[vsnet-alert 20908] PNV J20422233+2712111: new transient (11.1 mag) in Vulpecula

[Patrick Schmeer]

PNV J20422233+2712111  (CV:)

2017 04 13.736 UT
RA 20 42 22.33 DEC +27 12 11.1
11.1 mag (CCD, unfiltered)

"2017 04 13.736
Discovered by H. Nishimura, Kakegawa, Shizuoka-ken,
Japan, using Canon EOS 5D digital camera + 200-mm
f/3.2 lens. Independent discoveries by T, Kojima
(April. 13.743 UT, mag.= 10.5), Gunma-ken, Japan and
by S. Kaneko (April 13.754 UT, mag.= 11.1), Kakegawa,
Shizuoka-ken, Japan. Nishimura writes discovered from
three frames, nothing is visible two recent frames taken
on 2017 April 3.749 and 11.740 UT (limiting mag.= 13).
Kojima writes discovered from three frames, nothing is
visible a recent frame taken on 2017 April 4.779 UT
limiting mag.= 13.5). Kaneko writes discovered from
four frames, nothing is visible a recent frame taken on
2017 April 11.7 UT (limiting mag.= 14.8)."

"2017 04 13.736
Discovery images by Nishimura and Kojima are put at
http://www.oaa.gr.jp/~oaacs/image/PNinVul2017.jpg

http://www.cbat.eps.harvard.edu/unconf/followups/J20422233+2712111.html


The UV source GALEX J204222.4+271210/J204222.5+271211
(NUV= 20 mag) is within 2" of the reported position of the
transient. This UV source is probably identical with the blue
object SDSS J204222.39+271210.9 (SDSS DR7: g= 20.01,
r= 20.12, u= 20.21, i= 20.19 mag; Gaia DR1: G= 20.09 mag).
Several other optical sources are within few arcseconds of
the reported position of the transient.

Spectroscopy and precise astrometry are urgently required.
 
Clear skies,
Patrick