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Proposal Identification No.:

P2866 Arecibo Observatory

Date Received: 2014-Sep-02 16:56:38 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Sep 1 2014. This proposal has been submitted before. The previous proposal number is P2866. Proposal Type: General Category: Observation Category: Time Requested this semester: Hours Next Semester: Hours already used for this pro ject: Additional Hours required to complete pro ject: Minimum Useful Time: Expected Data Storage: Prop osal Title: Regular Pulsars Galactic 9 6 19.75 0.5 hours less than 100 GB

Further Follow-up of Millisecond Pulsars Discovered in the Arecibo 327 MHz

Drift Scan Survey
ABSTRACT: The Arecibo Observatory 327 MHz Drift Scan survey has discovered 46 new radio pulsars. One of the new discoveries is an MSP in an eccentric system. We have initial measurements of the rate of periastron advance as well as a Shapiro delay, however many of the parameters are still covariant. We request 12 hours to complement other observations of this MSP that are ongoing to remove these covariances. Another discovery of ours is an MSP in a circular orbit with a 0.4 solar mass companion. We request 3 hours of observations near superior conjunction to attempt to detect a Shapiro delay. Outreach Abstract: The Arecibo Observatory 327 MHz Drift survey utilizes time in which the telescope is not fully functional such as during times in which the telescope is undergoing repair as well as time which is under-requested to search the sky for a type of star called a radio pulsar. Radio pulsars are very dense ob jects called neutron stars that emit beams of radio waves out of their magnetic poles. As the star spins, the beams of radio waves sweep over the Arecibo Observatory causing a very regular pulse appearing as if it is a pulsating star (pulsar). This survey has detected 46 new pulsars total and 14 within the past year. This pro ject will monitor two of these sources. One of the sources is a pulsar that spins 280 times every second and is in a non-circular orbit with a companion star. The other is a pulsar that spins about 100 times every second and is in an orbit with a 0.4 solar mass companion.

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Name Kevin Stovall Paulo C Freire

Institution University of New Mexico Max-Planck-Institut fur Radioastronomie

E-mail stovall.kevin@gmail.com pfreire@mpifr-bonn.mpg.de

Phone 3252262495

Student no no

Additional Authors
J. Deneva (julia.deneva@gmail.com), J. Martinez (joey.martinez10@gmail.com), S. Bates (sam.d.bates@gmail.com), F. Jenet (fredricka jenet@gmail.com), M. A. McLaughlin (maura.mclaughlin@mail.wvu.edu), M. Bagchi (manjari.bagchi@gmail.com)

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 not needed.

Begin ­ End Interval­Interval 21:30 ­ 23:15 07:45 ­ 09:00 ­ ­

Days Needed at This Interval 6 3

Time Constraints (Must Be Justified in the Prop osal Text) The observations at LST near 22:00 should be scheduled once every 30 (plus or minus 3 days). The observations near LST 08:00 should be scheduled on 3 consecutive days with the center day being at superior conjunction. See the scientific justification for details.

Next Semester Time Request
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Begin ­ End Interval­Interval 21:30 ­ 23:15 ­ ­ ­

Days Needed at This Interval 6

Time Constraints (Must Be Justified in the Prop osal Text) The observations should be scheduled once every 30 (plus or minus 3 days).

Section I I I - Instruments Needed
L-wide Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

Section IV - RFI Considerations Frequency Ranges Planned

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
J2234+0611 22:34:23.1 06:11:28.7 21:31:21 23:38:57 J0824+00 08:24:24.8 03:20:06.0 07:33:23 09:16:58

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