Von: Aurora Sicilia-Aguilar <asa5@st-andrews.ac.uk>
Datum: 13. November 2014 09:58:47 MEZ
An: henning@mpia.de
Betreff: another outburst of ASASSN13db

Dear Thomas,

You may remember the EXor star that the ASAS SN team discovered last
year in Orion, which has impressive emission lines like EX Lupi:

http://adsabs.harvard.edu/abs/2014ApJ...785L..35H

The object has increased by 4 magnitudes in the last 10 days, so it's
again in outburst (V=13.4 as of last night).

I was wondering if it would be possible to observe it with FEROS. Last
year we tried but it was too late (couple of months after outburst) and
the object was already very faint.

During outburst, the star shows the same broad lines that we saw in EX
Lupi, being then a unique case of an EXor. We don't know if it would
have the same kind of velocity modulation we observed in EX Lupi because
to date there is only one high resolution spectrum.

I applied for Xshooter time last call, but I am not sure if I will get
the time and in any case it will be too late to get anything since the
outburst will be most likely over.

I am going to submit a DDT request to Calar Alto, but this will be only
low-resolution.

Best regards,

Aurora

PS: Talking about broad lines and modulations, I am writing up a paper
on EX Lupi accretion columns. I will send a draft to you as soon as it's
ready.