[vsnet-alert 16939] Re: TCP J19001574+0132356: possible nova (11.7 mag) in Aquila

Kirill Sokolovsky kirx at scan.sai.msu.ru
Sat Feb 22 21:45:53 JST 2014

Dear Brian, Patrick, and everyone,

The reported possible transient might in fact be a comet C/2012 X1 
(LINEAR) which is now moving slowly through this area.

There unfiltered images obtained around 2014 02 22.48 UT with a remotely 
controlled 100cm telescope + STL-11000M CCD located at Mayhill, New 
Mexico (MPC code H06) show no objects brighter than 13.6mag at the 
reported position. The images show the comet slowly moving away (see 
the animation http://scan.sai.msu.ru/~kirx/img/pnv_aql/animation.gif ).

WCS-calibrated FITS images together with archival images of the area for 
comparison are available at http://scan.sai.msu.ru/~kirx/img/pnv_aql/

With best wishes,

On Fri, 21 Feb 2014, Brian Skiff wrote:

> On Fri, 2014-02-21 at 23:10 +0000, Patrick Schmeer wrote:
>> TCP J19001574+0132356
>> R.A. 19h00m15.74s  Decl. +01°32'35.6"  (J2000.0)
>> 11.7 mag (unfiltered) on 2014 Feb. 21.8564 UT
>> "Koichi Nishiyama, Kurume, Japan and Fujio Kabashima, Miyaki, Japan report a discovery of TCP (mag.= 11.7) in Aql on two 40-s unfiltered CCD frames taken around 2014 Feb. 21.8564 UT ( limiting magnitude=13.2 ), using a 105-mm f/4 camera lens (+SBIG STL6303E camera). We have confirmed immediately the appearance of our discovery this PN on five 3-s unfiltered CCD frames taken around 2014 Feb 21.8695 UT (limiting magnitude=18.0), using a Meade 200R 0.40-m f/9.8 reflector (+SBIG STL1001E camera). (lens magnitude of referred catalogue Hipparcos, others reference catalogue GSC-ACT) Nothing is visible at this location on two past survey frames taken on 2013 Dec 07.392 UT(limiting mag.= 13.1) and 2014 Feb. 15.866 UT (limiting mag.= 13.1) nor on USNO-B1.0, We have checked in Minor Planets. nearest star in USNO B1.0 has position end figures 15s952, 41"60, distance 6".8, magnitudes B2=16.52 R2=14.50 I=13.67"
>> http://www.cbat.eps.harvard.edu/unconf/followups/J19001574+0132356.html
>     On the UKIDSS DR6 K-band image is a star right at
> the detection threshold within a few tenths of an arcsecond
> of the position quoted.  I estimate 19 00 15.73 +01 32 35.8
> using the image obtained from the Goddard SkyView utility.
> (The image is epoch 2005.6724.)  Comparing with other stars
> in the immediate field, it is about K mag 19 to 20.
> Perhaps once the coordinates are refined, then a more certain
> link can be made.
> \Brian

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