GRB 010921: Strong Limits on an Underlying Supernova from the Hubble Space Telescope
Price, Paul; Kulkarni, Shrinivas R; Schmidt, Brian; Galama, T J; Bloom, J S; Berger, Edo; Frail, Dale A; Djorgovski, S G; Fox, Derek B; Henden, A A; Klose, S; Harrison, F A; Reichart, D E; Sari, R; Yost, S A; Axelrod, Tim; McCarthy, P J; Holtzman, Jon A; Halpern, J.; Kimble, Randy A; Wheeler, J Craig; Chevalier, Roger A; Hurley, K C; Ricker, G R; Costa, E; Frontera, F; Piro, L
GRB 010921 was the first HETE-2 gamma-ray burst (GRB) to be localized via its afterglow emission. The low redshift of the host galaxy, z = 0.451, prompted us to undertake intensive multicolor observations with the Hubble Space Telescope with the goal of searching for an underlying supernova (SN) component. We do not detect any coincident SN to a limit 1.33 mag fainter than SN 1998bw at 99.7% confidence, making this one of the most sensitive searches for an underlying SN. Analysis of the...[Show more]
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