ASAS-SN 17oz an unusual variable

Information about outbursts of eruptive stars, Be activity, ...
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Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
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ASAS-SN 17oz an unusual variable

Post by Robin Leadbeater »

I was alerted by Dr Subo Dong of the ASAS-SN survey team of an object 17oz which is behaving rather oddly. It is was mag 16 star with no record of variability but has been rising steadily over the past few weeks to mag 14. Light curve and details here
https://asas-sn.osu.edu/light_curves/ef ... 7bb4b76730
suggests it may have now peaked.

Here is my ALPY600 spectrum from Saturday night. A rather featureless blue continuum (~A7) with a small H alpha emission line.
Subo is calling for more spectra if possible as it fades.

Cheers
Robin
asas-sn17oz_20171118_880_Leadbeater.png
asas-sn17oz_20171118_880_Leadbeater.png (46.16 KiB) Viewed 3494 times
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Paolo Berardi
Posts: 578
Joined: Thu Sep 29, 2011 10:51 pm

Re: ASAS-SN 17oz an unusual variable

Post by Paolo Berardi »

Hi Robin, congratulations for the observation (it’s a difficult target!), also for the ATel:

http://www.astronomerstelegram.org/?read=10991

Very similar to a dwarf nova profile...

Paolo
Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
Contact:

Re: ASAS-SN 17oz an unusual variable

Post by Robin Leadbeater »

Latest light curve from ASAS-SN, dropping like a stone !
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ASASSN-17oz.png
ASASSN-17oz.png (34.7 KiB) Viewed 3367 times
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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