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Proposal Identification No.:

P2474

Date Received:

2009-Feb-02 19:25:19

Technical Page
Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Large Pulsars Extragalactic 510 Hours 2 hours

Detecting nHz Gravitational Radiation using a Pulsar Timing Array

Direct detection of gravitational radiation (GR) is a ma jor goal in experimental physics and will revolutionize astrophysics, opening an entirely new spectrum for exploration. Pulsar timing is sensitive to GR with periods comparable to the experiment duration (nanohertz frequencies). The nHz GR signal is expected to be dominated by the stochastic background of massive black hole binaries. For the past four years our group has performed regular observations of a set of 17 pulsars, with the goal of obtaining very high-precision (<1 us) timing. We propose to continue this long term precision pulsar timing pro ject for the next three years, through 2012, on an expanded list of sources. The three additional years of measurement being proposed here, when combined with data from our previous observations, will provide the best detection sensitivity to nHz-regime gravitational radiation ever achieved. This proposal is submitted by the authors on behalf of the entire NANOGrav collaboration.

Name Paul Demorest

Institution NRAO

E-mail pdemores@nrao.edu

Phone 434-244-6838

Student no

Remote Observing Request

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

Instrument Setup
430 G L-wide S-low 327

Atmospheric Observation Instruments:

Description of Observer Equipment: ASP pulsar backend Sp ecial Equipment or setup: none 1


RFI Considerations Frequency Ranges Planned
310-350 420-440 1120-1620 2300-3000

This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz.. This proposal requires coordination with GPS L3 at 1381 MHz.

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