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Дата изменения: Fri Sep 6 19:44:25 2013
Дата индексирования: Sat Mar 1 01:39:33 2014
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Поисковые слова: vallis

Proposal Identification No.:

P2789 Arecibo Observatory

Date Received: 2013-Sep-03 16:44:08 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Sep 1 2013. This proposal has been submitted before. The previous proposal number is P2789. Proposal Type: General Category: Observation Category: Time Requested this semester: Hours Next 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: Regular Pulsars Galactic 31 21 36 0.5 minutes less than 100 GB

Timing of pulsars discovered by the PALFA survey

We request a total of 52 hours over the course of a year for timing observations of 12 pulsars. Of these, we wish to derive precision timing solutions for four pulsars discovered in the PALFA survey in the last 6 months, in order to determine spin and binary parameters, and hence fundamental properties such as astrometry, ages, magnetic fields, and spin-down luminosities. We also wish to continue to monitor several pulsars already part of this and other (now completed) observing campaigns. Seven of the proposed sources are millisecond and/or binary pulsars, each with particular science potential, two are transient emitters (RRATs), two are long-period pulsars vital for population and Galactic studies, one of which may be a candidate intermittent pulsar. Finally, there is one young pulsar whose precision spin model will be required to search for a pulsed counterpart in Fermi telescope observations. Outreach Abstract: Pulsars are the neutron-star remnants of massive stars that have died in a supernova explosion. They spin very quickly up to hundreds of times every second and emit radio beams as a lighthouse, which we see at every rotation. These rotations can be counted very precisely; this is our aim for the 13 pulsars proposed in this pro ject, discovered by the ALFA pulsar survey. These observations are needed to precisely determine the properties of these pulsars, including their ages and magnetic field strengths. Some of these pulsars are in orbit with unseen companion stars with these observations, we will be able to describe these orbits as well. Several of these ob jects will allow us to perform tests of Einstein's theory of relativity, and perhaps study the matter that make up these stars. In general, they will also allow the study the neutron star population as a whole.

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Name Robert D Ferdman Ingrid H Stairs

Institution McGill University University of British Columbia

E-mail rferdman@physics.mcgill.ca stairs@astro.ubc.ca

Phone +1 514 6520 +1 604 6796

398 822

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; camilo@naic.edu F. Cardoso; rcardoso@mix.wvu.edu (grad student) S. Chatterjee; shami@astro.cornell.edu J. Cordes; cordes@astro.cornell.edu F. Crawford; fcrawfor@fandm.edu J. Deneva; deneva@naic.edu P. Freire; pfreire@mpifr-bonn.mpg.de J. Hessels; J.W.T.Hessels@uva.nl V. Kaspi; vkaspi@physics.mcgill.ca B. Knispel; Benjamin.Knispel@aei.mpg.de P. Lazarus; plazarus@mipfr-bonn.mpg.de (grad student) J. van Leeuwen; leeuwen@astron.nl D. Lorimer; Duncan.Lorimer@mail.wvu.edu R. Lynch; rlynch@physics.mcgill.ca A. Lyne; agl@jb.man.ac.uk M. McLaughlin; maura.mclaughlin@mail.wvu.edu S. Ransom; sransom@nrao.edu P. Scholz; pscholz@physics.mcgill.ca (grad student) L. Spitler; laura.spitler@gmail.com K. Stovall; stovall.kevin@gmail.com J. Swiggum; swiggumj@gmail.com (grad student) W. Zhu; zhuww@phas.ubc.ca Full list at: http://www.naic.edu/ deneva/palfa/

This work is part of a PhD 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 05:45 06:15 18:26 20:00 19:10 20:18 2

Days Needed at This Interval 6 6 14

Time Constraints (Must Be Justified in the Prop osal Text) One of our sources (PSR J0557+1551) is found toward the Galactic anticenter, and so will have to be scheduled separately. The second set of constraints are for sources for which we only require monthly monitoring this semester. They are observed differently from the third set, which are newly discovered pulsars, and so to make observing more efficient, we divide them into separate sets. For the first month of this semester, the third set requires special observing cadence. Please see the scientific justification for further explanation. Note: the minimum useful single session time noted below represents the amount needed to observe only one pulsar in our source list for the typical length for this pro ject.

Next Semester Time Request

Begin End IntervalInterval 05:45 06:15 18:26 20:00 19:10 20:18

Days Needed at This Interval 6 6 6

Time Constraints (Must Be Justified in the Prop osal Text) We require the same constraints as in first semester, except the third set only requires monthly observations in the second semester.

Section I I I - Instruments Needed
L-wide Atmospheric Observation Instruments:

Sp ecial Equipment or setup: We will use the PUPPI backend.

Section IV - RFI Considerations Frequency Ranges Planned
1180-1780 This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz.. 3

This proposal requires coordination with GPS L3 at 1381 MHz.

Section V - Observing List Target List
PSR J0557+1551 PSR J1902+0300 PSR J1905+04 PSR J1906+0055 PSR J1911+09 PSR J1913+1102 PSR J1925+1721 PSR J1957+25 RRAT J1906+03 PSR J1943+2210 PSR J1952+25 RRAT J2010+3146

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