Radio and Optical Follow-up Observations and Improved IPN Position of GRB 970111

Details Radio and Optical Follow-up Observations and Improved IPN Position of GRB 970111 Radio and Optical Follow-up Observations and Improved IPN Position of GRB 970111

1997-07-25

arxiv.org/abs/astro-ph/9707282v1

Astronomy and Astrophysics

Astrophysics

19 pages including 4 figures, Latex, accepted for APJL

Scientific paper

10.1086/310822

We report on Westerbork 840 MHz, 1.4 and 5 GHz radio observations of the improved IPN-WFC error box of the gamma-ray burst GRB 970111, between 26.4 hours and 120 days after the event onset. In the ~ 13 sq arcmin area defined by the IPN (BATSE and Ulysses) annulus and the published refined BeppoSAX Wide Field Camera error box we detected no steady sources brighter than 0.56 mJy (4 sigma), and no varying radio emission, down to 1.0 mJy (4 sigma). We also report on B, V, R and I band observations of the error box with the 4.2 m William Herschel Telescope at La Palma.

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