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MV Lyr fading

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garypoyner's picture
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Last seen: 2 days 12 hours ago
Joined: 04/03/2014 - 15:40
MV Lyr fading

Some observers might be interested to know that the Nova like VY type star MV Lyr is currently fading.   Currently at magnitude 13.8, it has slowly faded from maximum of 12.5 over the past couple of months.   Depths of fade vary between 3 and 6.5 magnitudes.  The last fade (to mag 18.5CV) occured in the Summer of 2015.

Might be an interesting one for those spectroscopists found lurking in the VS forum pages, as well as visual and CCD observers.

A chart and sequence can be obtained from the AAVSO VSP

Gary

Robin Leadbeater's picture
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Last seen: 9 hours 35 min ago
Joined: 05/03/2014 - 00:50
a preliminary spectrum

Despite poring over the radar maps looking for gaps between the rain showers I have only managed 10 min on this so far.

Only the Balmer lines in emission are clear in the noisy spectrum but it does perhaps seem to be intermediate between the low and high state spectra in the literature. Here for example in the high state from  L. Rosino et al 1993 PASP 105 51

and the low state (blue end only) from Voikhanskaia, N. F. 1988, A&A, 192, 128  

(Both low state spectra, showing interesting variation during the 0.13 day orbit)

Cheers

Robin