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Дата изменения: Mon Apr 19 20:00:08 2004
Дата индексирования: Sat Dec 22 23:14:03 2007
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Proposal Identication No.: A1731 Date Received: 2003-Oct-02 16:48:42
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Continuum
Observation Category: Extragalactic
Total Time Requested: 22 Hours
Proposal Title: Search for diuse supra-cluster synchrotron emission near 330 and 408 MHz in
part of the Great Wall near the Coma Cluster
ABSTRACT:
The diusion of magnetic elds and cosmic rays by collective generations of AGN-jet radio galaxies, and galactic
starburst out ows can be best searched for at lower radio frequencies, where the longer I.C. and synchrotron
lifetimes of the \relevant" CR electrons have had more time (up to 10 9 yr) to diuse from their host galaxies and
mature radio lobes. Evidence for such radiation has already emerged from WSRT and VLA P-band images,
however they are incomplete because the arcmin - to - degree scales of the emission are poorly sampled without the
addition of large single dish observations. The Aricebo telescope is ideal for this this purpose, and we propose 2-D
scans at near 330 MHz and 430 MHz. The 330 MHz images will be combined with earlier WSRT and recent
A+B+C+D conguration data that we have recently taken and calibrated. The 430 MHz images will be combined
with an existing full-synthesis DRAO interferometer image over 7.5 deg. The results will provide images on all
scales at unprecedented sensitivity in these two independent frequency bands.
Name Institution E-mail Phone Student
Philipp P. Kronberg Los Alamos National
Laboratory
kronberg@lanl.gov 505-667-7526 no
Service Observing Request Remot e Observing Request
None X No
X All of the observing run. Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
430 G 327
Atmospheric Observation Instruments:
1

Special Equipment or setup: none
RFI Considerations
Frequency Ranges Planned
This proposal requires coordination with AFTWF within the band 425-435 MHz.
2