[vsnet-alert 22463] Re: ASASSN-18tf / short period WZ Sge star?

[bmonard at mweb.co.za]

It's not known when the outburst exactly started (in the period 21-27 aug) but ASASSN-18tf showed superhumps last night with amplitude 0.3 mag around a mean magnitude of 15.84CR. A preliminary period of 0.0680d (+/- 0.0002) was derived.

The transient was observed continuously over a period of 0.2d (JD 8360.27-8360.47) at CBA Kleinkaroo  under good observing conditions and a 2/3 moon.

In view of a 6 mag outburst magnitude, this transient is expected to be a WZ Sge type dwarf nova.

Further observations are intended.

Berto Monard / CBA Kleinkaroo
 

----- Original Message -----
From: "Kojiguchi Naoto" <kojiguchi at kusastro.kyoto-u.ac.jp>
To: vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp, vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp
Sent: Wednesday, August 29, 2018 7:51:45 PM
Subject: [vsnet-alert 22454] ASASSN-18tf

ASASSN-18tf

    Large outburst amplitude.

ASASSN-18tf  --- ------- 19:57:41.23 -8:24:55.2 2018-08-28.13 15.39 
-------  CV candidate, matches to PS1 g=21.8, g>17.6 on 2018-08-21.01, 
g=15.7 on 2018-08-27.01, g=15.8 on 2018-08-28.13.

ASASSN-18tf 20180821.01 <176g ASN
ASASSN-18tf 20180827.01 157g ASN
ASASSN-18tf 20180828.13 158g ASN