The omnipresent flux-dependent optical dips of the black hole transient Swift J1357.2−0933

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Volume 682 (February 2024)

A&A, 682 (2024) A19

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Table A.1.

Log and spectral results of Swift/XRT observations during the 2021 outburst of J1357.

Obs. ID^§	Start date	Exp.	Net count rate	Γ	F_X, abs (0.5-10 keV)^†	F_X, unabs (0.5-10 keV)^†	/ d.o.f.^‡
	(MJD)	(ks)	(counts s⁻¹)		(10⁻¹² erg cm⁻² s⁻¹)	(10⁻¹² erg cm⁻² s⁻¹)
00031918101	59320.06	0.81	0.004	1.3 (fix)	< 0.52	< 0.52	-
00031918102	59320.71	1.63	0.007	1.3 (fix)	< 0.65	< 0.65	-
00031918104^[#1-2]	59325.36	0.95	0.065	1.3±0.4	4.15±0.19	4.18±0.19	0.62/7
00031918105	59327.36	0.58	0.053	1.3 (fix)	< 3.90	< 3.92	-
00031918106	59332.75	0.88	0.067	2.1±0.4	2.54±0.09	2.57±0.09	0.05/6
00031918107	59334.60	0.95	0.075	1.9±0.3	2.75±0.09	2.78±0.1	0.64/9
00031918108	59335.32	0.89	0.100	2.0±0.3	3.23±0.08	3.28±0.08	1.19/12
00031918109^[#3]	59336.52	0.89	0.065	2.0±0.3	2.87±0.09	2.91±0.09	0.8/7
00031918110	59337.65	0.59	0.079	1.6±0.3	3.48±0.1	3.50±0.1	0.82/6
00031918112	59339.38	0.89	0.077	2.0±0.3	2.83±0.08	2.87±0.08	0.62/9
00031918115^[#4]	59345.41	0.90	0.073	1.5±0.3	3.74±0.11	3.76±0.11	1.52/9
00031918116	59346.34	0.92	0.079	1.8±0.3	3.26±0.1	3.30±0.1	0.68/10
00031918117	59347.27	0.57	0.101	1.9±0.3	3.72±0.09	3.77±0.09	0.89/8
00031918118	59349.54	0.62	0.050	1.9 (fix)	< 2.51	< 2.54	-
00031918119	59356.30	1.01	0.062	1.8±0.3	3.72±0.10	3.76±0.10	0.78/8
00031918120^[#5]	59363.48	1.07	0.050	2.2±0.5	1.43±0.14	1.45±0.13	1.36/5
00031918121^[#6]	59369.45	0.85	0.014	2.2 (fix)	< 0.74	< 0.75	-
00031918122	59387.56	1.01	0.005	2.2 (fix)	< 0.34	< 0.34	-
00031918123	59388.69	1.00	0.005	2.2 (fix)	< 0.34	< 0.35	-
00031918124	59389.43	0.77	0.003	2.2 (fix)	< 0.26	< 0.27	-
00031918125^[#7]	59390.22	0.92	0.003	2.2 (fix)	< 0.27	< 0.28	-

^§

Notes. LT epochs are indicated in brackets for those X-ray epochs closest in time to the optical data set.

^†

F_X, abs and F_X, unabs represent the absorbed and unabsorbed X-ray fluxes (0.5-10 keV), respectively.

^‡

and d.o.f. represent the reduced χ² and the degrees of freedom, respectively.

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