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| Spg. | Time interval | No. of | Telescope/ | Source |
| No. | (HJD-2400000) | Spectra | Instrument | |
| A | 34442.6 | 1 | DAO 1.83-m, prism spg. | Underhill (1953) |
| B | 37367.3-39601.3 | 10 | OHP 1.93-m, grating spg. | Delplace (1970b) |
| C | 38310.5-38422.5 | 5 | Merate 1-m, grating spg. | Aydin et al. (1965) |
| D | 38688.0-38743.9 | 4 | DAO 1.22m, grating spg. | van der Wel (1970) |
| E | 39133.6 | 1 | KPNO 2.1-m, grating spg. | van der Wel (1970) |
| F | 43842.5-47922.5 | 57 | Xing-Long 0.6/0.9-m, grating spg. | Guo et al. (1995) |
| G | 44301.6, 44334.6 | 2 | OHP 1.52-m, grating spg. | Andrillat & Fehrenbach (1982) |
| H | 45200.9-49239.6 | 8 | ESO 1.4-m CAT, grating spg. | Hanuschik et al. (1996) |
| I | 45424.2-45952.6 | 8 | Crimean Observatory 2.6-m | Rachkovskaya & Nasibova (1986) |
| J | 45424.3-45452.2 | 23 | Crimean Observatory 1.22-m, grating spg. | Galkina (1985) |
| K | 45606.0-45620.9 | 10 | SPM 2.1-m, grating spg. | Ballereau et al. (1987) |
| L | 47532.5, 47808.5 | 2 | KPNO coude feed, grating spg. | Slettebak et al. (1992) |
| M | 49316.6, 49642.8 | 2 | GI2T spectrograph | Vakili et al. (1998) |
| N | 49592.7-51572.3 | 3 | OHP 1.93-m, ELODIE | Moultaka et al. (2004) |
| O | 48251.2-49471.0 | 10 | Xing-Long 2.16-m, grating spg. | Guo et al. (1995); Guo (1994) |
| P | 48347.6-52725.3 | 23 | ESO HEROS | Rivinius et al. (2006) |
| Q | 51253.5 | 1 | Mt. Abu IR Obs 1,2-m, grating spg. | Banerjee et al. (2000) |
| R | 51850.5-54174.4 | 108 | 0.2-m Schmidt-Cassegrain | Pollmann & Rivinius (2008) |
| S | 53063.5 | 1 | Ritter Observatory 1-m, grating spg. | Wisniewski et al. (2007) |
| T | 40316.3-48176.6 | 39 | Ondrejov 2.0-m, grating spg. | this paper: red phg. spectra |
| U | 46447.6-47159.0 | 32 | McDonald 2.1-m, CCD grating spg. | this paper: CCD spectra |
| V | 49049.3-51486.6 | 36 | Ondrejov 2.0-m, grating spg. | this paper: Reticon spectra |
| W | 51898.4-52727.4 | 7 | Ondrejov 2.0-m, grating spg. | this paper: Heros spectra |
| X | 52204.6-53446.3 | 59 | Castanet-Tolosan 0.212-m and 0.190-m | this paper: Buil CCD spectra |
| Y | 52279.5-54490.4 | 50 | Ondrejov 2.0-m, grating spg. | this paper: CCD700 spectra |
| Z | 53077.8-54443.0 | 18 | DAO 1.22-m, grating spg. | this paper: CCD spectra |
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