SS Aur in outburst

[Francois Teyssier]

The cataclysmic star SS Aur has been detected in outburst
RA = 06 13 22.4
DE = +47 44 25
Mag V ~ 10.5 to 11

[Peter Somogyi]

It was an edge case to guide on slit (1.5 sec) from which I'd estimate between 11.5 - 12 mag:

_ssaur_20150207_711_psomogyi.png (29.02 KiB) Viewed 10652 times

[Joan Guarro Flo]

The star SS Aur evolved ....

J.Guarro

[Francois Teyssier]

Very nice spectra Peter & Joan,
More spectra should be interesting to follow the evolution
Published series of CV outburts are very scarce
François

[Peter Somogyi]

It was a very hard capture this time, for various reasons:

The object was very low in the end, had breaks for technical difficulties (usb moved, focus shift) and this is a sum of all the 3 parts.

[Joan Guarro Flo]

Very Good !! Peter.

Joan.

[Francois Teyssier]

This is a fantastic spectrum Peter !
Difficult and very interesting.
The emission spectrum of the cv near quiescence, with the lines of He I + Fe II well developped.
Congratulations ?

Do you want to prepare a graph for the next letter with the 4 spectra of the data base ? (700 x 1000 pixels) - Should be a must.

Cheers,

François

PS : the Lihres is ready now, sorry for the delay

[Peter Somogyi]

Thank you Joan and Francois, I will prepare a series graph then.
So far we have only 3, big question if someone could do a 4th some more days later (I'm a weekend observer).

All the best,
Peter

[Peter Somogyi]

Saturday and Sunday (probably the last from me), further blue continuum drop:

Notice on technical difficulties, not to do same mistake by others:
- Saturday's run just took 2 hours, in perfect conditions
- Sunday I was careless, first 1-2 hours while Newton + environment cooling down had terrible seeing (= usual local effect here), and then I didn't adjust the star on the slit (when star become smaller, its middle got defined - became visible that not perfectly on the slit...and some rotation) Result: thrown out / underweigthed hours of exposures in the last sum. Only 7 x 20 minute was optimal.

[Joan Guarro Flo]

Congratulations Peter !! Your observations are 3 hours and 20 minutes, the effort gives very good results.

The star is the 14th magnitude, try to test your system, see what happens ...

Joan.