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Table 1

Dates, universal times (UT), magnitudes in each filter, duration recorded in the I-band and listed forthe first entry of each flash, temperatures and impactor masses of the first ten NELIOTA flashes.

Flash Date UT R ± σR I ± σI Duration T ± σT Mass (η1) ±σM Mass (η2) ± σM
(mag) (mag) (ms) (K) (kg) (kg)
1a 2017-02-01 17:13:57.863 10.15 ± 0.12 9.05 ± 0.05 33 2350 ± 140 0.6 ± 0.3 0.2 ± 0.1
2_1b 2017-03-01 17:08:46.573 6.67 ± 0.07 6.07 ± 0.06 132 3100 ± 30 4.4 ± 0.5 1.6 ± 0.2
2_2 2017-03-01 17:08:46.606 10.01 ± 0.17 8.26 ± 0.07 1775 ± 100
2_3 2017-03-01 17:08:46.639 9.27 ± 0.10
2_4 2017-03-01 17:08:46.672 10.57 ± 0.15
3b 2017-03-01 17:13:17.360 9.15 ± 0.11 8.23 ± 0.07 33 2568 ± 130 0.9 ± 0.4 0.4 ± 0.1
4c 2017-03-04 20:51:31.853 9.50 ± 0.14 8.79 ± 0.06 33 2900 ± 270 0.4 ± 0.3 0.2 ± 0.1
5d 2017-04-01 19:45:51.650 10.18 ± 0.13 8.61 ± 0.03 33 1910 ± 100 2.3 ± 1.0 0.8 ± 0.4
6_1e 2017-05-01 20:30:58.137 10.19 ± 0.18 8.84 ± 0.05 66 2070 ± 170 1.3 ± 0.9 0.5 ± 0.3
6_2 2017-05-01 20:30:58.170 10.44 ± 0.21
7_1f 2017-06-27 18:58:26.680 11.07 ± 0.32 9.27 ± 0.06 66 1730 ± 210 2.5 ± 2.4 0.9 ± 0.9
7_2 2017-06-27 18:58:26.713 10.80 ± 0.21
8g 2017-07-28 18:42:58:027 10.72 ± 0.24 9.63 ± 0.10 33 2340 ± 310 0.4 ± 0.5 0.2 ± 0.2
9g 2017-07-28 18:51:41.683 10.84 ± 0.24 9.81 ± 0.09 33 2410 ± 310 0.3 ± 0.3 0.1 ± 0.1
10_1g 2017-07-28 19:17:18.307 8.27 ± 0.04 6.32 ± 0.01 165 1640 ± 20 55 ± 19 20 ± 7
10_2 2017-07-28 19:17:18.340 9.43 ± 0.12 7.44 ± 0.02 1620 ± 70
10_3 2017-07-28 19:17:18.373 8.89 ± 0.07
10_4 2017-07-28 19:17:18.406 9.38 ± 0.11
10_5 2017-07-28 19:17:18.439 10.29 ± 0.23

Notes. Multiple entries per flash correspond to the consecutive frames they were detected on. Masses are calculated for both η1 and η2 values (see text for details). The standard stars used for the calibration of each flash are: (a) SA 92−263, (b) SA 93−333, (c) SA 97−345, (d) LHS 1858, (e) 2MASS J09212193+0247282, (f) GSC 04932−00246, (g) GSC 00362−00266.

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