Search for GRB afterglows in the ROSAT all-sky survey

Abstract

We report on the status of our search for X-ray afterglows of gamma-ray bursts (GRBs) using the ROSAT all-sky survey 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.

3 pages A&A style, 1 color ps-figure; To appear in A&A Suppl. Series, Proc. of Rome 1998 GRB workshop, also available from http://www.aip.de/~jcg/publis.html

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• Measuring Feedback Using the Intergalactic Medium State and Evolution Inferred from the Soft X-ray Background
• The Luminosity Phase Space of Galactic and Extragalactic X-ray Transients Out to Intermediate Redshifts
• The CFHTLS Real Time Analysis System "Optically Selected GRB Afterglows"
• Beaming Effects in Gamma-Ray Bursts