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Proposal Identification No.:

P2825 Arecibo Observatory

Date Received: 2013-Mar-01 15:20:15 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Mar 1 2013. 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: Regular Pulsars Galactic 54.5 24 0 0 1 hour less than 100 GB

Followup Timing of 12 Discoveries from the Arecibo Observatory 327 MHz Drift

Survey
ABSTRACT: The Arecibo Observatory 327 MHz Drift Survey has discovered 16 radio pulsars and 1 rotating radio transient (RRAT). We are requesting time to follow-up 12 of these new discoveries which include the RRAT, a millisecond pulsar (MSP), and an intermediate period pulsar. The MSP and intermediate period pulsars both show signs of being in binary systems. These observations will allow us to very precisely measure the pulsars' spin, astrometric, and binary parameters (if applicable). The MSP was very bright in the one minute long discovery observation and has a thin pulse, so it looks like a good candidate for inclusion in ongoing pulsar timing array experiments. 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 17 new pulsars total and 14 within the past year. We are taking data to monitor twelve of these new discoveries, including a pulsar which spins about 100 times every second and likely has a companion star, a source which only sparsely emits pulses, and another which is either very young or has a companion star.

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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

Additional Authors
Paulo Freire MPI pfreire@mpifr-bonn.mpg.de Maura A. McLaughlin WVU Maura.McLaughlin@mail.wvu.edu Fredrick A. Jenet UTB fredricka jenet@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 01:30 ­ 03:30 05:30 ­ 07:30 08:00 ­ 10:00 18:00 ­ 20:00

Days Needed at This Interval 13 13 13 13

Time Constraints (Must Be Justified in the Prop osal Text) Details for these observations are described in the "Proposed Observations" section of the proposal. For each LST range, we request a single slightly longer observation to perform spectral analysis of the pulsars. Then a set of observations to get initial phase connection spaced on days 1,2,3,5,10, and 20. We then 2


request an observation be scheduled on day 30, which begins our monthly monitoring of these sources in which we request observations be scheduled every 30 +/- 3 days for the remainder of the semester.

Next Semester Time Request

Begin ­ End Interval­Interval 01:30 ­ 03:30 05:30 ­ 07:30 08:00 ­ 10:00 18:00 ­ 20:00

Days Needed at This Interval 6 6 6 6

Time Constraints (Must Be Justified in the Prop osal Text) We request observations be scheduled every 30 +/- 3 days starting from the last observation of the previous semester.

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
297-357, 1100-1900 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
Name Ra J0158+21 J0229+20 J0241+14 Dec RiseT 01:58:29.3 02:29:03.2 02:41:45.9 SetT 21:08:11.2 00:36:21 03:22:06 20:58:16.0 01:06:52 03:52:45 16:04:42.6 01:20:31 04:04:29 3


J0244+14 J0608+00 J0628+06 J0824+00 J0848+16 J1010+15 J1807+04 J1821+01 J1945+07

02:44:50.8 06:08:49.3 06:28:04.0 08:24:21.0 08:48:53.2 10:10:00.0 18:07:13.0 18:21:44.0 19:45:54.7

14:27:23.6 00:39:34.9 06:38:27.2 00:27:00.0 16:43:13.3 15:51:40.0 04:06:00.0 01:47:00.0 07:17:39.1

01:25:00 05:34:24 05:23:51 07:52:07 07:27:20 08:49:01 17:12:18 17:38:59 18:39:30

04:06:10 06:44:39 07:33:45 08:58:00 10:11:59 11:32:29 19:03:27 19:05:49 20:53:36

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