental properties of the overall neutron-star population. PALFA has already discovered 138 pulsars, nearly doubling the number known in the survey region. For the coming year, we request a total of 197 hr of inner Galaxy time in order to complete our survey to |b|<2.0 deg, as well as to be secondary commensal partners with ongoing surveys of the outer Galactic Plane. With the requested inner Galaxy time we expect to discover an additional 30-35 radio pulsars and constrain models of the Galactic distribution of pulsars. Outreach Abstract: An international team of astronomers is proposing to continue the PALFA survey, a large pro ject whose aim is to find new and fascinating pulsars. Pulsars are rapidly rotating neutron stars (the remains of stars more massive than our Sun, but not massive enough to form black holes) that emit radio waves in beams, acting as interstellar lighthouses. PALFA is the most sensitive survey for pulsars ever done and may help to answer questions about Einstein's theory of gravity, matter with densities exceeding that of atomic nuclei, the existence of gravitational waves, which are predicted by Einstein's theories but have never been directly observed, and unification of the "neutron star zoo". PALFA will also help to answer important questions about the total number of neutron stars in our Galaxy and their fundamental properties. PALFA has already discovered 138 pulsars, nearly doubling the number known in the region being surveyed, and will uncover many more pulsars in the future.

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Name Victoria M. Kaspi James Cordes

Institution McGill University Cornell University

E-mail vkaspi@physics.mcgill.ca cordes@astro.cornell.edu

Phone 5143986412 6072550608

Student no no

Additional Authors
B. Allen bruce.allen@aei.mpg.de S. Bogdanov slavko@astro.columbia.edu A. Brazier abrazier@astro.cornell.edu F. Camilo fernando@astro.columbia.edu F. Cardoso rcardoso@mix.wvu.edu (grad student) S. Chatterjee shami@astro.cornell.edu F. Crawford fcrawfor@fandm.edu J. Deneva deneva@naic.edu R. Ferdman rferdman@physics.mcgill.ca J. Hessels J.W.T.Hessels@uva.nl F. Jenet fredricka jenet@gmail.com C. Karako-Argaman karakoc@physics.mcgill.ca (grad student) B. Knispel Benjamin.Knispel@aei.mpg.de P. Lazarus plazarus@mpifr bonn.mpg.de (grad student) K. Lee kjlee@mpifr bonn.mpg.de R. Lynch rlynch@physics.mcgill.ca A. Lyne andrew.lyne@manchester.ac.uk E. Madsen madsense@physics.mcgill.ca (grad student) M. McLaughlin maura.mclaughlin@mail.wvu.edu S. Ransom sransom@nrao.edu P. Scholz pscholz@physics.mcgill.ca (grad student) X. Siemens siemens@gravity.phys.uwm.edu L. Spitler laura.spitler@gmail.com I. Stairs stairs@astro.ubc.ca more authors at http://www2.naic.edu/alfa/pulsar/

This work is part of both a PhD and a MS thesis.

Remote Observing Request

Observer will travel to AO X Remote Observing In Absentia (instructions to operator)

Section I I - Time Request
The following times are in LST. For these observations night-time is not needed.

Begin ­ End Interval­Interval 18 ­ 20:58 ­ ­ ­ 2

Days Needed at This Interval 66


Time Constraints (Must Be Justified in the Prop osal Text)

Section I I I - Instruments Needed
ALFA Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

Section IV - RFI Considerations Frequency Ranges Planned
1215-1536 This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz.. This proposal requires coordination with GPS L3 at 1381 MHz.

Section V - Observing List Target List
We are searching the Galactic Plane with |b|<2 degrees.

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