Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/StinebringtagP2419tp.pdf Дата изменения: Wed Jun 11 19:00:47 2008 Дата индексирования: Wed Jan 14 18:00:54 2009 Кодировка: Поисковые слова: arp 220

Proposal Identification No.:

P2419

Date Received:

2008-Jun-02 23:21:25

Technical Page
Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Pulsars Galactic 9 Hours 2 hours

Ultra-fine scintillation features in the pulsar B0834+06

Numerous lines of evidence, including the high sensitivity study of pulsar scintillation at Arecibo, indicate that there are compact, overpressured structures in the ionized interstellar medium. The origin and lifetime of these structures is not well understood. We propose new baseband-sampled observations of a well-studied pulsar (B0834+06) that exhibits ultra-thin parabolic arclets in its secondary spectrum. By recording the baseband signal with a Mark 5 VLBI recorder and using decoding software that has been developed in the VLBI community, we will be able to produce a dynamic spectrum of high spectral and temporal resolution. We have an ongoing simulation effort that attempts to produce secondary spectra with features like those that we expect to observe. The ultimate goal is to understand the physical conditions of the discrete and stochastic structures that produce the ultrathin arclet features, including the high degree of anisotropy that must be present in the inhomogeneities.

Name Dan R Stinebring

Institution Oberlin College

E-mail dan.stinebring@oberlin.edu

Phone 440-775-8331

Student no

Remote Observing Request

X

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

Instrument Setup
327 Atmospheric Observation Instruments:

Sp ecial Equipment or setup: We will need the Mark 5 VLBI recording system. However, there is no coordination with other VLBI stations. This is an Arecibo-only pro ject.

RFI Considerations
1


Frequency Ranges Planned

2