VLA and MERLIN monitoring observations of the gravitational lens system B1030+074

Details VLA and MERLIN monitoring observations of the gravitational lens system B1030+074 VLA and MERLIN monitoring observations of the gravitational lens system B1030+074

2000-12-17

arxiv.org/abs/astro-ph/0012373v1

Astronomy and Astrophysics

Astrophysics

2 pages, 1 figure, to appear in the Proceedings of the ``IAU 2000: New Cosmological Data and the Values of the Fundamental Par

Scientific paper

We present VLA and MERLIN monitoring data of the JVAS gravitational lens system B1030+074. The system was monitored with the VLA from February 1998 to October 1998 at 8.4-GHz during which the VLA was at its A, BnA and B configuration. The 47 epochs of observations have an average spacing of approximately 5 days. Ten MERLIN snapshots were obtained in the L-band (1.7 GHz) during the months of April, May and June 1998. Preliminary light curves of the two components of the lens system obtained from the VLA data indicate that during the period of the monitoring the A flux density showed a steady decrease. No changes are observed in the B light curve.

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