Table A.1.
Multi-epoch FWHM and EW of Hα lines in quiescent BH XRTs
| Object | Telescope | Year | Day | MJD | # spectra | Orbital | FWHM | EW | References |
|---|---|---|---|---|---|---|---|---|---|
| Coverage | ( km s−1) | (Å) | |||||||
| V404 Cyg | WHT | 1993 | 12 Aug | 49212.58 | 6 | 5 % | 1011±52 | 24±2 | 1 |
| WHT | 1994 | 6 & 13-14 July | 49544.50 | 21 | 20 % | 988±101 | 22±3 | 2 | |
| WHT | 1997 | 6-7 Aug | 50668.16 | 4 | 10 % | 1054±53 | 23±2 | 2 | |
| Keck | 1998 | 17 June | 50982.50 | 1a | 5 % | 1067±53 | 24±2 | 3 | |
| WHT | 1998 | 6 & 19-20 July | 51014.90 | 40 | 10 % | 1114±59 | 19±2 | 3 | |
| WHT | 2000 | 10 July | 51736.73 | 2 | 5 % | 1080±56 | 27±3 | 3 | |
| INT | 2002 | 7 July | 52483.69 | 2 | 5 % | 1147±123 | 15±2 | 3 | |
| INT/WHT | 2003 | 1-5 & 8 July | 52824.80 | 19 | 35 % | 1009±84 | 23±4 | 3 | |
| WHT | 2005 | 16-22 Sept | 53634.25 | 23 | 35 % | 1040±80 | 19±4 | 3 | |
| SPM 2.1 m | 2008 | 5-8 July | 54654.74 | 6 | 15 % | 987±58 | 13±4 | 3 | |
| Keck | 2009 | 13 July | 55025.98 | 14 | 5 % | 1063±53 | 25±3 | 4 | |
| After 2015 outburst | |||||||||
| V404 Cyg | NOT | 2016 | 21 Sept | 57653.39 | 2 | 5 % | 954±61 | 14±2 | 5 |
| NOT | 2017 | 20 Sept | 58017.58 | 2 | 5 % | 1036±56 | 20±2 | 5 | |
| NOT | 2018 | 8 Aug & 7 Nov | 58400.71 | 4 | 5 % | 966±49 | 27±3 | 5 | |
| NOT | 2019 | 10 June & 18 Oct | 58704.16 | 4 | 10 % | 1049±55 | 12±1 | 6 | |
| NOT | 2020 | 18 Aug | 59080.44 | 2 | 5 % | 1146±59 | 28±3 | 6 | |
| NOT | 2021 | 21 June | 59370.68 | 2 | 5 % | 1030±58 | 12±1 | 6 | |
| INT | 2022 | 12-18 Aug, 3,5,13-14 Sept & 11 Nov | 59827.31 | 92 | 70 % | 1013±132 | 13±4 | 6 | |
| BW Cir | VLT | 1995 | 3-4 Apr & 3-4 June | 49864.19 | 18 | 30 % | 1096±84 | 53±7 | 3 |
| VLT | 1996 | 24-25 March & 22-23 May | 50169.11 | 14 | 35 % | 1083±85 | 54±10 | 3 | |
| After 1997 outburst | |||||||||
| BW Cir | VLT | 2000 | 22-23 Aug | 51780.16 | 2 | 10 % | 979±53 | 53±5 | 7 |
| VLT | 2003 | 22-23 June | 52814.46 | 13 | 15 % | 1204±37 | 47±3 | 7 | |
| VLT | 2004 | 14-15 & 25-27 Apr | 53142.76 | 42 | 40 % | 990±37 | 60±3 | 7 | |
| VLT | 2006 | 27 Feb, 9,18 & 20-22 March | 53814.40 | 11 | 25 % | 1053±84 | 52±10 | 8 | |
| GX 339-4 | VLT | 2016 | 22 May, 9-10, 12, 14, 30-31 Aug & 3-7 Sept | 57631.90 | 16b | 45 % | 855±52 | 76±14 | 9 |
| XTE J1550-564 | VLT | 2001 | 24-27 May | 52053.78 | 18 | 30 % | 1491±99 | 29±4 | 10 |
| After 2003 outburst | |||||||||
| XTE J1550-564 | Magellan Clay | 2008 | 28 June & 3-4 Aug | 54645.56 | 16 | 30 % | 1419±139 | 29±6 | 11 |
| MAXI J1820+070 | GTC | 2023 | 18-19, 23 July & 15, 17 Aug | 60153.97 | 11 | 60 % | 1678±85 | 75±19 | 6 |
