Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/SpitlertagA2675tp.pdf Дата изменения: Thu Oct 13 17:32:24 2011 Дата индексирования: Mon Feb 4 22:27:03 2013 Кодировка:

Proposal Identification No.:

A2675

Date Received:

2011-Oct-03 17:21:24

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: Regular Astronomy Continuum Galactic 6 Hours 90 minutes

A Search for Transient Emission from a 13-minute Detached White Dwarf Eclips-

ing Binary
ABSTRACT:
We propose a search for time-variable radio emission from a detached white-dwarf binary with a 12.75-minute orbit. The ob jects' separation ( 0.1 solar radius) suggests the likelihood of coherent emission analogous to that from the Jupiter-Io system, solar bursts, brown dwarfs, and flare stars by particles accelerated by unipolar induction or from magnetic reconnection. Roche-lobe overflow is not occurring, so the system is clear of dense plasma that would otherwise prevent radio wave propagation. We will search for time variable radiation, including bursts, through analysis of dynamic spectra on time scales from 1ms to the 12.75-minute orbital period. We will ~ use a filter template bank sensitive to a range of frequency modulations, like those seen in flare stars and including interstellar dispersion and scintillation, which will be noticeable if any sub-second emission is detected. We will also search for emission that is synchronized with the orbital period.

Name Laura G Spitler

Institution Cornell University

E-mail lspitler@astro.cornell.edu

Phone 607 255 6420

Student G

Remote Observing Request

X

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

Instrument Setup
L-wide C 327

Atmospheric Observation Instruments:

Sp ecial Equipment or setup: We need the Mock spectrometers working in single-pixel mode with up to four spectrometers spanning 1.2 GHz at C band. 1


RFI Considerations Frequency Ranges Planned

This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz.. This proposal requires coordination with GPS L3 at 1381 MHz.

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