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Proposal Identification No.:

P2865 Arecibo Observatory

Date Received: 2013-Sep-03 17:52:22 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Sep 1 2013. This proposal has not been submitted before. Proposal Type: General Category: Observation Category: Time Requested this semester: Hours already used for this pro ject: Additional Hours required to complete pro ject: Minimum Useful Time: Expected Data Storage: Prop osal Title: ABSTRACT: Regular Pulsars 34 32 3 hours 100-500 GB

Pulse-Sequence Polarimetry of Selected Arecibo Pulsars

We propose a further program of sometimes lengthy polarimetric observations on sets of pulsars for which other or shorter observations have been made and found inadequate for useful analysis. The new observations will pursue moding phenomena, supplement our observations of core emission, study nulling and drifting effects, and expand the arena wherein the physical propagation modes can be identified. We will also push our observations and analyses, including microstructure, to faster pulsars, document off-pulse emission and measure new RMs. Given our past success and the unique significance of polarimetric pulse-sequence (PS) measurements made with the Arecibo telescope, we propose a continuing program over the next year to conduct observations of high quality and importance both immediately for the proposers and students as well the pulsar-emission-problem community at large. We request 34 hours during the next cycle of which 35% (12 hours) would be in the 18-21-hour RA region. Outreach Abstract: We propose a further program of sometimes lengthy polarimetric observations on sets of pulsars for which other or shorter observations have been made and found inadequate for useful analysis. The new observations will focus on understanding the rich phenomena that pulsars exhibit, their different personalities or "modes", their perplexing stoppages or "nulls", their beautiful "drifting" subpulses, polarization effects and emission from unexpected places in their magnetospheric environs. Pulsars have been known for half a century, but they continue to puzzle and perplex us, and they provide some of the most "exotic" conditions in the cosmos for studying and applying what we know about physics.

Name Joanna M Rankin Dipanjan Mitra

Institution University of Vermont National Centre for Radio Astrophysics, Pune, India

E-mail Joanna.Rankin@uvm.edu dmitra@ncra.tifr.res.in

Phone 802 656-0051 +91 25719247 (off ) 20

Student

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Additional Authors
Dan Orfeo, UVM undergraduate Joel Weisberg, Carleton College Geoffrey Wright, Sussex University, UK

This work is not part of a thesis.

Remote Observing Request

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

Section I I - Time Request
The following times are in LST. For these observations night-time is preferred.

Begin ­ End Interval­Interval 03:00 ­ 12:00 15:00 ­ 21:00 17:00 ­ 21:00 17:00 ­ 24:00

Days Needed at This Interval 1 1 3 1

Time Constraints (Must Be Justified in the Prop osal Text) Evenings and weekends preferred to minimize RFI

Section I I I - Instruments Needed
L-wide 327

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

Section IV - RFI Considerations
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Frequency Ranges Planned
302-352 MHz 1170-1270 MHz 1320-1620 MHz 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.

Section V - Observing List Target List
See proposal. As in past when the proposal is approved, I will communicate with Hector Hernandez about available time and pulsars to be observed.

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