SIMBAD references

M. Della Valle, Istituto Nazionale di Astrofisica (INAF), Firenze; D. Malesani, International School for Advanced Studies, Trieste; S. Benetti, INAF, Padova; and V. Testa and L. Stella, INAF, Rome, on behalf of a larger collaboration (see Della Valle et al. 2003, A.Ap. 406, L33) report the discovery of an apparent supernova associated with GRB 021211 (Crew et al. 2002, GCN 1734) on four R images obtained on 2003 Jan. 9.7 (R = 24.48 ± 0.18, supernova + host galaxy), 15.33 (R = 25.07 ± 0.15), Feb. 28.02 (R = 25.13 ± 0.12), and Mar. 9.01 UT (R = 25.35 ± 0.17), with the Very Large Telescope (VLT; + FORS2) at the European Southern Observatory. SN 2002lt is coincident with the position of the optical afterglow reported by Fox et al. (2003, Ap.J. 586, L5): R.A. = 8h08m59s.86, Decl. = +6o43'37".5 (equinox 2000.0). Inspection of a 4-hr integrated VLT spectrum obtained on Jan. 8.27 (27 days after the GRB outburst) confirms the redshift of the parent galaxy reported by Vreeswijk et al. (2002, GCN 1785) at z = 1.006 and finds broad, low-amplitude undulations blueward and redward of a broad absorption (FWHM about 15.0 nm), the minimum of which is measured at 377.0 nm in the rest frame of the GRB (the blue wing extends up to 365.0 nm). A comparison with spectroscopic templates of supernovae (arranged by different spectroscopic types) strongly supports the identification of the broad absorption with Ca II H + K, blueshifted by about 15000 km/s. The most convincing resemblance is found with the spectra of the 'prototypical' type-Ic supernova 1994I (Filippenko et al. 1995, Ap.J. 450, L11) obtained between 0 and 40 days after maximum light.