Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/NowakowskitagP2115tp.pdf Дата изменения: Tue Oct 18 06:53:04 2005 Дата индексирования: Sat Dec 22 23:58:18 2007 Кодировка: Поисковые слова: cygnus

Proposal Identification No.:

P2115

Date Received:

2005-Jun-01 23:45:27

Technical Page
Proposal Type: General Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Regular Pulsars Galactic 12 Hours

Possible Radius-to-Intensity Mapping and Mode Switching in PSR B0950+08

We request 12 hours of telescop e time for observations of a well-known pulsar, PSR B0950+08, in which we want to investigate whether its average profile at the same observing frequency represents different physical conditions at different emission heights. This is motivated by our recent findings of a significant intensity-dep endence of the average profile, suggesting different emission heights as a p ossible explanation. The concept may b e further supp orted by our finding that the average profile taken at 430 MHz is sometimes almost identical with the average profile of the weakest pulses taken at 1175 and 1475 MHz. In this mo de emitting regions at lower and higher frequencies may overlap vertically. It is our aim to confirm and further investigate these results. We exp ect that our new results will contribute to estimates of the emission heights and have implications for b etter understanding of the geometry of this puzzling pulsar.

Name Leszek A Nowakowski

Institution University of Puerto Rico

E-mail leszekan@coqui.net

Phone 787-265-3844 ext. 2025

Student no

Service Observing Request

Remot e Observing Request

None All of the observing run. X Part of the observing run. Queue Observing

X

No Maybe Yes

Instrument Setup
430 G L-wide

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
1


Frequency Ranges Planned
1200 - 1680 422 - 442 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