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Proposal Identification No.:

P2780

Date Received:

2012-Sep-04 15:39:41

Technical Page
Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Large Pulsars Extragalactic 185 Hours 1.5 hours

The North American Nanohertz Observatory for Gravitational Waves

Direct detection of gravitational waves (GW) is a ma jor goal in experimental physics and will open an entirely new astronomical spectrum. Precision pulsar timing stands an excellent chance of being the first method to accomplish this feat. Combining data from many ob jects into a Pulsar Timing Array (PTA) makes GW detection possible. Long timing baselines (510 years) dramatically improve GW sensitivity. Increasing the number of pulsars in the array also improves sensitivity, and the past several years have seen a unexpected number of new millisecond pulsars discovered. New instrumentation for pulsar timing now provides an order of magnitude more bandwidth than previous instruments. In this proposal, we request time to continue and expand our ongoing PTA pro ject over the next year, taking advantage of all these improvements. These results will provide the best GW sensitivity yet achieved, and will significantly constrain the astrophysics of GW sources.

Name Paul B 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

Atmospheric Observation Instruments:

Sp ecial Equipment or setup: PUPPI (primary) ASP (backup; to be discontinued in 1 year)

RFI Considerations
1

Frequency Ranges Planned
420 - 440 1150 - 1800 1700 - 2400 This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz.. This proposal requires coordination with GPS L3 at 1381 MHz.

2