An optical counterpart to GRB 971227?

¹ Dipartimento di Astronomia, Università di Bologna, via Zamboni 33, I-40126 Bologna, Italy
² LAEFF-INTA, Madrid, Spain, and Instituto de Astrofísica de Andalucía (IAA-CSIC), Granada, Spain
³ Istituto Te.S.R.E., CNR, Bologna, Italy
⁴ Sternwarte der Universität, Bonn, Germany
⁵ Special Astrophysical Observatory, Russia
⁶ Instituto de Astrofísica de Canarias, La Laguna, Spain
⁷ Astrophysikalisches Institut, 14482 Potsdam, Germany
⁸ Landessternwarte Heidelberg, Germany
⁹ Max-Planck-Institut für Astronomie, Heidelberg, Germany
¹⁰ Istituto di Astrofisica Spaziale, CNR, Frascati, Italy
¹¹ Dipartimento di Fisica, Università di Ferrara, Italy
¹² IFCAI, CNR, Palermo, Italy

Received: 29 December 1998
Accepted: 3 May 1999

Abstract

Observations taken at Calar Alto and Loiano led to the possible identification of the GRB 971227 optical counterpart. Details on the observations are presented.