SIMBAD references

M. Henze, W. Pietsch, P. Podigachoski, V. Burwitz, and F. Haberl, Max- Planck-Institut fuer Extraterrestrische Physik; A. Updike and D. Hartmann, Clemson University; P. Milne and G. Williams, University of Arizona; G. Papamastorakis and P. Reig, FORTH and Department of Physics, University of Crete; and A. Strigachev, Institute of Astronomy, Bulgarian Academy of Sciences, write that M31N 2009-11b is visible in twelve 60-s stacked R-band CCD images obtained with the robotic 60-cm telescope of the Livermore Optical Transient Imaging System (Super-LOTIS, located at Steward Observatory, Kitt Peak) at position end figures 39s.61, 03".2 (uncertainty 0".2), providing the following magnitudes: Nov. 1.18 UT, 18.8; 2.18, 19.0; 3.33, 18.4; 6.25, 18.6; 8.25, 18.6; 9.25, 18.6. They note that the position of 2009-11b coincides with both M31N 1997-11k and M31N 2001-12b, which were already classified as a recurrent nova. However, the current outburst was already detected one month earlier in stacked H-alpha images obtained with the 1.3-m Ritchey Chretien f/7.5 telescope at Skinakas Observatory (Crete, Greece) using a broad (7.5-nm) H-alpha filter, yielding the following R magnitudes for 2009-11b: Sept. 27.10, [19.5; Oct. 2.10, faintly visible; 9.10, 18.7. M31N 2009-11b was also detected with the Swift Ultraviolet/ Optical Telescope UVW2 filter (range 112-264 nm), yielding the following ultraviolet magnitudes: June 7.95, 21.2 ± 0.3; Oct. 22.61, 19.0 ± 0.1; 28.29, 18.9 ± 0.1; 31.24, 18.7 ± 0.1; Nov. 3.58, 18.4 ± 0.1. The ultraviolet outburst of the object is clearly connected to the optical outburst, but already detected about 10 days earlier. Due to the earlier start of the outburst in ultraviolet and H-alpha, compared to that in the R-band, and the short recurrence time (4.1 yr), Henze et al. suggest that the outburst could point towards a cataclysmic variable in the Milky Way (U Gem or SU UMa system), noting that similar events have been observed in the direction of M31 in the past and have initially been mistaken for novae (e.g., Sharov and Alksnis 1989, Sov. Astron. Let. 15, 382). A finding chart for 2009-11b from an R-band Super-LOTIS image is available at website URL http://www.mpe.mpg.de/~m31novae/opt/m31/data/finding_charts/nova_R_09_11_07.jpg. Additional details are given at http://www.astronomerstelegram.org/?read=2286.