MASTER reported an optical transient and possible CV on the 18th of January see http://www.astronomerstelegram.org/?read=6946
After been alerted by Patrick Schmeer on , I have monitored over a few nights on 2 telescopes and uploaded data to the AAVSO after requesting an AUID from VSX and comparison stars.
Results I have to date
Filtered data V
18/1/15 no superhumps visible 13.77 - 13.85 V magnitude B 13.99 R 13.68 I 13.69
19/1/15 developing superhumps of period 0.0579
20/1/15 clouded out
21/1/15 superhump period 0.0552 13.95 - 14.25 V magnitude B 14.28 R 13.89 I 13.91
22/1/15 superhump period 0.0528 14.10 - 14.35 V magnitude B 14.48 R 14.12 I 14.10
Unfiltered data (CV) (higher time resolution)
21/1/15 superhump period 0.0542 14.15 - 14.41 unfiltered magnitude compared to V
22/1/15 superhump period 0.0557 14.3 - 14.55 unfiltered magnitude compared to V
amplitude between 0.2 and 0.3 with superhumps well developed on the 21st and 22nd. Hint of them on the 19th and no sign on the 18th but my dataset was too short to see anything.
Looks to me like a WZ Sge type dwarf nova.
I have been clouded out for a lot of the time, be good for someone to do some time series photometry and possibly spectroscopy though maybe a bit faint for that now.