The nature of the X-ray binary transient MAXI J1834–021: Clues from its first observed outburst

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Volume 699 (July 2025)

A&A, 699 (2025) A114

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Table B.2.

Best fit values of the single spectra with the disc component.

ObsID	Γ	K_nthc×100	kT_seed	kT_disk	K_disk	F₀₅₁₀	χ²
			(keV)	(keV)		(×10⁻¹⁰ erg cm⁻² s⁻¹)	(dof)
6203690102	1.93±0.05	3.501±0.310	0.34 $_{- 0.02}^{+ 0.02}$ ${}^{+0.02}_{-0.02}$	=kT_seed	258 $_{- 35}^{+ 46}$ ${}^{+46}_{-35}$	2.41±0.02	109(96)
6203690104	2.19 $_{- 0.08}^{+ 0.07}$ ${}^{+0.07}_{-0.08}$	4.153±0.564	0.31 $_{- 0.04}^{+ 0.03}$ ${}^{+0.03}_{-0.04}$	=kT_seed	188 $_{- 39}^{+ 40}$ ${}^{+40}_{-39}$	2.08±0.02	72(72)
6203690105	1.88±0.05	3.016±0.270	0.31 $_{- 0.02}^{+ 0.02}$ ${}^{+0.02}_{-0.02}$	=kT_seed	253 $_{- 47}^{+ 68}$ ${}^{+68}_{-47}$	2.02±0.01	114(98)
6203690106	2.09 $_{- 0.12}^{+ 0.09}$ ${}^{+0.09}_{-0.12}$	3.565±0.812	0.27 $_{- 0.10}^{+ 0.05}$ ${}^{+0.05}_{-0.10}$	=kT_seed	307 $_{- 72}^{+ 324}$ ${}^{+324}_{-72}$	1.84±0.03	52(65)
6203690110	1.77±0.07	2.204±0.247	0.33 $_{- 0.03}^{+ 0.02}$ ${}^{+0.02}_{-0.03}$	=kT_seed	202 $_{- 42}^{+ 61}$ ${}^{+61}_{-42}$	1.72±0.02	79(93)
6203690111	1.80±0.06	2.115±0.217	0.30 $_{- 0.03}^{+ 0.03}$ ${}^{+0.03}_{-0.03}$	=kT_seed	201 $_{- 52}^{+ 92}$ ${}^{+92}_{-52}$	1.49±0.01	104(96)
6203690112	1.80 $_{- 0.09}^{+ 0.08}$ ${}^{+0.08}_{-0.09}$	1.852±0.271	0.30 $_{- 0.05}^{+ 0.04}$ ${}^{+0.04}_{-0.05}$	=kT_seed	159 $_{- 52}^{+ 121}$ ${}^{+121}_{-52}$	1.28±0.02	92(83)
6203690113	1.82 $_{- 0.09}^{+ 0.08}$ ${}^{+0.08}_{-0.09}$	1.893±0.328	0.28 $_{- 0.08}^{+ 0.05}$ ${}^{+0.05}_{-0.08}$	=kT_seed	163 $_{- 68}^{+ 403}$ ${}^{+403}_{-68}$	1.24±0.02	92(89)
6203690114	1.71±0.06	1.563±0.168	0.32 $_{- 0.03}^{+ 0.03}$ ${}^{+0.03}_{-0.03}$	=kT_seed	119 $_{- 31}^{+ 54}$ ${}^{+54}_{-31}$	1.21±0.01	100(97)
6203690116	1.62±0.06	1.159±0.125	0.30 $_{- 0.04}^{+ 0.04}$ ${}^{+0.04}_{-0.04}$	=kT_seed	94 $_{- 32}^{+ 70}$ ${}^{+70}_{-32}$	0.95±0.01	103(96)
6203690119	1.51 $_{- 0.14}^{+ 0.09}$ ${}^{+0.09}_{-0.14}$	0.826±0.119	0.25 $_{- 0.08}^{+ 0.10}$ ${}^{+0.10}_{-0.08}$	=kT_seed	148 $_{- 106}^{+ 1018}$ ${}^{+1018}_{-106}$	0.73±0.02	102(79)
6203690120	1.70±0.03	0.994±0.026	<0.18	-	-	0.64±0.01	110(89)
6203690122	1.71±0.04	0.921±0.028	<0.20	-	-	0.58±0.01	88(78)
6203690123	1.65 $_{- 0.07}^{+ 0.10}$ ${}^{+0.10}_{-0.07}$	0.765±0.036	<0.34	-	-	0.51±0.02	61(56)
