A pilot astrometric survey of 59 northern ICRF radio-sources

In the Bucharest Astronomical Observatory we started an observational program aiming at the improvement of positions for optical counterparts of ICRF radiosources by narrow-field CCD observations and the accurate densification of the optical frame and extension to fainter magnitudes. We also estimat...

Full description

Saved in:
Bibliographic Details
Main Authors: Popescu, Petre, Assafin, Marcelo, Badescu, Octavian, Nedelcu, Dan Alin, Paraschiv, Petre, Iliev, Lubomir, Antov, Alexander
Format: Conference Proceeding
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In the Bucharest Astronomical Observatory we started an observational program aiming at the improvement of positions for optical counterparts of ICRF radiosources by narrow-field CCD observations and the accurate densification of the optical frame and extension to fainter magnitudes. We also estimated the errors in UCAC2, USNO B1.0 and 2MASS catalogs by CCD observations of ICRF sources and we prepared a catalog of intermediary reference stars around ICRF optical counterparts. Comparison with three independent telescope/catalog datasets shows that the precision obtained here represents an important improvement on previous works.
ISSN:0094-243X
DOI:10.1063/1.2993633