V442 And still active

V442 Andromedae was found in emission on the night of august 21st. An outburst occured shortly before that date and is beeing monitored in spectroscopy by a group of astronomers. I have been very lucky with a good weather which allowed myself to acquire lot of spectra of this star:

The spectra show a nice evolution of the double peak emission line since that date:

Here is a daily selection to avoid a too much crowded graph. The emission is still active today even if it is fainter:

Hbeta emission but is now gone:

Measurement of V/R ratio shows this evolution of the Halpha double peak emission with some stable phases and more active/variable ones:

The variations match closely with the photosphere rotation of the star:

A measurement of the HeI 6678 line is by the way showing a nice stellar photosphere rotation period:

The V+R mesurement initially increased, then decreased and is now more stable:

I also measured the distnce between the two peaks. It is now showing a clear increase:

Those measurements are "quick & dirty" ones made automatically using MatLab script. I checked couple of recent measurements as the emission is faint, but it seems to work ok (an offset of 0.75 is substracted on the emission lines):

In summary, I have been very lucky with the weather and the monitoring of V442 And is fun and seems to show some intersting details on this outburst... spectroscopy rocks!