6203690124	1.26 $_{- 0.20}^{+ 0.14}$ ${}^{+0.14}_{-0.20}$	0.375±0.104	0.34 $_{- 0.17}^{+ 0.15}$ ${}^{+0.15}_{-0.17}$	=kT_seed	21 $_{- 15}^{+ 456}$ ${}^{+456}_{-15}$	0.47±0.02	67(82)
6203690130	1.41 $_{- 0.08}^{+ 0.14}$ ${}^{+0.14}_{-0.08}$	0.269±0.024	<0.80	-	-	0.26±0.01	57(74)
6203690131	1.52 $_{- 0.08}^{+ 0.12}$ ${}^{+0.12}_{-0.08}$	0.307±0.022	0.43 $_{- 0.22}^{+ 0.18}$ ${}^{+0.18}_{-0.22}$	-	-	0.27±0.01	75(84)
6203690134	1.64 $_{- 0.13}^{+ 0.24}$ ${}^{+0.24}_{-0.13}$	0.359±0.037	<0.79	-	-	0.27±0.01	55(59)
6203690135	1.34±0.04	0.272±0.007	<0.38	-	-	0.27±0.01	78(88)
6203690136	1.41 $_{- 0.06}^{+ 0.08}$ ${}^{+0.08}_{-0.06}$	0.288±0.009	<0.60	-	-	0.27±0.01	70(85)
6203690137	1.40±0.04	0.279±0.009	<0.34	-	-	0.26±0.01	58(80)
6203690138	1.32±0.06	0.272±0.015	<0.35	-	-	0.28±0.01	49(62)
6203690139	1.29±0.07	0.306±0.019	<0.47	-	-	0.33±0.02	73(71)
6203690140	1.39 $_{- 0.08}^{+ 0.09}$ ${}^{+0.09}_{-0.08}$	0.312±0.022	<0.31	-	-	0.29±0.02	63(57)
6203690145	1.33 $_{- 0.05}^{+ 0.06}$ ${}^{+0.06}_{-0.05}$	0.217±0.011	<0.44	-	-	0.22±0.01	65(73)
6203690149	<1.70	0.121±0.017	<2.20	-	-	0.09±0.01	48(52)
6203690151	<1.03	0.067±0.009	<2.41	-	-	0.14±0.01	54(58)
6203690152	<1.07	0.093±0.007	<1.10	-	-	0.16±0.01	48(57)
6203690157	1.96±0.02	1.750±0.035	<0.15	-	-	0.87±0.01	119(90)
6203690159	1.71 $_{- 0.13}^{+ 0.11}$ ${}^{+0.11}_{-0.13}$	1.282±0.251	0.35 $_{- 0.05}^{+ 0.04}$ ${}^{+0.04}_{-0.05}$	=kT_seed	97 $_{- 29}^{+ 54}$ ${}^{+54}_{-29}$	1.06±0.02	93(88)
6203690160	1.95 $_{- 0.04}^{+ 0.05}$ ${}^{+0.05}_{-0.04}$	1.951±0.062	<0.28	-	-	0.97±0.02	111(79)
6203690162	1.75 $_{- 0.14}^{+ 0.12}$ ${}^{+0.12}_{-0.14}$	1.333±0.284	0.32 $_{- 0.06}^{+ 0.05}$ ${}^{+0.05}_{-0.06}$	=kT_seed	114 $_{- 44}^{+ 110}$ ${}^{+110}_{-44}$	1.01±0.02	83(81)
6203690163	1.67 $_{- 0.09}^{+ 0.08}$ ${}^{+0.08}_{-0.09}$	1.234±0.165	0.32 $_{- 0.03}^{+ 0.03}$ ${}^{+0.03}_{-0.03}$	=kT_seed	125 $_{- 33}^{+ 56}$ ${}^{+56}_{-33}$	1.04±0.01	84(87)
6203690165	1.64 $_{- 0.13}^{+ 0.11}$ ${}^{+0.11}_{-0.13}$	1.475±0.260	0.28 $_{- 0.05}^{+ 0.05}$ ${}^{+0.05}_{-0.05}$	=kT_seed	284 $_{- 126}^{+ 327}$ ${}^{+327}_{-126}$	1.24±0.03	55(79)
6203690166	1.70 $_{- 0.11}^{+ 0.10}$ ${}^{+0.10}_{-0.11}$	1.270±0.215	0.34 $_{- 0.04}^{+ 0.04}$ ${}^{+0.04}_{-0.04}$	=kT_seed	109 $_{- 31}^{+ 55}$ ${}^{+55}_{-31}$	1.07±0.02	101(88)
6203690169	1.71 $_{- 0.13}^{+ 0.11}$ ${}^{+0.11}_{-0.13}$	1.098±0.221	0.33 $_{- 0.06}^{+ 0.05}$ ${}^{+0.05}_{-0.06}$	=kT_seed	84 $_{- 29}^{+ 65}$ ${}^{+65}_{-29}$	0.88±0.02	85(87)

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