Table 2: GRB X-ray afterglow results. For each afterglow, we give the source name, the exposure duration and the net observation duration, together with the results of the spectral and temporal analysis. We quote the absorption (measured at the host redshift or at a value of z=1 when the host redshift is unknown) in excess to the galactic absorption. The X-ray absorption excess upper limits are given at the 90% confidence level. We also indicate the number of detected counts for the source as a proxy of the detection confidence level.
Source Flag Time Exposure Net Detected Temporal Energy Spectral Excess of Flux
name   since burst duration duration count decay spectral fit absorption  
    (days) (ksec) (ksec) number   index $\chi_\nu^2$ (d.o.f.) (1021 cm-2) erg s-1 cm-2
GRB 991216 G 1.52 9.8 9.8 1305 (0.9) 0.7 $\pm$ 0.2 0.94 (56) < 9.6 1.92 $\pm$ $0.08 \times 10^{-12}$
GRB 000210 I 0.84 10.0 10.0 533 1.38 $\pm$ 0.03 0.9 $\pm$ 0.2 1.0 (15) 4.7 $\pm$ 1.3 $2.7 \pm 0.2 \times 10^{-13}$
GRB 000926 I 2.67 10.0 10.0 307 1.9 $\pm$ 0.4 0.7 $\pm$ 0.2 1.5 (8) < 3.4 $1.06 \pm 0.07 \times 10^{-13}$
GRB 001025A X 1.88 40.8 33.4 911 (1.2) 1.8 $\pm$ 0.4 0.90 (13) 6 $\pm$ 3 $2.0 \pm 0.2 \times 10^{-14}$
GRB 011030 I 10.00 50.0 29.6 248 1.9 $\pm$ 0.4 0.7 +2.1-1.0 0.1 (6) < 39 $ 5 \pm 1.2 \times 10^{-14}$
GRB 011130 U 9.77 30.2 30.2 - - - - - ${<}0.6\times 10^{-15}$
GRB 011211 X 0.50 33.6 33.6 3589 2.1 $\pm$ 0.3 1.3 $\pm$ 0.1 1.20 (67) <4.1 $7.3 \pm 0.2 \times 10^{-14}$
GRB 020127 F 4.05 10.0 10.0 26 - - - - $2.1 \pm 0.5 \times 10^{-14}$
    14.53 10.1 10.1 13 - - - - $0.6 \pm 0.2 \times 10^{-14}$
GRB 020321 F? 0.43 50.0 32.0 227 - - - - see text
GRB 020322 X 0.62 29.0 28.4 4226 1.3 $\pm$ 0.3 1.1 $\pm$ 0.1 1.00 (178) 6.5 $\pm$ 0.8 $2.11 \pm 0.05 \times 10^{-13}$
GRB 020405 G 1.68 51.2 51.2 2086 1.6 $\pm$ 0.9 1.0 $\pm$ 0.2 1.24 (75) 5 $\pm$ 2 $8.9 \pm 0.3 \times 10^{-13}$
GRB 020427 F 9.06 13.9 13.9 55 - - - - $1.0\pm 0.2 \times 10^{-14}$
    17.00 14.8 14.8 24 - - - - $0.4 \pm 0.1 \times 10^{-14}$
GRB 020531 U 5.14 20.1 20.1 - - - - - ${<}1.2\times 10^{-15}$
GRB 020813 G 0.86 78.1 78.1 8041 1.4 $\pm$ 0.2 0.83 $\pm$ 0.06 0.93 (364) < 2.9 $1.63 \pm 0.03 \times 10^{-12}$
GRB 021004 G 0.85 88.1 88.1 2656 1.2 $\pm$ 0.3 1.01 $\pm$ 0.07 1.08 (112) < 2.8 $4.0 \pm 0.2 \times 10^{-13}$
GRB 021201 U 8.73 20.0 20.0 - - - - - ${<}1.2\times 10^{-15}$
GRB 030226 I 1.54 40.0 40.0 371 2.7 $\pm$ 1.6 0.9 $\pm$ 0.3 1.1 (10) 6.6 +4.1-3.3 $ 3.6 \pm 0.2 \times 10^{-14}$
GRB 030328 G 0.64 98.1 98.1 1575 1.6 $\pm$ 0.3 1.1 $\pm$ 0.2 0.79 (39) < 4.0 $1.70 \pm 0.08 \times 10^{-13}$
GRB 030329 X 37.04 244.9 143.5 639 (2) 1.0 $\pm$ 0.2 0.98 (22) <0.5 $1.8 \pm 0.2 \times 10^{-14}$
GRB 030528 F 5.97 26.1 26.1 44 - - - - $7.8 \pm 1.3 \times 10^{-15}$
    11.80 20.3 20.3 - - - - - ${<} 3.2 \times 10^{-15}$
GRB 030723 F 2.14 24.8 24.8 76 - - - - $1.4 \pm 0.7 \times 10^{-14}$
    12.69 84.1 84.1 70 - - - - $2.3 \pm 1.7 \times 10^{e-15}$
GRB 031203 X 0.26 112.8 92.2 6261 0.5 $\pm$ 0.1 0.8 $\pm$ 0.1 1.04 (244) 2.6 $\pm$ 0.7 $3.95 \pm 0.08 \times 10^{-13}$
GRB 031220 F 5.62 40.2 40.2 31 - - - - $5.2 \pm 1.3 \times 10^{-15}$
    28.47 19.7 19.7 - - - - - ${<} 1.5 \times 10^{-15}$
GRB 040106 X 0.23 44.6 37.0 15738 1.4 $\pm$ 0.1 0.49 $\pm$ 0.04 1.07 (515) <0.5 $9.1 \pm 0.2 \times 10^{-13}$
GRB 040223 X 0.20 45.2 14.3 1230 0.7 $\pm$ 0.3 1.6 $\pm$ 0.3 1.04 (43) (45-88) $\pm$ 16a $2.3 \pm 0.2 \times 10^{-13}$
GRB 040701 F 7.77 20.0 20.0 68 - - - - $1.2 \pm 0.2 \times 10^{-14}$
    16.50 19.0 17.5 39 - - - - $0.8 \pm 0.2 \times 10^{-14}$
GRB 040812 F 5.04 10.2 10.2 58 - - - - $1.6 \pm 0.3 \times 10^{-14}$
    10.16 10.2 10.2 42 - - - - $1.2 \pm 0.2 \times 10^{-14}$
GRB 040827 X 0.27 52.3 39.3 2899 1.4 $\pm$ 0.3 1.3 $\pm$ 0.1 1.07 (116) 8.6 $\pm$ 1.5 $1.25 \pm 0.04 \times 10^{-13}$

Note: a A high galactic density column affect this observation. See Sect. 4.5 for details.


Source LaTeX | All tables | In the text