EGaPS: EVN Galactic Plane Survey -- search for more K-band calibrators using EVN

Objectives of the campaign
People
Results

Text of the proposal in PDF format,

Objectives of the campaign

A 48 hour observing session with the European VLBI Network at K-band (22 GHz) for observing 369 radio candidate source was run on 2009.10.27—2009.10.29. The goal of the experiment was to increase the number of compact extragalactic radio sources useful as calibrators near the Galactic plane for supporting VERA and VLBA experiments focused on the study of galactic objects. Previous observations with the VLBA in 1994--2009 in S/X produced a list of 4337 sources, with position accuracy better than 5 mas and with S/X images. However, the density of this catalogue is not sufficient to provide enough calibrators closer than 2° near the Galactic plane for VERA and VLBA observations of many interesting galactic objects. VERA observations, in particular, critically depends on availability of calibrators within 2°.2 of a target source.

People

Team members (in alphabetic order):

Yuri Kovalev Astro Space Center LPI, Moscow

Leonid Petrov ADNET Systems Inc./NASA GSFC

Results

A paper with results is about to be submitted to Monthly Notices of the Royal Astronomical Society. A draft of the paper is available here.

Of 369 target sources, 109 has three or more detections. We have determined their positions and estimated correlated flux densities. The correlated flux densities of detected sources are in the range of 20 to 300 mJy. The median position uncertainty is 9 mas. We also detected 9 water masers, two of them new. We determined position of masers with accuracies 30–200 mas, determined velocities of maser components and their correlated flux densities.

The catalogue of 109 target sources is available here.

Raw listing of the solution statistics is available here.

Wide-window, high resolution spectra of 7 maser sources.

Narrow-window, high resolution spectra of 7 maser sources.

Raw data

The correlator output of all scans with time resolution 0.12 s and frequency resolution 125 kHz, (232G).

The correlator output of scans of 7 water maser sources with time resolution 0.12 s and frequency resolution 7.8125 kHz, part 1 (25G).

The correlator output of scans of 7 water maser sources with time resolution 0.12 s and frequency resolution 7.8125 kHz, part 2, (10G).

This page was prepared by Leonid Petrov ()
Last update: 2011.04.30_23:58:38