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Proposal Identification No.:

A

Date Received: ARECIBO OBSERVATORY NATIONAL ASTRONOMY AND IONOSPHERE CENTER OBSERVING TIME REQUEST COVER SHEET

2007-Feb-01 12:07:16

Mail hard copies to: Dr. Tim Hankins, Interim Director Arecibo Observatory HC 3 Box 53995 Arecibo, PR 00612 U.S.A.

We are indebted to our user community for their continued support of the Arecibo Observatory, Puerto Rico.

Section I - General Information
Submitted for Feb 1 2007. This proposal has not been submitted before. Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Expected Data Storage: Prop osal Title: ABSTRACT: Regular Astronomy Continuum Galactic 7.5 Hours 100-500 GB

Full Stokes 327 MHz Continuum Observations of the GALFACTS Pilot Region

The GALFACTS (GALFA Continuum Transit Survey) continuum-polarization pilot program used both the L-Band Wide (Program A1863) and ALFA (A1947) receivers. For each of these, an area of 10 deg x 1 deg was imaged in full-Stokes mode. The resultant polarization images (band-averaged Stokes Q and U) reveal rich structure which is not reflected in the Stokes-I image. We now propose to observe the full-Stokes continuum emission within this region at 327 MHz using the Arecibo telescope. Combining the proposed new observations with the above L-band images (smoothed to the 327-MHz resolution) would allow decomposition of the spectacular polarization structure as a function of Farady depth (i.e. Rotation Measure) using Faraday Tomography. This will reveal the distributions of both the diffuse non-thermal emission and the magneto-ionic medium along the line-of-sight. We request 10 hours (5 x 1.5 hours) of telescope time for these meridian NODding scan observations.

Name Wasim Ra ja

Institution Raman Research Institute Raman Research Institute

E-mail wasim@rri.res.in

Avinash A Deshpande

desh@rri.res.in

Phone +91-8023610122 (ext. 240) +91-8023610122 (ext. 236)

Student G

no

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Additional Authors
Andrew R Taylor (e-mail:russ@ras.ucalgary.ca) Department of Physics and Astronomy, University of Calgary 2500 University Dr. N.W. Calgary, Alberta­T2N 1N4 Tapasi Ghosh (e-mail:tghosh@naic.edu) NAIC Arecibo Observatory HC3 BOX 53995 Arecibo, PR 00612 Chris Salter (e-mail:csalter@naic.edu) NAIC Arecibo Observatory HC3 BOX 53995 Arecibo, PR 00612

I will not need financial support. This work is part of a PhD thesis.

Remote Observing Request

X

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

Section I I - Time Request
The following times are in LST.

Begin ­ End Interval­Interval 06:15 ­ 07:45 ­ ­ ­

Days Needed at This Interval 5

Time Constraints (Must Be Justified in the Prop osal Text)

Section I I I - Instruments Needed
327 Atmospheric Observation Instruments:

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Sp ecial Equipment or setup:

none

Section IV - RFI Considerations Frequency Ranges Planned
312-342

Section V - Observing List Target List
"The 10 deg x 1 deg area imaged via the GALFACTS precursor proposals A1863 and A1947. This is centred at R.A. = 07h 08min; Declination = 11deg 30'."

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