[vsnet-alert 21484] Re: MASTER OT J205110.36+044842.2 past outbursts and ROSAT ID

Fri Sep 29 20:10:45 JST 2017

This 15.0m optical transient in Delphinus reported
by MASTER team in ATel 10790 (V. Shumkov et al.)
is apparently a dwarf nova, most likely of SU UMa
type. There is ROSAT faint X-ray source formally
17" away, but with a 21" error circle:

1RXS J205111.1+044829
0.0258+/-0.0092 cnts/s HR1=0.82+/-0.24 HR2=0.30+/-0.36
...
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For this identification (and others) see also
https://www.aavso.org/vsx/index.php?view=detail.top&oid=545326

Regards,
Patrick