[vsnet-alert 19307] TCP J05002724+1334199

[Hiroyuki Maehara]

TCP J05002724+1334199   2015 11 28.557 *  05 00 27.24 +13 34 19.9  12.3 U             Ori        0 1
http://www.cbat.eps.harvard.edu/unconf/followups/J05002724+1334199.html


 Shizuo Kaneko (Kakegawa, Shizuoka, Japan) has reported a discovery of
a new transient at mag 12.3 on two survey images taken on Nov. 28.557
(UT) with a f.l.=200mm (F/2.8) lens + Canon EOS 5D markII DSLR camera. 
Confirming CCD images of this object taken around Nov. 28.98 with a 
0.32-m f/8.0 telescope (itelescope.net T18) and 29.64 with a 0.32-m f/9 
(itelescope.net T9) yield the following position and magnitudes: 
R.A.= 05 00 27.24, Decl.= +13 34 19.9 (J2000.0); Nov. 28.981, V=12.5;
28.982, R=12.8; 28.984, B=12.0; 29.638, V=12.8; 29.642, R=13.4; 29.644,
B=12.6. Nothing is visible on the archival images taken from Oct 14
to Nov 27 at the position (limiting mag: 14.7-15.8).

This object is identical to a red star SDSS J050027.24+133419.9 (u=19.2,
g=18.6, r=17.6, i=16.5, z=15.8), a 18-mag UV source GALEX J050027.2+133420
(FUV=18.5, NUV=18.4), and an X-ray source 1RXS J050027.7+133415
= 1SXPS J050027.1+133418.

The pre-discovery upper limits, discovery and confirming observations
by Mr. Kaneko are summarized as follows.
------------------------------------------------
f.l.=200mm (F/2.8) lens + CANON EOS 5D markII DSLR Camera (unfiltered)
20151014.66406 <15.6
20151104.66821 <15.8
20151120.65100 <15.5
20151127.62873 <14.9
20151127.62907 <14.7
20151128.55723  12.3
20151128.55759  12.7
20151128.74900  12.2
20151128.74932  12.3
20151128.75148  12.0
20151128.75167  12.4

0.32-m f/8.0 + SBIG-STXL-6303E CCD Camera (iTelescope T18 at Nerpio, Spain - MPC I89)
20151128.98090  12.5  V
20151128.98213  12.8  R
20151128.98362  12.0  B

0.32-m f/9 + SBIG ST-8XME CCD Camera (iTelescope T9 at Siding Spring - Australia - MPC Q62)
20151129.63807  12.8  V
20151129.64172  13.4  R
20151129.64435  12.6  B
------------------------------------------------