| N. Oph 77 | Victor M. Blanco | 1993 | 23 May | 49131.09 | 1a | 65 % | 1758±88 | 80±8 | 12 |
| Victor M. Blanco | 1994 | 4-6 July | 49539.87 | 1b | 65 % | 2053±109 | 46±5 | 12 | |
| Keck | 1996 | 12 May | 50215.98 | 1b | 20 % | 1764±91 | 79±8 | 13 | |
| Keck | 1996 | 14 July | 50278.87 | 1b | 50 % | 2001±107 | 22±2 | 13 | |
| N. Mus 91 | AAT | 1993 | 25 June | 49164.89 | 2 | 10 % | 1642±96 | 59±7 | 14 |
| NTT | 1994 | 5-7 March | 49419.13 | 13 | 90 % | 1718±77 | 59±4 | 14 | |
| NTT | 1995 | 3-4 April | 49812.21 | 16 | 95 % | 1747±98 | 57±9 | 14 | |
| Magellan Clay | 2009 | 25 April | 54947.47 | 40 | 90 % | 1796±80 | 71±6 | 15 | |
| VLT | 2013 | 12-14, 28 April & 9 May | 56407.04 | 17 | 80 % | 1847±76 | 63±5 | 16 | |
| MAXI J1305-704 | VLT | 2016 | 31 March | 57479.70 | 16 | 95 % | 2350±203 | 33±6c | 17 |
| GS 2000+25 | Keck | 1995 | 22 July | 49920.81 | 1a | 100 % | 2261±117 | 24±3 | 18 |
| WHT | 1995 | 24-26 July | 49925.29 | 1a | 100 % | 2119±121 | 34±4 | 19 | |
| A 0620-00 | WHT | 1991-92 | 31 Dec-1 Jan | 48621.67 | 1b | 90 % | 1921±96 | 61±7d | 20 |
| VLT | 2000 | 6, 16 & 20 Dec | 51889.72 | 20 | 40 % | 1939±69 | 44±12 | 21 | |
| Magellan Clay | 2006 | 14-16 Dec | 54085.67 | 1b | 100 % | 1855±93 | 74±7d | 22 | |
| GTC | 2012 | 5-6 Dec | 56268.18 | 40 | 55 % | 2043±51 | 50±5 | 23 | |
| GTC | 2013 | 7 Jan | 56300.49 | 38 | 80 % | 1894±70 | 69±5 | 23 | |
| GTC | 2018 | 17 Feb | 58167.39 | 12 | 5 % | 1776±92 | 61±7 | 24 | |
| XTE J1650-500 | VLT | 2002 | 10 June | 52436.70 | 1a | 100 % | 1898±121 | 9±2 | 25-26 |
| N. Vel 93 | Keck | 1998-99 | 1 Feb, 5-6 Mar 98 & 22 Jan 99 | 52436.70 | 1a | 70 % | 2055±124 | 63±10 | 27 |
| N. Oph 93 | GTC. | 2020 | 22 June | 59023.53 | 1a | 30 % | 2267±194 | 89±15 | 28 |
| XTE J1859+226 | GTC | 2010 | 17 June & 13 Aug | 55413.55 | 10 | 80 % | 2329±100 | 123±19 | 29 |
| GTC | 2017 | 22-23 July | 57957.88 | 26 | 100 % | 2405±111 | 102±12 | 30 | |
| GTC | 2018 | 20 June | 58290.62 | 2 | 15 % | 2353±120 | 99±11 | 24 | |
| GTC | 2019 | 22-29 & 30-31 Aug | 58725.22 | 10 | 85 % | 2265±169 | 116±22 | 6 | |
| KY TrA | VLT | 2016 | 4 & 7 April | 57484.06 | 6 | 30 % | 2167±185 | 56±18 | 31 |
| GRO J0422+32 | WHT | 1994-95 | 28 Dec 94, 1 & 22 Feb 95 | 49726.18 | 17 | 100 % | 1465±46 | 253±30 | 32 |
| GTC | 2016 | 9 Jan | 57397.49 | 18 | 100 % | 1466±44 | 313±22 | 23 | |
| GTC | 2017 | 28 Nov | 58086.50 | 3 | 20 % | 1562±86 | 282±29 | 6 | |
| GTC | 2018 | 17 Feb | 58167.36 | 2 | 15 % | 1577±81 | 239±24 | 24 | |
| XTE J1118+480 | Keck | 2004 | 14 Feb | 53050.00 | 1a | 100 % | 2555±128 | 72±7 | 33-34 |
| After 2005 outburst | |||||||||
