Astron. Astrophys. Suppl. Ser. 138, 457-458

An optical counterpart to GRB 971227?

A. Guarnieri¹ - A.J. Castro-Tirado² - C. Bartolini¹ - M. Lolli¹ - N. Masetti³ - A. Piccioni¹ - F. Zavatti¹ - J. Gorosabel² - Y. Aguilar⁴ - R. Kohley⁴ - G.M. Beskin⁵ - M.R. Zapatero-Osorio⁶ - R. Rebolo⁶ - R. Corradi⁶ - M. Guerrero⁶ - S. Kemp⁶ - J. Greiner⁷ - M. Dietrich⁸ - F.J. Zickgraf⁹ - E. Costa¹⁰ - M. Feroci¹⁰ - F. Frontera¹¹ - L. Piro¹⁰ - L. Nicastro¹² - E. Palazzi³

Send offprint request: adriano@astbo3.bo.astro.it

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 December 29, 1998; accepted May 3, 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.

Key words: gamma-rays: bursts