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Proposal Identification No.:

P2202

Date Received:

2006-Feb-01 16:19:46

Technical Page
Proposal Type: General Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Regular Pulsars 60 Hours

Polarimetric Pulse-Sequence Observations of Bright Unstudied Arecibo Pulsars

New polarimetric pulse-sequence observations are proposed on a group of heretofore unstudied Arecibo pulsars. Of the about 350 "normal" pulsars in the Arecibo sky, some 190 have never been studied polarimetrically. To our great surprise, a significant number of these stars are quite bright, well strong enough to support detailed pulse-sequence analyses. In previous work under the P1639, P1734, P1978 and (only half approved) P2110 pro jects, we observed some 130 pulsars and identified a number of uniquely interesting individual ob jects as well as finding new phenomena and patterns of emission behavior. We have also determined more than 60 new rotation measures. Our estimates indicate that there are at least some 30­50 unstudied stars which can be observed with a single-pulse S/N more than 10 (and typically 20­30), and experience has shown that there are probably at least an equal number which so far lack reliable flux density estimates. Some of these stars were discovered in recent surveys, but nearly half have been known from earlier surveys. Studies of such second-tier stars have already extended our conceptions of pulsar emission behavior and altered our understanding of what is usual and typical. We believe that it is now urgent work that this long overdue annd must be carried out before similar pressures develop for the many expected PALFA ob jects.

Name Joanna M Rankin

Institution University of mont

Ver-

E-mail Joanna.Rankin@uvm.edu

Phone 802/656-0051

Student

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
L-wide 327

Atmospheric Observation Instruments: 1


Sp ecial Equipment or setup:

none

RFI Considerations Frequency Ranges Planned
1100­1700 314­340 This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST. 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