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Proposal Identification No.:

P2822

Date Received:

2013-Mar-01 16:15:56

Technical Page
This proposal has not been submitted before. Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Pulsars 6 Hours 45 minutes

Continued timing of a millisecond pulsar in a stellar triple system

We have discovered and are successfully timing a relatively bright millisecond pulsar in a hierarchical stellar triple system. The inner binary comprises a millisecond pulsar in a 1.6-day orbit with a hot, low-mass white dwarf. Yet this inner binary is being orbited by a likely 0.2-0.5 solar-mass star of unknown type in a 327-day orbit. This unique pulsar, and the supremely high-precision measurements of secularly varying orbital parameters provided by millisecond pulsar timing, will eventually be a testbed for the dynamics of 3-body systems. With a new timing model we are currently working on, we expect a full "solution" of the system, including inclinations of the orbits and precise masses for all three stars, this year.

Name Duncan Lorimer

Institution West Virginia University

E-mail duncan.lorimer@mail.wvu.edu

Phone 3042900417

Student no

Remote Observing Request

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

Instrument Setup
L-wide Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
1


Frequency Ranges Planned

2