VLBI global solution rfc_2021d
Astrometric global solution rfc_2021d used all available VLBI observations
at 8.6GHz and 2.2 GHz, as well at 5 and 22GHz from 1980.04.11 through
2021.12.07, in total 7865 observing sessions, including
969 observing sessions of 63 dedicated
absolute astrometry programs.
In total, 20,838,075 estimates of group delays were used in
LSQ solutions.
Positions of 20,250 sources were adjusted in 5 least square solutions
for X/S and X/C, X-band, S-band, C-band, and K-band solutions. This
is the most complete catalogue of positions of compact radio sources.
Technical description of the solution is available
here.
The contents of this web page and following links contain unpublished
material. The material is provided as a courtesy for preview. Using this
material in publications, copying, and posting on Internet is not allowed
without written prior permission.
Astrometric Results
-
rfc_2021d catalogue in
HTML form (58 Mb). NB: loading the catalogue
takes time, please be patient. The catalogue contains source
positions, their uncertainties, estimates of the total VLBA flux
density, the VLBA flux density of unresolved components, naturally
weighted CLEAN images in postscript and in fits format at X and
S-band; plots of the correlated flux density as a function of the
length of the baseline projection to the source plane; fits files
with calibrated uv data. Images and estimates of
correlated flux densities are available for 17,408 sources from this
catalogue.
-
rfc_2021d catalogue in ASCII format.
(3 Mb)
The catalogue contains source positions, their uncertainties,
total VLBA flux density, the VLBA flux density of unresolved
components.
-
rfc_2021d catalogue in key-format
format. The catalogue contains source positions.
This catalogue can be used as a priori file for
VLBI SCHED scheduling software package.
-
rfc_2021d catalogue in blokq
format. The catalogue contains source positions and
their uncertainties. This catalogue can be used as a priori
file for library VTD and
VLBI analysis software package Post-Solve.
- Interactive
VLBI calibrator search tool among sources in the rfc_2021d
catalogue.
Observing campaigns statistcs
- Brief campaign description
- Statistics of the number of sources observed and
detected per campaign.
- List of sources that were observed only
in a given campaign
- List of campaigns a given source was observed
- Statistics of detections per campaign
Astrophysics Information
-
126,815
Images and calibrated uv data
for
20474
compact sources at S, C, X, U, K, Q, and W bands in one compressed
tar.bz2 file is available
(157 Gb). For many sources images for more than one epoch are available.
-
Single dish spectrum
for 17,352 sources from
published results determined with the use of the
CATS database. NB: the estimates of
flux density are NOT simultaneous. Since the majority of sources are
variable, these estimates of the spectrum are not always reliable.
Estimates of spectrum for some sources may be wrong due to errors
in the database of singe dish flux measurements.
Geophysics Results
Station positions and velocities
Positions of 203 stations and their velocities were estimated as global
parameters. Station positions are given on epoch 2000.01.01.
Boundary conditions were selected in such a way that source positions,
station positions and velocities are compatible with USNO series of the
Earth orientation parameters
finals.all and
finals.daily.
Antenna axis offsets
Antenna axis offsets from LSQ estimation
rfc_2021d.axof
Earth orientation parameters
Pole coordinates X, Y, UT1 angle, and their rate, daily correction to the
nutation in longitude and nutation in obliquity were estimated for each
session separately.
Statistics
Miscellaneous
Usage policy: you can download files for research purposes, you can put links
to this Web page, but you cannot post any part of content of this Web
page on ftp or http servers without prior written permission from authors.
Acknowledgments
The use of Very Long Baseline Array
(VLBA) data is acknowledged. VLBA is operated by the National Radio Astronomy
Observatory, which is a facility of the National Science Foundation, and operated
under cooperative agreement by Associated Universities, Inc. The use of the VLBA under
the US Naval Observatory's time allocation is acknowledged. This work supports USNO's
ongoing research into the celestial reference frame and geodesy. These data were
retrieved from the VLBA public archive.
The use of Long Baseline Array
(LBA) data
is acknowledged. The LBA is a part of the Australia Telescope National Facility
which is funded by the Commonwealth of Australia for operation as a National
Facility managed by CSIRO.
The use of European VLBI Network
(EVN) data is acknowledged.
The European VLBI Network is a joint facility of independent European, African,
Asian, and North American radio astronomy institutes.
The use of Korean and VLBI Exploration for Astrometry VLBI Networks
(KVN and KaVa) data
The KVN and VERA are operated by the the Korea Astronomy and Space Science
Institute and the National Astronomical Observatory of Japan.
Back to Astrogeo Center home page.
Web page was prepared by Leonid Petrov
(
)
Last update: 2022.01.02_09:12:18