Ubiquitous yet forgotten: Broad absorptions in the optical spectra of low-mass X-ray binaries

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Table A.1.

List of BHs and NSs with confirmed and candidate BA detections.

Name	CO	BA lines	References


GRO J0422+32 (V518 Per)	BH	Balmer, He II−4686	Shrader et al. 1992, 1994, 1997, Bartolini et al. 1994,
			Casares et al. 1995a, Callanan et al. 1995
3A 0620−003	BH	Balmer, He I−4471	Whelan et al. 1977, Ciatti et al. 1977
GRS 1009−45 (N Vel 1993)	BH	Balmer	Bailyn & Orosz 1995, Masetti et al. 1997
XTE J1118+480	BH	Balmer	Torres et al. 2002, Dubus et al. 2001
GRS 1124−684 (N Mus 1991)	BH	Balmer	della Valle et al. 1991, 1998
MAXI J1305−704	BH	Balmer	Charles et al. 2012, Miceli et al. 2024
Swift J1357.2−0933	BH	Balmer, He II−4686	Jiménez-Ibarra et al. 2019b
GRO J1655−40	BH	Balmer	Hynes et al. 1998, Soria et al. 2000
Swift J1727.8−16	BH	Balmer	Mata Sánchez et al. 2024
Swift J1753.5−0127	BH	Balmer, He II−4686	Torres et al. 2005, Rahoui et al. 2015,
			Neustroev et al. 2023
MAXI J1820+070	BH	Balmer	Yoshitake et al. 2024, Garnavich & Littlefield 2018
XTE J1859+226	BH	Balmer	Zurita et al. 2002, Wagner et al. 1999, Welsh et al. 2002
Swift J1910.2-0546	BH	Balmer	Casares et al. 2012, Corral-Santana et al. 2025
AT 2019wey	BHC	Balmer	Yao et al. 2021, Mereminskiy et al. 2022
MAXI J1348−630	BHC	Balmer	Panizo-Espinar et al. 2022
MAXI J1803−298	BHC	Balmer	Mata Sánchez et al. 2022
MAXI J1836−194	BHC	Balmer	Russell et al. 2014


1H 1659−487 (GX339-4)	BH	Hβ (candidate)	Rahoui et al. 2014
GRS 1716−249	BH	Hβ (candidate)	della Valle et al. 1994, Cúneo et al. 2020


EXO 0748−676	NS	Balmer	Crampton et al. 1986, Mikles & Hynes 2012, Pearson et al. 2006
1E 1603.6+2600 (UW CrB)	NS	Balmer	Kennedy et al. 2025, Fijma et al. 2025
3U 1728−16	NS	Balmer	Shahbaz et al. 1996, Cornelisse et al. 2007
SAX J1808.4−3658	NS	Balmer	Elebert et al. 2009
MAXI J1807+132	NS	Balmer	Jiménez-Ibarra et al. 2019a
3A 1822−371	NS	Balmer	Casares et al. 2003
XTE J2123−058	NS	Balmer	Hynes et al. 2001


Aql X−1	NS	Hβ (candidate)	Cornelisse et al. 2007, Panizo-Espinar et al. 2021
MXB 1837+05	NS	Hβ (candidate)	Cornelisse et al. 2013,

Notes. Description of acronyms in the table: CO (Compact object), BHC (BH candidate, not confirmed neither dynamically nor through Hα scaling relations yet).

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