Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/2014Spring/DenevatagP2859.pdf Дата изменения: Fri Sep 6 19:44:27 2013 Дата индексирования: Sat Mar 1 01:01:55 2014 Кодировка: Поисковые слова: m 8

Proposal Identification No.:

P2859 Arecibo Observatory

Date Received: 2013-Aug-30 13:34:34 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 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 40 18 0 1.5 h 100-500 GB

Timing Five Millisecond Pulsars Found in Fermi Unidentified Sources

We propose timing observations over a span of one year of five binary millisecond pulsars found in Fermi gamma-ray unidentified sources. Obtaining ephemerides for these sources will allow us to check for the presence of gamma-ray pulses by folding Fermi photon data. Pulsars emitting in both radio and gamma rays offer a window into the pulsar emission mechanism simultaneously at two different energy bands. Timing observations will also allow us to assess the suitability of these pulsars for inclusion in Pulsar Timing Arrays and tests of theories of gravity. Outreach Abstract: We will study five stars that give off two different types of light invisible to the human eye. One of these types of light is radio waves and the other is gamma rays. The five stars belong to a type called pulsars because they spin very fast (hundreds of times per second) in a manner similar to lighthouses and emit a pulse on each rotation. Observations with the Arecibo telescope will help us understand how pulsars generate the radio waves and gamma rays they emit.

Name Julia Deneva Fernando Camilo

Institution Naval Research Lab Arecibo Observatory

E-mail julia.deneva@gmail.com fcamilo@usra.edu

Phone 607-592-5443 787-878-2612, x361

Student no no

1


Additional Authors
H. T. Cromartie (UNC, hcromart@live.unc.edu, Undergrad), E. Ferrara (GSFC, elizabeth.c.ferrara@nasa.gov), S. Sanpa-Arsa (UVA, ss8dy@virginia.edu, Grad), S. Ransom (NRAO, sransom@nrao.edu), P. Ray (NRL, paul.ray@nrl.navy.mil), M. Kerr (KIPAC, matthew.kerr@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 1700 ­ 2200 ­ ­ ­

Days Needed at This Interval 14

Time Constraints (Must Be Justified in the Prop osal Text) In order of scheduling: 2 gridding sessions: 3.5h and 2.5h (ALFA) Starting at least a week later (L-wide or 327MHz, TBD by the gridding sessions): 3 sessions of 3h each on successive days 1 session of 3h a week later 1 session of 3h two weeks later 11 monthly sessions of 3h each thereafter

2


When PI indicates that superior conjunction times of the eclipsing pulsar J2052+12 can be determined (most likely within the first couple of months of the timing campaign): 2 sessions of 2h each centered on superior conjunction (327MHz, 430MHz, or L-wide; TBD two frequencies different than the frequency used for timing)

Next Semester Time Request

Begin ­ End Interval­Interval 1700 ­ 2200 ­ ­ ­

Days Needed at This Interval 6

Time Constraints (Must Be Justified in the Prop osal Text) One 3 h session per month.

Section I I I - Instruments Needed
430 G L-wide 327 ALFA

Atmospheric Observation Instruments:

Sp ecial Equipment or setup: See description above of constraints on days/sessions requested.

Section IV - RFI Considerations Frequency Ranges Planned
1150 - 1730 302 - 352 422 - 442 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

3


Target List
Source Name Ra(hh:mm:ss.s) Dec(dd:mm:ss.s) RiseTime TransitTime SetTime J1805+06 18:05:54.0 06:14:15.0 17:02:53 18:06:35 19:10:18 J1824+10 18:24:05.0 10:17:27.0 17:10:28 18:24:45 19:39:02 J1909+21 19:09:32.0 21:02:56.0 17:47:14 19:10:09 20:33:04 J2042+02 20:42:19.0 02:49:46.0 19:53:18 20:43:02 21:32:47 J2052+12 20:52:47.0 12:17:51.0 19:35:36 20:53:28 22:11:20

4