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Request for spectra - ASASSN-18abl (at2018jsc)

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Robin Leadbeater's picture
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Request for spectra - ASASSN-18abl (at2018jsc)

I have had a request for spectra of this star from Prof Subo Dong of the ASSASN team.  This star was not thought to be variable but has brightened by suddenly by ~3 mag to ~ mag 12. I plan to try tonight but I have thin high cloud currently.

https://wis-tns.weizmann.ac.il/object/2018jsc

http://www.cbat.eps.harvard.edu/unconf/followups/J03005508+1802290.html

An image here

http://meineko.sakura.ne.jp/ccd/TCP_J03005508+1802290.jpg

Robin

Robin Leadbeater's picture
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spectrum

 An ALPY 600  spectrum in poor conditions (thin cloud) shows a blue continuum, weak H beta and gamma in absorption and no detectable H alpha

David Boyd's picture
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TCP J03005508+1802290 aka ASASSN-18abl

LISA spectrum, 4500 sec integration, very similar to Robin's above.

According to a recent email to the CBA group by Tonny Vanmunster reporting observation of superhumps, it is a probably an AM CVn type dwarf nova.

David