Astron. Astrophys. Suppl. Ser. 138, 441-442

Search for GRB afterglows in the ROSAT all-sky survey

J. Greiner¹ - W. Voges² - T. Boller² - D. Hartmann³

Send offprint request: J. Greiner, jgreiner@aip.de

1 - Astrophysical Institute Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
2 - MPI for extraterrestrial Physics, 85740 Garching, Germany
3 - Clemson Univ., Dept. of Phys and Astronomy, Clemson, SC 29634-1911, U.S.A.

Received December 22, 1998; accepted May 10, 1999

Abstract:

We report on the status of our search for X-ray afterglows of gamma-ray bursts (GRBs) using the ROSAT all-sky survey (RASS) data. The number of potential X-ray afterglow candidates with respect to the expected number of beamed GRBs allows to constrain the relative beaming angles of GRB emission and afterglow emission at about 1-5 hrs after the GRB.

Key words: gamma-rays: bursts -- X-rays: general