Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/HankinstagP2160tp.ps Дата изменения: Tue Oct 11 01:26:31 2005 Дата индексирования: Sat Dec 22 22:49:00 2007 Кодировка: Поисковые слова: solar system

Proposal Identification No.: P2160 Date Received: 2005­Sep­30 19:15:53
Technical Page
Proposal Type: Regular
General Category: Pulsars
Observation Category:
Total Time Requested: 18 Hours
Proposal Title: Ultra­High Time Resolution Measurements of the Crab ''Giant'' Radio Pulses:
Phase 4 -- The High­Frequency Components
ABSTRACT:
The Crab Nebula pulsar emits occasional ''giant'' pulses which are often hundreds of times more energetic than the
average pulse. These pulses occur predominantly at the pulse phase of the average main pulse at low frequencies
and predominantly at the pulse phase of the high­frequency interpulse above 7 GHz. Our ultra­high time resolution
studies have shown that the temporal and frequency structure of the main and interpulse are dramatically di#erent.
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 high­frequency components of the average
profile, which occur at pulse phases following the interpulse. We propose to capture single ''giant'' pulses from the
phases of the two high­frequency components in order to ascertain if their emission environment and origin are the
same as either the main pulse or interpulse.
Name Institution E­mail Phone Student
Timothy H Hankins New Mexico Institute
of Mining and Tech­
nology
thankins@nrao.edu (505) 835­7326 no
Service Observing Request Remot e Observing Request
X None X No
All of the observing run. Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
X­high
Atmospheric Observation Instruments:
Description of Observer Equipment: We will use the data acquisition systems we have built and
1

installed at the Observatory.
Special Equipment or setup: none
RFI Considerations
Frequency Ranges Planned
8000­10500
2