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Proposal Identification No.:

A2383

Date Received:

2008-Feb-01 07:48:25

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Extragalactic 42 Hours 1.75 hours

Monitoring a water megamaser in the early universe

We have recently detected a water megamaser in the gravitationally lensed quasar MG0414+0534 at a redshift of z=2.64. This is the most distant water maser known so far. Although first indications might suggest that the maser is associated with a radio jet rather than an accretion disk, the true nature of the maser is far from being understood. While VLBI observation will establish the exact position of the maser, single-dish observations will be crucial to clarify its orign. Here, we propose to monitor the maser line and the continuum emission from MG0414+0534 with the Arecibo 300-m antenna in order to determine if a correlation exists between the line and the continuum flux, hinting at a jet-maser. Furthermore, we aim at searching for systemic and redshifted components that are expected in case of a disk-maser and at constraining any potential velocity drift.

Name Paola Castangia

Institution MPIfR

E-mail pcastang@mpifr-bonn.mpg.de

Phone +49228525380

Student no

Remote Observing Request

X

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

Instrument Setup
C-high Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
1


Frequency Ranges Planned
6066-6166

2