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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2434 SUBJECT: SN 2003jd (SN/GRB?) - possible association with GRB 030929 DATE: 03/10/29 21:05:27 GMT FROM: Avishay Gal-Yam at Tel Aviv U, Israel <avishay@wise1.tau.ac.il> E. O. Ofek, D. Poznanski, A. Gal-Yam and Y. Lipkin (Wise observatory, TAU) report: We searched the list of IPN error-boxes derived for GRBs detected between September 15 and October 28 2003, for a spatial coincidence with SN 2003jd (Burket, Swift and Li, 2003; IAUC 8232), which is spectroscopically similar to SNe 1998bw and 2003dh, associated with GRBs 980425 and 030329, respectively (Filippenko, Foley, and Swift 2003, IAUC 8234; Matheson et al. 2003, IAUC 8234, GCN 2431). We find that the position of SN 2003jd falls within the 3-sigma preliminary error annulus of the short/hard GRB 030929 (Hurley et al. 2003; GCN 2409) detected by Konus-Wind and INTEGRAL (SPI-ACS). Since the total area of IPN 3-sigma error-boxes and annuli derived between Sep. 15 and Oct. 28 2003 covers 5.6% of the entire sky, and the reported error annulus is preliminary, this coincidence may well be by mere chance. We also note that GRB 030929 is a short, hard burst, while previous events associated with SN 1998bw-like SNe Ic were of the long, soft variety. Additionally, if SN 2003jd is associated with GRB 030929, the SN rise time (~30 days) is somewhat longer than observed in previous cases (e.g., ~17 days, for SN 1998bw). Further inspection of the relevant IPN data may shed more light on this possible association.
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