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Table B.1.

Spectral types and Teff of donor stars in BH LMXBs

Object Porb Spect. Type Method Teff References for
(d) (°K) Spect. Type
GRS 1915+105 33.85(16) K1-5 III NIR SPEC 4241±219 1

V404 Cyg 6.471170(2) G9-K1 III VIS SPEC 4570±110 2
G8-K2 III SED 4570±219 3
K2-4 III NIR SPEC 4242±110 4
SPEC FIT 4800±100 5
4544±48

BW Cir 2.54451(8) G0-5 IV VIS SPEC 5589±201 6

GX 339-4 1.7587(5) K1-2 IV NIR SPEC 4756±60 7

XTE J1550-564 1.5420333(24) K2-4 IV VIS SPEC 4536±160 8

MAXI J1820+070 0.68549(1) K3-5 V VIS SPEC 4645±195 9

N. Oph 77 0.5228(44) K1-5 V VIS SPEC 4810±360 10
K3-5 V a VIS SPEC 4645±195 11
4725±130

N. Mus 91 0.43260249(9) K0-4 V VIS SPEC 4950±330 12
K3-5 V VIS SPEC 4645±195 13
K3-4 V VIS SPEC 4730±110 14
K4-6 V VIS SPEC 4410±210 15
4685±70

MAXI J1305-704 0.394(4) SPEC FIT 4610±145 16

GS 2000+25 0.3440915(9) K3-7 V VIS SPEC 4445±395 17
K3-6 V VIS SPEC 4520±320 18
4485±158

A 0620-00 0.32301415(7) K5-7 V VIS SPEC 4250±200 19
K4-5 V VIS SPEC 4535±85 20
K3-7 V VIS SPEC 4445±395 21
K3-4 V VIS SPEC 4730±110 22
K0-5 V NIR SPEC 4865±415 23
K3-5 Vb SED 4600±200 24
SPEC FIT 4900±100 25
K5-7 V NIR SPEC 4250±200 26
K4-6 Vc NIR SPEC 4410±210 27
SPEC FIT 5000±100 28
4598±45

XTE J1650-500 0.3205(7) K1-7 Vd VIS SPEC 4620±500 29

N. Vel 93 0.285206(1) K0-5 V VIS SPEC 486±415 30
K7-M0 V VIS SPEC 3950±100 31
4407±142

XTE J1859+226 0.276(3) K5-7 V VIS SPEC 4250±200 32
K5-7 V VIS SPEC 4250±200 33
4250±88

GRO J0422+32 0.2121600(2) M0-5 V VIS SPEC 3450±400 34
M0-4 V VIS SPEC 3520±325 35
M1-4 V VIS SPEC 3440±240 36
M4-5 V VIS SPEC 3125±75 37
M0-2 V SED 3700±150 38
3448±70

XTE J1118+480 0.16993404(5) K7-M0 V VIS SPEC 3950±100 39
K5-M1 V VIS SPEC 4065±385 40
K5-9 Ve SED 4165±285 41
SPEC FIT 4700±100 42
K7-M1 V NIR SPEC 3865±185 43
4148±66

SWIFT J1753.5-0127 0.1358(8) M4-5 V VIS SPEC 3125±75 44

References. (1) Harlaftis & Greiner (2004); (2) Casares & Charles (1994); (3) Hynes et al. (2009); (4) Khargharia et al. (2010); (5) González Hernández et al. (2011); (6) Casares et al. (2004); (7) Heida et al. (2017); (8) Orosz et al. (2011); (9) Torres et al. (2019); (10) Remillard et al. (1996); (11) Harlaftis et al. (1997); (12) Remillard et al. (1992); (13) Orosz et al. (1996); (14) Casares et al. (1997); (15) Wu et al. (2015); (16) Mata Sánchez et al. (2021); (17) Casares et al. (1995a); (18) Harlaftis et al. (1996); (19) Oke (1977); (20) Murdin et al. (1980); (21) McClintock & Remillard (1986); (22) Marsh et al. (1994); (23) Shahbaz et al. (1999a); (24) Gelino et al. (2001); (25) González Hernández et al. (2004); (26) Froning et al. (2007); (27) Harrison et al. (2007); (28) Zheng et al. (2022); (29) Orosz et al. (2004); (30) Shahbaz et al. (1996); (31) Filippenko et al. (1999); (32) Corral-Santana et al. (2011); (33) Yanes-Rizo et al. (2022); (34) Orosz & Bailyn (1995); (35) Casares et al. (1995b); (36) Harlaftis et al. (1999); (37) Webb et al. (2000); (38) Gelino & Harrison (2003); (39) Wagner et al. (2001); (40) McClintock et al. (2001); (41) Gelino et al. (2006); (42) González Hernández et al. (2008a); (43) Khargharia et al. (2013); (44) Yanes-Rizo et al. (2025).

Notes. (a) Although (11) report K3-M0, the clear lack of TiO bands in their spectra strongly suggests ≲K5. (b)We adopt an uncertainty of ±1 sub-types on the spectral classification favoured by (24). (c) We adopt an uncertainty of ±1 sub-types on the spectral classification favoured by (26). (d) The spectral type is poorly constrained by (28) because of limited quality spectra and thus we adopt a conservative uncertainty of ±3 sub-types. (e) Following (26) we adopt an uncertainty of ±2 sub-types on the favoured spectral classification.

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