The database of brightness distributions, correlated flux densities and
images of compact radio sources produced with VLBI
The database contains 35,156 brightness
distributions of 5097 compact radio sources,
mainly active galaxy nuclea (AGN),
generated by analyzing very long baseline interferometry
(VLBI
) surveys — dedicated radioastronomy observations of large lists
of radio sources on networks of radio telescopes spread at distances of
thousand kilometers. The primary database contents is not pictures, but
brightness distribution in a digital form,
specifically in
FITS format,
and calibrated visibility data, which makes it possible to use
this database for scientific work. Derived quantities, such as visualization
of images and estimates of the correlated flux density are also available.
The images were contributed by courtesy of several
authors.
The database can be searched using one
of these methods:
-
Alphabetic list of source J2000-names
-
Search by name
-
Search by position
In addition to brightness distribution, estimates of the correlated flux density
from VLBI experiments for a number of sources are available. Currently, they
are not included in the database and are not searched.
The contents of the database can also
accessible as
Each image is represented with six files:
- the calibrated and edited set of visibility (i.e. cross-correlation
function) points in
FITS format;
- the set of clean components that models the source brightness
distribution in
FITS format;
- the picture of the source image in
Postscript format;
- the plot of dependence of the correlated flux density
on the baseline length in Postscript format;
- the plot of the uv-coverage;
- the table with the total correlated flux density; the median
correlated flux density at baseline lengths less than 900 km,
the median correlated density at baseline lengths greater than
5000 km. For many sources images at more than one epoch, at more
than one frequency bands are available.
The images in
FITS format submitted by authors were pre-processed to
a standardized form. The process of standardization involved: a) assignment
of new names to each file; b) adding 14 new keywords in the FITS headers;
c) removal of lengthy history records; d) generating the pictures and plots
in Postscript format; e) generating the table with estimates of the
correlated flux density.
Authors who contributed images (in alphabetic order)
- Nicholas Corey
- Alan Fey
- Ed Fomalont
- Yuri Y. Kovalev
- Sang-Sung Lee
- Alan Marsher
- Members of the MOJAVE project team: Matt Lister, Dan Homan,
Rene Vermeulen
- Roopesh Ojha
- Leonid Petrov
- Alexandr Pushkarev
- Greg Taylor
- Alet de Witt
Usage policy
The contents of this database is protected by the
GNU Public License. You can download and use the contents of this database for
your personal work. If you would like to reproduce images from this database
in any sort of publications, please ask permission of the image's author.
The author will instruct you how to acknowledge properly his contribution.
You can put a reference to this database or any file from this database in any
electronic or printed document. You are not allowed to make available at your web
site or to distribute by other means derived products, for instance postscript or
gif pictures of any source, without 1) providing valid links to brightness
distributions and calibrated visibilities in FITS-format, 2) without providing the link
to this web-document and proper acknowledgment of the Astrogeo Center Database
of Brightness Distributions, Correlated Flux Densities, and Images of Compact Radio Sources
Produced with VLBI. In a similar way, you cannot distribute compiled executable
software program protected by the GNU Public License without providing its source code.
If you would like to make available at your Web the entire copy of this database
you must ask prior permission from the maintainer.
Back to Astrogeo Center home page.
This web page was prepared by Leonid Petrov
(
)
Last update: 2013.05.13_00:41:05