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Proposal Identification No.: P2624 Date Received: 2011­Feb­04 15:17:16
Technical Page
Proposal Type: Regular
General Category: Pulsars
Observation Category: Extragalactic
Total Time Requested: 96 Hours
Minimum Useful Time: 2 hours
Proposal Title: Expansion of the NANOGrav Pulsar Timing Array
ABSTRACT:
Direct detection of gravitational waves (GW) is a major goal in experimental physics and will revolutionize
astrophysics, opening an entirely new spectrum for exploration. Precision pulsar timing stands an excellent chance
of being the first method to accomplish this feat. Combining data from many objects into a Pulsar Timing Array
(PTA) makes GW detection possible. Increasing the number of pulsars in the array improves sensitivity -- the
detection significance improves approximately linearly with the number of pulsars. Observing more pulsars also
helps mitigate intrinsic systematic timing e#ects. The past year has seen a unexpected and unprecedented number
of new millisecond pulsars (MSPs) discovered, due to several ongoing radio sky surveys (GBT 350­MHz surveys;
PALFA) and targeted radio searches of Fermi­identified gamma­ray point sources. Here we propose an expansion of
our ongoing PTA project to take advantage of these new sources.
Name Institution E­mail Phone Student
Paul B Demorest NRAO pdemores@nrao.edu 434­244­6838 no
Remote Observing Request
Observer will travel to AO
X Remote Observing
In Absentia (instructions to oper­
ator)
Instrument Setup
430 G L­wide S­low 327
Atmospheric Observation Instruments:
Special Equipment or setup: ASP pulsar backend WAPP pulsar backends PUPPI pulsar backend (if
available)
RFI Considerations
1

Frequency Ranges Planned
310­350
420­440
1120­1620
2300­3000
This proposal requires coordination with Punta Salinas radar within the band 1222­1381 MHz..
This proposal requires coordination with GPS L3 at 1381 MHz.
2