GZ cnc has a range of 13.1 - 15.4 and at present it looks to be in a superoutburst. Last night it was about magnitude 12.0 which is way above the chart range. The only compasision close to this is 12.9. I know it's not the correct way ask, but any chance of extending the sequence while it is currently in a brighter outburst. Not sure how long it will stay bright!
Regards,
Rod.
Links:
[1] http://www.aavso.org/forums/variable-star-observing/campaigns-observation-reports