Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/LazarustagP2863tp.pdf Дата изменения: Tue Oct 1 18:52:19 2013 Дата индексирования: Mon Apr 11 16:48:35 2016 Кодировка:

Proposal Identification No.:

P2863

Date Received:

2013-Sep-03 15:58:54

Technical Page
This proposal has not been submitted before. Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: Regular Pulsars Galactic 12 Hours 3 hours

Timing J1913+1102: A compact, possibly asymmetric double neutron star sys-

tem
ABSTRACT:
J1913+1102, a 27.3-ms pulsar, was discovered by the PALFA Survey in 2012. Follow-up timing observations have determined this pulsar is in a 4.95-hour binary system with another neutron star. Our preliminary determination of the rate of advance of periastron enables a measurement of the total mass of the system of Mtot 2.87M , assuming General Relativity. The system's low orbital eccentricity, e = 0.0895, suggests the pulsar's companion formed in an electron capture supernova, and is thus relatively light compared to J1913+1102. Alternative theories of gravity predict that such a large mass asymmetry would give rise to dipolar gravitational waves. In this proposal we request 24 hours divided into 4 epochs, each covering a complete orbit of J1913+1102. These observations are the first steps towards determining the masses of the two neutron stars and ultimately testing General Relativity.

Name Patrick Lazarus

Institution Max-PlanckInstitute for Radio Astronomy

E-mail plazarus@mpifr-bonn.mpg.de

Phone +49 228 525 181

Student G

Remote Observing Request

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

Instrument Setup
L-wide Atmospheric Observation Instruments:

1


Sp ecial Equipment or setup:

none

RFI Considerations Frequency Ranges Planned
1150 - 1730 This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST. 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