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Table 1

Basic parameters of the two bursts (some information from Kuulkers et al. 2010 and in’t Zand et al. 2011).

Parameter 4U 0614+09 2S 0918-549

Time (MJD) 51 944.91157 54 504.12698
Date 2001-Feb.-04 2008-Feb.-08
RXTE ObsID 50031-01-03-05 93416-01-05-00
PCUs 0,1,2,3 0,2
Fluence (erg cm-2) 3.17 × 10-5 1.90 × 10-5
Rad. energy outp. (erg) 3.4 × 1040 7 × 1040
Peak flux (erg cm-2 s-1) 2.66 × 10-7 1.18 × 10-7
Timescale (s)a 120 160
Precursor durationb (ms) 43 ± 1 32 ± 1
Superexpansion duration (s) 1.15 ± 0.01 1.25 ± 0.01
Touch-down point (s) 75 ± 5 75 ± 5
Ignition column depth (g cm-2) 8 × 109 (1–2) ×1010
Bol. pers. flux (erg cm-2 s-1) 3.77 × 10-9 5.5 × 10-10
(1.4% of peak flux) (0.5%)

Notes.

(a)

The timescale is defined as the fluence divided by peak flux (see Galloway et al. 2008);

(b)

The precursor duration is measured between the times that the precursor rises above and decays below 5% of the peak flux in the full PCA bandpass.

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