[vsnet-alert 20597] PNV J18580379+1701265: new transient (12.1 mag) in Aquila

[Patrick Schmeer]

PNV J18580379+1701265  (UG:)

Discoverer: Hideo Nishimura (Shizuoka-ken, Japan)

R.A. 18h58m03.79s  Decl. +17°01'26.5"  (J2000.0)
2017 Jan 20.857 UT, 12.1 mag (CCD, unfiltered)

Discovered by H. Nishimura, Shizuoka-ken, Japan,
on three 13-s frames using 200-mm f/3.2 lens +
a Canon digital camera, who writes nothing is
visible at this location on his recent frame
taken on 2017 Jan. 17.860 UT. An image at
http://www.oaa.gr.jp/~oaacs/image/PNinAql.jpg

http://www.cbat.eps.harvard.edu/unconf/followups/J18580379+1701265.html

The bright (FUV= 12.65, NUV= 12.43 mag ->
Previous outburst? Dwarf nova??) UV source
GALEX J185803.7+170125 is only 1.4" from
the transient's reported position.
This UV source is probably identical with
USNO-B1.0 1070-0419935 (18 mag).

Visual magnitude estimate by P. Schmeer, Bischmisheim, Germany:
PNVJ18580379+1701265 20170121.249 122 Scp
Sequence: APASS (V magnitudes)
Instrument: 203-mm SCT

Spectroscopy and time-resolved photometry
of this transient are urgently required.

Clear skies,
Patrick