[vsnet-alert 16274] Re: faint possible nova next to V503 Cyg?

[Denis Denisenko]

This is not a nova, but previously unreported red variable (Mira or
semiregular). It shows large variability on Palomar red plates (R1=17.87 on
1953-06-14 plate, not visible on 1992-08-27 plate). Also, USNO-B1.0 gives
near-IR magnitude I=14.65 from the 1992-06-20 plate.

The star is very red in the infrared band:
2MASS 20263897+4337182
20 26 38.972 +43 37 18.27  J=9.777+/-0.024  H=8.115+/-0.067  K=7.246+/-0.021
WISE J202638.97+433718.2
W1=6.417+/-0.043 W2=6.041+/-0.023 W3=5.342+/-0.015 W4=4.741+/-0.033

This is why it shows well on the unfiltered images (in the "white" light).
It was already there 4 months ago on MASTER image (we rarely look that
close to the Galactic plane):

2MASS 20263897+4337182
  20130430.773 14.95C MASTER-Amur

Denis Denisenko
Member of MASTER team at SAI MSU

On Tue, Aug 27, 2013 at 6:36 PM, FIDRICH Robert (Fidusz) <fidusz at zpok.hu>wrote:

> Andrew Cason alerted us on the AAVSO Forum, that there is a faint possible
> nova in Cyg:
>
> PNV J20263897+4337182   2013 08 22.9128*  20 26 38.97 +43 37 18.2  15.6U
>
> http://www.cbat.eps.harvard.edu/unconf/followups/J20263897+4337182.html
>