Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/WolszczantagP2997tp.pdf Дата изменения: Wed Mar 11 02:46:34 2015 Дата индексирования: Mon Apr 11 17:28:12 2016 Кодировка: Поисковые слова: annular solar eclipse

Proposal Identification No.:

P2997

Date Received:

2015-Feb-28 15:54:08

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: Director Discretionary Time Pulsars Galactic 40 Hours 2

High-cadence timing observations of the planets pulsar, PSR B1257+12

We propose to resume timing observations of the planets pulsar, PSR B1257+12, with the Arecibo telescope at 430 MHz and L-band frequencies, using the PUPPI backend. We would like to conduct one-month, high-cadence observations to obtain 18 pulse arrival times that should allow us to phase connect our new measurements to the existing data set spanning the period from 1991 through 2009. The new data will also tell us how much improvement in timing precision can be achieved with the PUPPI backend, compared to the 3.5 microsecond long-term, post-fit residual obtained with the Penn State Pulsar Machine (PSPM) for the post-upgrade, 1997-2009 data. If a 1 microsecond precision can be attained, it will be possible to use PSR B1257+12 and other solitary millisecond pulsars visible from Arecibo to explore the currently untouched part of the neutron star planet parameters space involving low-mass bodies in short-period orbits.

Name Alexander Wolszczan

Institution Penn State University

E-mail alex@astro.psu.edu

Phone 814 863 1756

Student no

Remote Observing Request

X

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

Instrument Setup
430 G L-wide

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none 1


RFI Considerations Frequency Ranges Planned
1.15 - 1.73 GHz 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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