Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/HankinstagP2160tp.pdf Дата изменения: Tue Oct 11 01:34:45 2005 Дата индексирования: Sat Dec 22 23:19:35 2007 Кодировка: Поисковые слова: crab nebula

Proposal Identification No.:

P2160

Date Received:

2005-Sep-30 19:15:53

Technical Page
Proposal Type: General Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT:
The Crab Nebula pulsar emits o ccasional "giant" pulses which are often hundreds of times more energetic than the average pulse. These pulses o ccur predominantly at the pulse phase of the average main pulse at low frequencies and predominantly at the pulse phase of the high-frequency interpulse ab ove 7 GHz. Our ultra-high time resolution studies have shown that the temp oral and frequency structure of the main and interpulse are dramatically different. During our previous studies of the main and interpulse (P1735 and P2050) we have noticed that when the pulsar is particularly strong, we can see individual pulses at the phases of the two high-frequency comp onents of the average profile, which o ccur at pulse phases following the interpulse. We prop ose to capture single "giant" pulses from the phases of the two high-frequency comp onents in order to ascertain if their emission environment and origin are the same as either the main pulse or interpulse.

Regular Pulsars 18 Hours

Ultra-High Time Resolution Measurements of the Crab "Giant" Radio Pulses: Phase 4 ­ The High-Frequency Components

Name Timothy H Hankins

Institution New Mexico Institute of Mining and Technology

E-mail thankins@nrao.edu

Phone (505) 835-7326

Student no

Service Observing Request

Remot e Observing Request

X

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

X

No Maybe Yes

Instrument Setup
X-high Atmospheric Observation Instruments:

Description of Observer Equipment: We will use the data acquisition systems we have built and 1


installed at the Observatory. Sp ecial Equipment or setup: none

RFI Considerations Frequency Ranges Planned
8000-10500

2