Table 1
Journal of observations and estimated magnitudes.
| Date | JD | Instrument | Exp. time (s) | S/N | Magnitude | Comments |
|
|
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| 2007 July 28 | 2 454 309.114 | FEROS | 1600 | 0.7/30/28 | 12.7:1 | Pre-outburst |
| 2007 July 29 | 2 454 310.156 | FEROS | 1800 | 0.3/30/20 | 12.7:1 | Pre-outburst |
| 2007 July 30 | 2 454 311.187 | FEROS | 1800 | 0.2/15/14 | 12.7:1 | Pre-outburst |
| 2008 April 21 | 2 454 577.277 | FEROS | 2400 | 13/220/65 | 9.552 | Outburst |
| 2008 May 5 | 2 454 591.426 | FEROS | 2000 | 1/46/23 | 9.7:1 | Outburst |
| 2008 May 6 | 2 454 592.152 | FEROS | 2000 | 5/90/36 | 9.7:1 | Outburst |
| 2008 May 8 | 2 454 594.360 | HARPS | 2000 | –/32/– | 9.71 | Outburst |
| 2008 June 16 | 2 454 633.084 | FEROS | 2000 | 8/165/51 | 9.61 | Outburst |
| 2010 June 9 | 2 455 356.339 | FEROS | 2000 | 0.1/13/8 | 13.71 | Post-outburst |
| 2010 June 11 | 2 455 358.271 | FEROS | 2000 | 0.2/10/8 | 13.7:1 | Post-outburst |
Notes. Information on the spectroscopy observations. The signal-to-noise ratio (S/N) is measured in three different parts of the spectra (~3650, ~6700, and ~8800 Å). The magnitudes are visual data from AAVSO (marked with (1)) and V magnitude taken with WFI at the 2.2 m telescope in La Silla (marked with (2); Juhász et al. 2012). If no data was obtained on the given day, we interpolated from nearby observations and indicate interpolated observations with “:”. Variations in the S/N between spectra taken at similar brightness of the source are due to weather conditions. The pre-outburst data were presented in Sipos et al. (2009).
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