EGaPS: EVN Galactic Plane Survey -- search for more K-band
calibrators using EVN
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
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.
Team members (in alphabetic order):
- Yuri Kovalev
Astro Space Center LPI, Moscow
- Leonid Petrov
ADNET Systems Inc./NASA GSFC
A paper with results is about to be submitted to Monthly Notices of
the Royal Astronomical Society. A draft of the paper is available
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
Raw listing of the solution statistics is available
Wide-window, high resolution spectra
of 7 maser sources.
Narrow-window, high resolution spectra
of 7 maser sources.
The correlator output
of all scans with time resolution 0.12 s and frequency resolution 125 kHz,
output of scans of 7 water maser sources with time resolution 0.12 s
and frequency resolution 7.8125 kHz, part 1 (25G).
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