A big drop in brightness of the transient GOTO065054.49+593624.51. Is it possible?

Guys, tonight I did a few hours time-series on the transient GOTO065054.49+593624.51. The photometry in B and V shows a sharp drop in brightness. The moon is strong, I’ve used exposures of 3 and 5 minutes, the uncertainty averages about 0.07, but the data seems to be reliable. In your opinion, is such a sharp drop possible, has anyone observed it?

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I did a parallel measurement in AIJ (I use VPhot for photometry) and got similar results.

Greetings,

Looking at several ATELs, the system has been identified as either a WZ Sge type accreting binary. These are dwarf novae. The archetype, WZ Sge does exhibit sudden drops and fluctuations in magnitude. So I’d say its certainly possible!

Brian

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Thanks for the clarification, Brian.

This drop in brightness seems to be just the beginning of the end of the superhump, which lasts about 12 days on average (Hellier, Cataclysmic Variable Stars).

Now she is back.

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The LC looks like a WZ Sge type. Some have a series of what are called echo outbursts after the main super-outburst. Keep observing there may be more…

I observed TCP J20315286+2740166 last year and caught at least two echo outbursts following the main super-. Here is a paper discussing the prototype WZ Sge.

Plateaus, dips, and rebrightenings during the outbursts of WZ Sge: no magnetic propeller, but a veiling curtain | Monthly Notices of the Royal Astronomical Society | Oxford Academic

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