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Proposal Identification No.:

P2790 Arecibo Observatory

Date Received: 2012-Sep-04 15:58:39 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Sep 1 2012. This proposal has not been submitted before. 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: ABSTRACT: Regular Pulsars Galactic 21 9 0 .75 hours less than 100 GB

Followup Timing of 3 Pulsars Discovered in a 327 MHz Drift Survey

We are requesting time for follow-up observations of 3 pulsars discovered in the Arecibo Observatory 327 MHz Drift survey (p1693). Our new discoveries include what is likely to be a partially recycled system, a young pulsar, and a slow pulsar which exhibits rotating radio transient like behavior. We request 30 hours over the course of a year in order to characterize these systems and build timing solutions. Such observations will allow us to derive physical characteristics of these new discoveries. 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 which send 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 eight new pulsars and six within the past year. We are taking data to monitor three of these new discoveries which includes a pulsar in orbit around another star, a pulsar which resulted from a supernova about 8,000 years ago (not very long in stellar times), and a pulsar whose pulses vary greatly in brightness from one pulse to the next.

Name Kevin M Stovall Julia Deneva

Institution University of Texas at Brownsville National Astronomy and Ionosphere Center

E-mail stovall.kevin@gmail.com deneva@naic.edu

Phone 325-226-2495 extension 315

Student G no

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Additional Authors
Fredrick A. Jenet UTB fredricka jenet@gmail.com Jose G. Martinez UTB joey.martinez10@yahoo.com undergrad Maura A. McLaughlin WVU Maura.McLaughlin@mail.wvu.edu Paulo Freire MPI pfreire@mpifr-bonn.mpg.de

This work is part of a MS 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 03:30 ­ 06:15 20:50 ­ 23:20 ­ ­

Days Needed at This Interval 13 13

Time Constraints (Must Be Justified in the Prop osal Text) Spectral Analysis: 1 session at each LST, no constraints. Phase Connection: Sessions for each LST on days 1,2,3,5,10, and 20. Routine Observations: First session should be scheduled 30 +/- 3 days from the beginning of the "Phase Connection" observations and continue to be scheduled every 30 +/- 3 days for six months. Note: The LST ranges can be scheduled completely independent from one another.

Next Semester Time Request

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Begin ­ End Interval­Interval 03:30 ­ 06:15 20:50 ­ 23:20 ­ ­

Days Needed at This Interval 6 6

Time Constraints (Must Be Justified in the Prop osal Text) Routine Observations: Sessions should be scheduled every 30 +/- 3 days for the remaining six months.

Section I I I - Instruments Needed
L-wide 327

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

Section IV - RFI Considerations Frequency Ranges Planned
322-372 1150-1730 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
J2204+27 22:04:51.3 27:02:08.1 20:48:48 23:22:09 J0457+23 04:57:06.4 23:38:02.6 03:36:33 06:19:15 J0453+16 04:53:33.9 16:06:33.9 03:32:20 06:16:18

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