[vsnet-outburst 22221] PNV J15384000-4744500: possible nova (9.0 mag) in Lupus

Mon Jun 4 03:42:40 JST 2018

PNV J15384000-4744500  (N:)

R.A. 15h38m43.84s, Decl.-47°44'41.07" (J2000.0) (S. Kiyota)
2018 June 3.4306 UT, 9.1 mag (CCD, unfiltered)
Discoverer: Rob Kaufman (Bright, Victoria, Australia)

2018 06 03.4306 UT
Object discovered by Rob Kaufman (Bright, Victoria, Australia)
at White Cliffs, NSW, Australia; object visible in 5 DSLR frames
taken with 55mm lens. Position approximate - astrometry required.
No minor planets or comets at this position, nor known variables
in VSX. Last ASAS-SN observation 22 May 2018, nothing to 15.697 V.
Discovery image here:
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNV%20J15384000-4744500%20discovery%20image.jpg~original

2018 06 03.5670 UT
Photometry results were B=9.69, V=8.98, Rc=8.60 and Ic=8.19 with
iTelescope T17 (0.43-m f/6.8 CDK astrograph + FLI PL4710 CCD) at
Siding Spring Observatory, NSW, Australia. Position end figures
were 43.84 and 41.07 in R.A. and Dec. Low resolution spectrum,
taken with same telescope, might show Ha emission but not
significant.
http://meineko.sakura.ne.jp/ccd/PNV_J15384000-4744500.jpg
Seiichiro Kiyota (Kamagaya, Japan)

2018 06 03.63 UT
A Gaia DR2 star of magnitude 19.36 G is 1.0" from the position
reported by Kiyota-san; another designation for this star is
GSC2.3 S8TZ090424 (15 38 43.898 -47 44 40.87; F= 17.55, Bj= 20.19,
N= 17.70 mag). No previous outbursts or eruptions were recorded by
the ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and
Kochanek et al. 2017PASP..129j4502K) since 2016 March; the latest
available observation is 2018 May 22.2374 UT, fainter than
magnitude 15.8 V:
https://asas-sn.osu.edu/light_curves/599236bc-d453-4a7e-a72b-7d7e591ed126
--- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

http://www.cbat.eps.harvard.edu/unconf/followups/J15384000-4744500.html

Spectroscopy and multiband photometry are urgently required.

Clear skies,
Patrick