Investigating the off-axis GRB afterglow scenario for extragalactic fast X-ray transients

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Volume 690 (October 2024)

A&A, 690 (2024) A101

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Table B.1.

Properties of the sample of distant FXTs from Quirola-Vásquez et al. (2022, 2023).

FXT	z	α₍₁₎	α₂	L_X, peak	T₉₀
				(erg s⁻¹)	(ks)
XRT 000519	0.1866^†	-	-	1.9 × 10⁴⁶	$11 . 6_{- 0.9}^{+ 1.0}$ $11.6_{-0.9}^{+1.0}$
XRT 030511	1.0^†	0.2±0.1	-1.6±0.1	(1.3 ± 0.2)×10⁴⁶	$6 . 5_{- 3.1}^{+ 3.0}$ $6.5_{-3.1}^{+3.0}$
XRT 041230	0.61 $_{- 0.17}^{+ 0.13}$ $_{-0.17}^{+0.13}$	0.2±0.1	-2.0±0.1	(1.1 ± 0.5)×10⁴⁴	$40 . 2_{- 6.7}^{+ 19.7}$ $40.2_{-6.7}^{+19.7}$
XRT 080819	0.7 $_{- 0.10}^{+ 0.04}$ $_{-0.10}^{+0.04}$	0.2±0.2	-2.8±1.9	(1.5 ± 0.7)×10⁴⁵	$8 . 3_{- 1.5}^{+ 4.9}$ $8.3_{-1.5}^{+4.9}$
XRT 100831	1.0^†	0.0±0.1	-2.4±0.4	(4.8 ± 1.8)×10⁴⁵	$4 . 3_{- 1.0}^{+ 7.3}$ $4.3_{-1.0}^{+7.3}$
XRT 110103	0.0216^†	-	-	(2.4 ± 0.2)×10⁴⁴	$40 . 1_{- 5.7}^{+ 6.8}$ $40.1_{-5.7}^{+6.8}$
XRT 110919	1.0^†	0.0±0.1	-1.9±0.2	(3.0 ± 0.7)×10⁴⁵	$17 . 2_{- 10.9}^{+ 50.4}$ $17.2_{-10.9}^{+50.4}$
XRT 140327	1.0^†	-0.2±0.0	-	(6.3 ± 2.8)×10⁴⁴	$13 . 4_{- 3.4}^{+ 7.3}$ $13.4_{-3.4}^{+7.3}$
XRT 141001 (XT1)	2.23 $_{- 1.84}^{+ 0.98}$ $_{-1.84}^{+0.98}$	0.4 ±0.1	-1.6±0.1	(1.7 ± 0.4)×10⁴⁷	$5 . 1_{- 3.1}^{+ 15.0}$ $5.1_{-3.1}^{+15.0}$
XRT 140507	1.0^†	0.4±0.1	-2.9±1.2	(1.0 ± 0.5)×10⁴⁵	$4 . 8_{- 5.5}^{+ 3.6}$ $4.8_{-5.5}^{+3.6}$
XRT 150322 (XT2)	0.738	-0.09±0.1	-2.0±0.3	(2.8 ± 0.6)×10⁴⁵	$10 . 3_{- 6.3}^{+ 9.0}$ $10.3_{-6.3}^{+9.0}$
XRT 151121	1.0^†	-0.3±0.1	-	(6.3 ± 2.6)×10⁴⁵	$5 . 5_{- 4.2}^{+ 1.2}$ $5.5_{-4.2}^{+1.2}$
XRT 161125	0.35^†	-0.5±0.1	-	(1.9 ± 0.8)×10⁴⁷	$2 . 9_{- 2.4}^{+ 0.8}$ $2.9_{-2.4}^{+0.8}$
XRT 170901	1.44	-0.1±0.1	-1.9±0.5	(3.7 ± 0.7)×10⁴⁶	$3 . 9_{- 0.7}^{+ 1.2}$ $3.9_{-0.7}^{+1.2}$
XRT 191127	1.0^†	1.0±0.2	-2.5±0.3	(8.1 ± 3.1)×10⁴⁶	0.3 ± 0.2
XRT 191223	0.85	-0.4±0.1	-	(6.9 ± 3.3)×10⁴⁵	$3 . 7_{- 0.5}^{+ 2.4}$ $3.7_{-0.5}^{+2.4}$
XRT 210423	1.5105	-0.2±0.1	-3.8±1.2	(1.3 ± 0.3)×10⁴⁶	$12 . 1_{- 4.1}^{+ 4.0}$ $12.1_{-4.1}^{+4.0}$

Notes. Content of columns: (1) FXT, (2) redshift, (3) pre-break temporal index (or the single temporal index in case the light curve is best-fit by a simple power law), (4) post-break temporal index, (5) X-ray peak luminosity, (6) duration over which central 90% of Chandra 0.5–7 keV photon counts are detected. Values were taken from Quirola-Vásquez et al. (2022, 2023). The sign of the temporal indices follows from the notation F ∝ t^α.

^† Fiducial redshift.

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