| XTE J1118+480 | GTC | 2011 | 6 Jan | 55568.66 | 25 | 70 % | 2753±93 | 95±11 | 35-36 |
| GTC | 2011 | 7 Feb | 55600.63 | 36 | 95 % | 2643±79 | 103±10 | 35-36 | |
| GTC | 2011 | 24 Apr | 55676.53 | 36 | 100 % | 3015±83 | 69±6 | 35-36 | |
| GTC | 2012 | 11 Jan | 55938.68 | 34 | 95 % | 2716±113 | 80±7 | 36-37 | |
| GTC | 2018 | 17 Feb | 58167.47 | 9 | 35 % | 2480±48 | 85±6 | 24 | |
| Swift J1753.5-0127 | GTC | 2018 | 12 July | 58312.50 | 14 | 95 % | 3592±175 | 166±14 | 38 |
| GTC | 2018 | 13 July | 58313.49 | 14 | 100 % | 3435±140 | 159±23 | 38 | |
| GTC | 2018 | 14 July | 58314.49 | 12 | 100 % | 3499±114 | 171±13 | 38 | |
| Swift J1357.2-0933 | VLT | 2013 | 13, 17 Apr & 3 May | 56402.02 | 24 | 90 % | 4058±144 | 98±13 | 39 |
| GTC | 2013 | 29-30 June | 56473.99 | 4 | 80 % | 4068±433 | 136±15 | 3 | |
| GTC | 2014 | 29-30 Apr, 2-3 & 28 June | 56813.81 | 42 | 100 % | 4200±205 | 107±12 | 40 | |
| MAXI J1659-152 | VLT | 2013 | 6 June | 56449.79 | 1a | 30 % | 3309±361 | 130±23 | 41 |
Notes. (a) Values derived from a single or phase-averaged spectrum. (b) Values derived from a digitised phase-averaged spectrum. (c) Following (17) we have corrected the EW by a 27 per cent contribution of the interloper to the continuum. dEW values have been digitised from a figure of the corresponding paper.
References. (1) Casares & Charles (1994); (2) Casares (1996); (3) Casares (2015); (4) González Hernández et al. (2011); (5) Casares et al. (2019); (6) this paper; (7) Casares et al. (2004); (8) Casares et al. (2009); (9) Heida et al. (2017); (10) Orosz et al. (2002); (11) Orosz et al. (2011); (12) Remillard et al. (1996); (13) Filippenko et al. (1999); (14) Casares et al. (1997); (15) Wu et al. (2015); (16) González Hernández et al. (2017); (17) Mata Sánchez et al. (2021); (18) Casares et al. (1995a); (19) Filippenko et al. (1995); (20) Marsh et al. (1994); (21) González Hernández & Casares (2010); (22) Neilsen et al. (2008); (23) Casares et al. (2022); (24) Casares & Torres (2018); (25) Sánchez-Fernández et al. (2002); (26) Orosz et al. (2004); (27) Filippenko et al. (1999); (28) Casares et al. (2023); (29) Corral-Santana et al. (2011); (30) Yanes-Rizo et al. (2022); (31) Yanes-Rizo et al. (2024); (32) Casares et al. (1995b); (33) González Hernández et al. (2006); (34) González Hernández et al. (2008a); (35) González Hernández et al. (2012); (36) Zurita et al. (2016); (37) González Hernández et al. (2014); (38) Yanes-Rizo et al. (2025); (39) Torres et al. (2015); (40) Mata Sánchez et al. (2015); (41) Torres et al. (2021)
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