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Proposal Identification No.:

P2778 Arecibo Observatory

Date Received: 2012-Sep-04 16:37:50 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Sep 1 2012. This proposal has not been submitted before. 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: Regular Pulsars Galactic 2.5 0 0 2.5hr less than 100 GB

A Global Campaign for Precision Timing of a Millisecond Pulsar

We request a single 3-hour session on PSR J1713+0747, the most precisely timed millisecond pulsar, that will serve as the cornerstone for a 24-hr international campaign involving telescopes in North American, Europe, and Australia. The purpose of this campaign is to understand the different contributions to the timing error budget, to perform a detailed study of scintillation properties, pulse jitter, and pulse profile evolution with frequency, and to determine timing offsets between the different telescopes. These goals are all crucial to the International Pulsar Timing Array effort and to shortening the time to detection of gravitational waves using pulsar timing. Outreach Abstract: Pulsars are rotating neutron stars whose stable spin rates can be used as clocks. Our overall pro ject is to use the best pulsars to detect ripples in space time -- gravitational waves-- which were predicted to exist by Albert Einstein from his General Theory of Relativity. The specific proposal to Arecibo is part of an international campaign using multiple telescopes around the world to monitor one of the best pulsars for a 24-hour period in order to better understand its properties and limitations as a clock. The observations also aim to improve the measurement precision of the pulses so that the sensitivity to gravitational waves can be improved.

Name James M Cordes Maura A McLaughlin

Institution Cornell University West Virginia University

E-mail jmc33@cornell.edu maura.mclaughlin@mail.wvu.edu

Phone 607 255 0608 304-293-4812

Student no no

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Additional Authors
Shami Chatterjee, shami@astro.cornell.edu Paul Demorest, pdemores@nrao.edu Sam Finn, lsfinn@psu.edu Rick Jenet, fredricka jenet@gmail.com Glenn Jones, glenn.caltech@gmail.com Michael Keith, mkeith@pulsarastronomy.net Michael Kramer, mkramer@mpifr.de Michael Lam, mtl82@cornell.edu (grad student) Joseph Lazio, Joseph.Lazio@jpl.nasa.gov Dustin Madison, drm252@cornell.edu (grad student) David Nice, niced@lafayette.edu Nipuni Palliyaguru, npalliya@mix.wvu.edu (grad student) Delphine Perrodin, delphine@oa-cagliari.inaf.it Scott Ransom, sransom@nrao.edu Ryan Shannon, ryanmshannon@gmail.com Ingrid Stairs, stairs@astro.ubc.ca Ben Stappers, Ben.Stappers@manchester.ac.uk Dan Stinebring, dan.stinebring@oberlin.edu Weiwei Zhu, zhuww@phas.ubc.ca

This work is part of a PhD thesis.

Remote Observing Request

X

Observer will travel to AO 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 15:30 ­ 1830 ­ ­ ­

Days Needed at This Interval 1

Time Constraints (Must Be Justified in the Prop osal Text) Scheduling of this pro ject needs to be coordinated with that of the GBT, Effelsberg, Jodrell Bank, and Parkes (and possibly WSRT).

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

Sp ecial Equipment or setup: PUPPI = primary pulsar backend

Section IV - RFI Considerations Frequency Ranges Planned
1150 - 1730 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
J1713+0747 17:13:49.0 +07:47:37.0 LST rise 16:06 LST set 18:22 Time request is to start 36 minutes before rise to conduct calibrations prior to pulsar observations.

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